Technical Manual for the EMT 10T embroidery peripheral • • • • • Part Number 110291-01, Revision D Single Head, Ten Needles Tubular Goods Hooping Automatic Color Change Under Thread Control
1575 West 124th Avenue Denver, Colorado 80234 United States of America Internet Address: publications@melco.com Copyright © Melco Embroidery Systems, 1997, 1998 ALL RIGHTS RESERVED No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without prior written approval of Melco Embroidery Systems.
Table of Contents 1. Introduction Scope Of Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Standard Conventions Used In Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Glossary Of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Good Maintenance Practice . . . . . . . . . . . . . . . . .
Table of Contents X Beam Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X Drive Belt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Needle Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacing Needle Bar / Presser Foot / Associated Parts . . . . . . . . . . . . . . Needle Case Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replacing Needle Case Cross Roller Bearing . . . . . . . . . . . . . . . . . . . . . . Cross Roller Bearing Centering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Picker Finger Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Picker Home Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Picker Height/Depth Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grabber Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Under Thread Control (UTC) Replacement . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1 1. Introduction Scope Of Manual The EMT 10T Embroidery Peripheral Technical Manual is a guide for performing repairs and adjustments which go beyond routine operator maintenance. Although these procedures are best understood and performed by professional service technicians in conjunction with specific factory technical training, much of the information in this manual may be useful reference for others who might possess appropriate technical aptitude and skills.
1-2 Maintenance Philosophy • To indicate that two or more keys must be pressed to obtain a desired result, each key is indicated with commas between them. An example is: Press Shift,8 to type an asterisk (*). Occasionally in the manual, special attention by the user is required. In this situation, "attention getters" are used to indicate the need for the user to be aware of a situation that is above and beyond the normal or routine.
Warranty Considerations 1-3 Good Maintenance Practice The procedures in this manual are guidelines for performing repair maintenance and must be used by personnel practicing good maintenance and repair technique. Good maintenance technique includes, but is not limited to, adhering to all precautions and safety considerations when working on the unit, and using the correct tools for the job being performed. WARNING! Personal injury may result if proper precautions are not observed.
1-4 Functional Arrangement Electrical Grounding WARNING! It is very important that the power cord be plugged into a properly wired electrical outlet. Failure to have a properly wired outlet may result in damage to the equipment and injury to personnel. It is recommended that a licensed electrician be consulted to assure that the electrical outlet is properly wired and grounded.
Configuration Procedure 1-5 Configuring the EMT 10T Occasionally during the operation of the EMT 10T, certain situations may arise when the peripheral software simply "locks up." You may often recover from this type of situation by performing what is called "Configuring" (or Re-configuring) the embroidery peripheral. (When this type of situation happens with a computer, you are usually asked to perform a "soft reboot" [Ctrl], [Alt], [Del].
1-6 Troubleshooting LEDs and Test Points Troubleshooting LEDs and Test Points At the front of the EMT 10T is a metal cover plate over a variety of indicator LED lights and a series of test points for checking certain voltages with a multimeter. This area is provided for observing various machine conditions, especially while troubleshooting problems that may occasionally occur.
Configuration Procedure 1-7 GREEN (all should be ON) 1) I/O FPGA (I/O IC on CPU configured OK at startup) 2) Control FPGA (Control IC on CPU configured OK at startup) 3) +5V (Power OK from CPU) 4) +6V (Isolated) OK * TEST POINT Voltage Tolerances 5) +36V OK (see note **) 6) +24V OK +6 VDC ISO (+5.6 to +6.1 VDC) 7) -12V OK +36 VDC [without load] (+30 to +37 VDC) 8) +12V OK +36 VDC [with 20-100% load] (+34.2 to +37.8 VDC) 9) +5V (+12V based) OK +24 VDC (+22.8 to +25.
1-8 Various Technical Specifications Various Technical Specifications The following is a list of various tension and force specification for the EMT 10T (All specifications to be within plus or minus 10% unless otherwise indicated): X Drive Belt Tension. . . 25 lbs. measured on top portion with carriage to left side Y Drive Belt Tensions . . . . . 40 lbs. measured on top portion with beam full back Y Motor Belt Tension. . . . . . . . . . . . . . . . . . . . . 40 lbs.
Drive Belt Tensions 2-1 2. Service Maintenance (except head and trimmer) General This section of the manual provides parts replacement procedures and various adjustments required during parts replacement or other service repairs of all areas of the machine except the embroidery head. Embroidery head service maintenance information other than trimmers is located in Section 3 of this manual. Trimmer service maintenance information is located in Section 4.
2-2 Keyboard Section Keyboard Section Keyboard/Display Replacement To remove the keyboard/display assembly from the cover, refer to Figure 2-1 and the following procedure: Keyboard Section Figure 2 - 1 1. Turn OFF the power switch to the EMT 10T and remove the power cord from the power source electrical outlet and the rear of the machine. 2. Remove the cable cover from the base plate at the rear of the keyboard/display assembly. 3.
Display Screen Intensity 2-3 8. Remove the PCB and cover together. 9. Install a static grounding strap between the working surface and the personnel performing this procedure. 10. Remove the 4 screws that secure the keyboard/display assembly PCB to the cover. 11. Disconnect the 3-button harness from the PCB. 12. Remove the keyboard/display assembly PCB from the keyboard cover. 13. Transfer the key caps from the old PCB to the new PCB by simply lifting them off of the keys by using finger pressure only.
2-4 Lamp Assembly Disk Drive 1. Remove the keyboard/display assembly and cover as previously described. side bracket screws 2. Disconnect the disk drive harnesses. keyboard base plate 3. Remove the 4 screws shown in Figure 2-3 that hold the drive to the side brackets. disk drive 4. Replace the disk drive and re-install the hardware, harnesses, and keyboard/display assembly and cover that were removed earlier.
Display Screen Intensity 2-5 Bobbin Winder The optional bobbin winder is mounted in the left rear table top. There is no need to remove the bobbin winder assembly from the table top to service it. Simply remove the 4 truss screws holding the table top over the power distribution section. As you lift the table top and bobbin winder assembly upward, disconnect the two harnesses going to the bobbin winder motor and switch. The built in bobbin winder receives its power from the EMT 10T 12 V source.
2-6 E-Stop Switch Replacement E-Stop Switch Replacement The emergency stop switch is located just to the left of the tensioner assembly, on the left tensioner bracket. Refer to the following procedure to replace this switch: 1. Turn OFF the peripheral and unplug the power cord from the source. 2. Remove the three screws and any ground wire; then remove the cover from the left side of the thread tensioner assembly as shown in Figure 2-6.
Display Screen Intensity 2-7 6. Remove the locking collar the rest of the way off the assembly and remove the remainder of the e-stop switch assembly. 7. Install a new e-stop switch assembly by reversing the previous steps for removing the old one. The switch block and assembly body are keyed for assembly in one orientation only. switch pole markings switch block wire D wire C 8.
2-8 Power Distribution Section Power Distribution Section This section is comprised of various functions including power entry, line filter, and switching circuitry for 110 or 220 volt operation. The various voltage sources for logic circuits, motors, and solenoids are integrated into the power distribution module. Additionally, the e-stop controls are built into the PCB located in this module (see Figure 2-9). The section is located under the left rear table top.
Module Replacement 2-9 the two left side screws at the base of the distribution section (loosen screws ONLY) three harnesses entering at the top the two right side screws at the base of the distribution section (remove completely) ground wire four screws at the rear of the peripheral power switch harness power distribution module Figure 2 - 9 5. At the rear of the peripheral, remove the four screws holding the power distribution module to the rear wall of the power distribution section. 6.
2 - 10 Power Distribution Section 10. Push the module toward the rear allowing the loosened screws to capture the module within the right angled portion of the slots. 11. Install remaining two screws in the base of the power distribution module and four in the rear wall of the power distribution section. Tighten all eight screws. 12. Reinstall the three harnesses in the top, the power switch harness at the side, and the ground wire to the stud near the rear left corner of the power distribution section.
Remove Card Cage Cover 2 - 11 Electronics Section The electronic section consists of the major electronic printed circuit boards located within an RFI controlling box called the card cage. The card cage is located under the right rear table top. Remove Table Top To access the card cage, remove the right rear table top (with lamp assembly) described as follows: 1. Loosen the right rear table top (with lamp assembly) by loosening the 4 truss screws (2 at the front and 2 at the rear).
2 - 12 Electronics Section IMPORTANT: Do Not operate the embroidery peripheral with the electronics cover removed. This cover provides the top of the EMI shielding for reducing RF interference. Operating the equipment without the shield (cover) can be a violation of FCC regulations. Card Cage Components Inside the card cage is found the Backplane PCB laying in the bottom with it’s respective PCBs inserted upright into its connectors.
Ethernet Network PCB 2 - 13 Interface PCB Ethernet network PCB CPU PCB Low Voltage Driver PCB XYZ Motor Driver Amplifier PCB Backplane PCB (in bottom of card cage) Figure 2 - 11 Ethernet Network PCB The Ethernet PCB is positioned inside the card cage of the peripheral between the CPU PCB and the Interface PCB as Figure 2-11 shows. Refer to the following procedure for replacement. 1. Turn OFF the power switch to the EMT 10T. 2.
2 - 14 Electronics Section 5. Grasp the Ethernet PCB at the top corners and gently rock it out of its connectors in the backplane PCB. Remove the Ethernet PCB. 6. Replace the Ethernet PCB by reversing the previous steps. 7. Install the screw and washer at the card edge mounting bracket to secure the printed circuit board. 8. Reinstall the Ethernet cable to the end of the Ethernet PCB. 9. Remove the static grounding strap and replace the card cage cover. 10. Reinstall the right rear table top.
Backplane PCB 2 - 15 5. Remove the static grounding strap and replace the card cage cover. 6. Reinstall the right rear table top. XYZ Motor Driver Amplifiers The XYZ Motor Driver Amplifier PCB is positioned inside the peripheral card cage next to the Low Voltage Driver PCB and is the last PCB to the rear (see Figure 2-11). Refer to the following procedure for replacement. 1. Turn OFF the power switch to the EMT 10T. 2.
2 - 16 Electronics Section 4. Disconnect all the cables from the backplane PCB card cage 5. Remove the entire card cage by removing the four screws holding it to the base of the electronics section (see Figure 2-12). 6. Remove the screws holding the cover over the backplane PCB connectors (see Figures 2-12 and 2-13). 7. Remove the screws holding the backplane PCB to the base of the card cage. backplane connectors cover 2 of 4 screws Figure 2 - 12 8. Lift the backplane PCB out of the card cage. 9.
X Motor 2 - 17 X Beam Assembly The X beam assembly consist of the X carriage, X motor, X drive belt, and various other mechanical components that make up the device that holds the hoop during the embroidery process. The X beam is attached to the Y drive system by connecting to the Y drive rails at either end of the beam. Refer to Figure 2-14 to identify various areas of the X beam assembly.
2 - 18 X Beam Assembly 2. Remove the X beam cover by first removing the six button head screws on the top, then lifting the cover off the entire length of the X beam. 3. Refer to Figure 2-14 and remove the three screws that hold cover over the top of the X harness interface PCB. 4. Loosen the two tensioner block mounting screws shown in Figure 2-14, then loosen the drive belt tensioning screw to loosen the drive belt. 5. Rotate the X drive belt off the X motor pulley. 6.
X Drive Belt 2 - 19 14. If replacing the X drive belt, refer to the belt replacement and adjustment procedure at this time, otherwise proceed directly to the X drive belt tensioning procedure for instructions tightening the belt to the proper tension. X Drive Belt This belt is directly driven by the X motor shaft pulley and moves the X carriage left and right along the rail in the base of the X beam.
2 - 20 X Beam Assembly Belt Tension NOTE: This procedure requires a specific Melco force gauge (p/n 995585-01), for proper adjustment. 1. Refer to Figure 2-14 and ensure the two tensioner block mounting screws are installed and holding the drive belt tensioner block loosely to the X beam frame. Caution: Over tightening the screw in the next step may cause damage to the motor shaft or other drive components. 2.
Y Motor 2 - 21 6. Grasp the force gauge body and push down on the gauge until the lower loop of the belt just touches the X carriage rail. 7. Read the scale on the gauge while maintaining the situation in the previous step. The reading should be between 3.5 and 4.0 pounds (3.75 +/- 0.25). 8. If the reading on the gauge is not within the specified range, repeat this belt tension procedure until the reading is within the specified range.
2 - 22 X Beam Assembly 4. Move to the rear of the peripheral and locate the Y motor and its mounting bracketry and drive pulleys shown in Figure 2-17. Y shaft bearing support bracket Y pulley Y shaft Y motor Y motor drive belt motor bracket belt tensioning socket head cap screw motor bracket screws (2 each) Y motor pulley motor screws (4 each) Figure 2 - 17 5. From the electronics section of the peripheral, locate the in-line connector for the motor power and disconnect it. 6.
Y Motor Belt 2 - 23 12. Position the new motor slightly through the Y shaft Bearing support bracket and connect the Y motor encoder harness as noted in the previous step and below. NOTE: When viewing from the rear of the motor and the encoder pins facing upward, the number 1 pin is to the right. The encoder harness connector pin number 2 does not have a wire, therefore, the harness connector attaches to the encoder pins with the open wire space being the second one from the right. 13.
2 - 24 X Beam Assembly 1. Refer to the procedure for removing the left rear table top (with optional bobbin winder assembly) and remove the table top. 2. Refer to Figure 2-18 and check the Y motor belt tension using the Melco force gauge (p/n 995585-01) and the steps that follow: make first pencil mark here at inside surface of wall edge Y motor belt (rear loop) make second pencil mark here (0.2" from first pencil mark) Melco force gauge (p/n 995585-01) read 10 +/- 2.
Y Drive Belt 2 - 25 7. Grasp the force gauge body and push the gauge against the belt until the plunger moves from the first mark at the edge of the wall to the second mark. 8. While holding the gauge at the second mark position described in the previous step, read the scale on the gauge. The reading should be 10 +/- 2.0 pounds. 9. If the reading on the gauge is not within the specified range, the belt needs to be adjusted.
2 - 26 X Beam Assembly right side Y belt tension adjustment access holes the left side cover and Y belt tension adjustment access holes are a mirrored duplicate of the right side right side cover truss head screw (1 of 5) Figure 2 - 19 3. Refer to the Caution statement at the beginning of this procedure and be certain the Y drive belt in the other Y carriage is secure and with some amount of tension. 4. Move the X beam to the rear until it mechanically stops. 5.
Y Drive Belt 2 - 27 Y carriage block Y drive belt cap head screws for adjusting belt tension belt mounting clamp and screws access holes Figure 2 - 20 12. Be certain the teeth on the new belt are positioned in the proper location in the rear pulley to maintain the parallelism between the X beam and Y carriages. 13. Rotate the adjusting socket head cap screws in the front approximately 3 revolutions clockwise to take up the slack in the belt and provide some amount of tension. 14.
2 - 28 X Beam Assembly Belt Tension Adjustment To adjust the Y drive belt tension, refer to the following procedure: NOTE: This procedure requires a specific Melco force gauge (p/n 995585-01), for proper belt adjustment after replacing the motor. 1. While observing the movement of the Y belt on the front pulley, move the beam forward and backward. The belt will vary somewhat on the surface of the pulley. This is commonly called belt tracking. 2.
Y Drive Belt 2 - 29 7. Release the downward force on the gauge plunger and allow the finger to apply an upward force to the bottom of the top loop of the belt. 8. Read the scale on the force gauge. The reading should be 2 +/- 0.25 pounds. 9. If the tension is not correct, slightly tighten the two belt tensioning socket head cap screws equally to increase tension on the Y drive belt; or loosening the screws to reduce the tension. 10.
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Replacement 3-1 3. Embroidery Head Maintenance General This section of the manual provides parts replacement procedures and various adjustments required during repair maintenance of the embroidery head only. Information for service maintenance on trimmers is located in Section 4 and the rest of the machine is located in Section 2 of this manual. These procedures are guidelines for performing repairs and must be used by personnel practicing good maintenance and repair techniques.
3-2 Z Motor Motor bracket mounting/tensioning nuts Figure 3 - 1 5. Remove the four cap head screws attaching the motor to the bracket standoffs. 6. Lift the motor away from the standoffs and allow the drive belt to slip off the motor drive pulley. 7. Loosen the pulley set screws and remove the pulley from the motor shaft. 8. Place the pulley on the new motor shaft and slightly tighten one of the pulley set screws. 9.
Introduction 3-3 Belt Tension NOTE: This procedure requires a Gates 5M Tensiometer (Melco p/n 992165-01) for proper belt adjustment. 14. Apply downward pressure on the motor to establish a belt tension of 7 pounds (+/- 1 pound) measured with the Gates Tensiometer. Tighten the motor bracket mounting/tensioning nuts while maintaining the belt tension. 15. Connect the Z motor harness to the end of the cable from the electronic card cage connector and replace the covers removed earlier.
3-4 Z Shaft Encoder The procedures in the following pages will result in the most proper and accurate alignment and repair of the Z encoder system that is possible and/or feasible in the field by a technician. It can be seen that the proper alignment of the Z encoder can result in maintaining embroidery quality and proper machine operation. Slight Z encoder misalignment can cause many kinds of erratic operation and/or intermittent thread breaks.
Installation 3-5 6. While slowly rotating the head, check that the green LED on the front or the innermost LED on the CPU blinks once each revolution (this is the "index" or "headup" mark). 7. If there is no evidence of the LED blinking, inspect the electrical connectors (encoder cable plug and encoder body) for loose wires, loose fits, and any visual damage. Clean connections and/or replace components as necessary. 8. Rotate the head again to check for the blinking LED.
3-6 Z Shaft Encoder head Z shaft coupler cap head screws (B) Shaft Pulley Z encoder shaft coupler cap head screws (A) Z encoder Jam Nut 54321 Z Encoder Shaft Coupler Z Encoder Cable Z Motor white red black black green orientation of encoder cable connector according to wire locations Figure 3 - 3 10. Orient the connector on the encoder cable so the outside black wire is to the right and will plug into pin 1 of the new encoder (see inset in Figure 3-3).
Calibration 3-7 2. With the network cable removed (or boot disk not inserted into the disk drive), turn ON the embroidery peripheral. 3. Locate the green LED marked "ZINDEX" on the front of the peripheral, above the lowered table top (see Figure 3-2). Or with the card cage cover removed, locate the innermost LED on the top of the CPU. 4. Remove the color change covers to access the alignment hole in the next step (see Figure 3-4).
3-8 Z Shaft Encoder head up alignment pin tool Z drive pulley Z Encoder Z Motor Figure 3 - 5 9. Remove the head up alignment pin tool and rotate the Z shaft until you can access the second cap head screw on the encoder coupling to Z shaft. 10. Remove the screw and apply a small amount of Loctite 222 hardware adhesive (or equivalent) and reinstall and tighten it. 11.
Assembly Removal 3-9 Thread Tensioner Assembly Assembly Removal 1. Turn OFF the EMT 10T and disconnect the power cord from its power source. 2. Remove the three screws and any ground wire; then remove the cover from the left side of the thread tensioner assembly shown in Figure 3-6. tensioner cover (left side) ground wire thread tensioner assembly tensioner cover (right side) Figure 3 - 6 3. Remove the two screws and the thread tube retaining bracket from the top of the right side tensioner cover. 4.
3 - 10 Thread Tensioner Assembly Thread Guide Tubes The thread guide tubes from the thread tree extend into the tensioner bracket. If you wish to remove the tensioner bracket assembly further from the head, you will need to remove the thread guide tubes. 1. Remove the thread from the thread guide tubes. 2.
Check Spring Replacement 3 - 11 5. Perform the thread tensioner check spring adjustment that follows the check spring replacement procedure. The adjustment procedure, not only adjusts the check spring tension, but secures the thread tensioner in the tensioner bracket by tightening the set screw previously loosened in this procedure. Check Spring Replacement 1. As described previously, remove the thread tensioner associated with the check spring that is being changed. 2.
3 - 12 Thread Tensioner Assembly Check Spring Adjustment After replacing a thread check spring, install the thread tensioner into the thread tensioner mounting bracket. You must then adjust the tension of the check spring against the thread break contact. To set this tension: 1. Slightly loosen the set screw in the top of the thread tensioner mounting bracket that secures the thread tensioner (see Figure 3-8). 2.
Replacing A Thread Break Contact Post 3 - 13 If you rotate less than 2 spokes you will begin to lose the force needed to make a tight stitch. You may have enough stroke but not enough force to cinch up the stitch tightly. You may also begin to have failure of thread break detection. You must have enough rotation to cause the check spring to make a good contact with the thread break contact post. A poor contact will often not provide the signal to stop embroidering when there is a thread break.
3 - 14 Jump Stitch Solenoid Jump Stitch Solenoid Replacement If a jump stitch solenoid must be replaced, follow these steps: 1. Color change the needle case to needle #10 for best access to the solenoid area. side two screws top two screws left color change cover 2. Remove the left color change cover behind the tensioner bracket assembly by first loosening the top two screws then removing the side two screws (see Figure 3-12). 3.
Replacement 3 - 15 6. Remove the 2 screws holding the mechanical jump stitch mechanism and cover to the jump stitch bracket as shown in Figure 3-14. Remove the mechanism and cover. Jump Stitch Solenoid and Bracket cover screws record solenoid threads here Mechanical Jump Stitch mechanism and cover 2 solenoid bracket screws Jump Stitch Solenoid locking nut SHOWN WITH NEEDLE CASE AND OTHER PARTS REMOVED FOR CLARITY ONLY Figure 3 - 14 5.
3 - 16 Jump Stitch Solenoid NOTE: During installation the solenoid must be adjusted properly. If you did not adhere to the previous NOTICE, or if for some other reason, the adjustment for the solenoid is not correct, Refer to the following jump stitch solenoid adjustment procedure for the proper adjustments. Adjustment If a jump stitch solenoid has been replaced, you may have to perform one or more of the following adjustment procedures. The needle case must be removed to perform these adjustments.
Adjustment 3 - 17 Bracket Positioning When attaching the jump stitch solenoid and bracket, it is not only necessary to place the plunger correctly, but you must also position the assembly in the proper forward to backward relationship. There are three concerns in positioning the solenoid and bracket assembly: Bracket Position 1 The solenoid and bracket assembly should be far enough forward so the plunger will cause the reciprocator to rotate enough to release the needle bar during the jump stitch cycle.
3 - 18 Color Change Color Change The color change PCB, the color change motor, the cam, and harnesses are located under the color change covers behind the embroidery head tensioner area. PCB Replacement The Color Change PCB is an interface from the CPU for color change commands from the design and keyboard; and thread break and needle position information from the tensioner PCB. To remove the color change PCB refer to the following procedure: 1.
Color Change Motor Replacement 3 - 19 CAUTION! The Color Change PCB is snapped into place on top of the color change bracket. Be careful not to damage the photo sensors or any other components when removing the PCB. 6. Remove the color change PCB by lightly prying up on the board near the 4 catch pins that hold the PCB in place. The color change PCB should simply lift off of the color change housing.
3 - 20 Color Change 3. Remove the color change motor encoder cover (see Figure 3-18). 2 pulley set screws 4 motor mounting screws color change motor drive belt color change motor encoder cover motor drive pulley Figure 3 - 18 The color change harness connector at the color change motor encoder is captured and is not removable unless the encoder is slightly disassembled. CAUTION: Use extreme care in the next few steps not to damage the color change motor encoder disc. 4.
Color Change Cam Assembly Replacement 3 - 21 Color Change Motor Belt Tension The color change belt tension should cause the color change cam to rotate with minimum backlash. The belt should be tensioned with some amount of slack so it is not so tight that it wears the color change shaft and bushings needlessly. Adjust the color change belt tension by loosening the color change motor mounting screws and moving the motor to make the belt more or less taut.
3 - 22 Color Change color change bracket (with cam and hardware) 2 color change bracket screws color change mount key Figure 3 - 20 5. Refer to Figure 3-21 and disassemble the various parts of the color change cam assembly to replace the part in question. Leave the pulley and spacer attached to the left side of the shaft if possible. spacer pulley color change bracket thrust bearing shaft spacer thrust washer (2.75mm thick) thrust washer (1.
Color Change Cam Assembly Replacement 3 - 23 8. Position the pulley and spacer against the left outside of the bracket and the color change cam against the two 2.75mm thrust washers and thrust bearing combination to take up the slack. Tighten the color change cam onto the shaft flats. 9. Position the inside split-hub clamp against the two 1.00mm thrust washers and thrust bearing combination and the outside split-hub clamp and spacer against the right outside of the bracket to take up the slack.
3 - 24 Needle Case Needle Case Replacing Needle Bar / Presser Foot / Associated Parts To replace a needle bar, presser foot, or other parts associated with this area refer to the following steps: 1. Turn ON the EMT 10T and bring the head to the HEAD UP position. 2. Turn OFF the EMT 10T and disconnect the power cord from its power source. 3. Remove the thread tensioner bracket assembly as described in a previous procedure. 4.
Replacing Needle Bar / Presser Foot / Associated Parts 3 - 25 7. Next, loosen the needle bar stop clamp (black clamp). 8. Loosen the top screw (see Figure 3-23) on the needle bar. (You will remove and transfer the screw in step 11.) CAUTION! After the next step, the needle bar is free to be moved out the top of the needle case. Use care so the springs and other parts do not suddenly fly out of position. 9. Loosen the needle bar clamp. 10.
3 - 26 Needle Case 14. You may reinstall the upper needle case cover at this time. The lower needle case cover must, however, remain off to perform the needle bar height adjustment. 15. After installing a new needle bar, you must adjust the needle bar height. Refer to the adjustment procedure for Needle Depth found later in this manual. 16. When the needle bar height has been properly adjusted, reinstall the lower needle case cover.
Needle Case Removal 3 - 27 Caution! You must remove the needle position photo sensor interrupter blade to avoid damage to the photo sensors on the color change PCB. 6. Remove one and loosen the other of the 2 screws that hold the sensor interrupter blade to the top of the needle case. Carefully slide the blade out from between the photo sensors under the color change PCB. 7.
3 - 28 Needle Case Replacing Needle Case Cross Roller Bearing Refer to the figures within the needle case removal and installation procedures for this procedure. 1. Remove the needle case as described previously in this manual. 2. Remove the clamping devises that were installed at each end of the V-rail during the removal of the needle case. 3. Carefully slide the bearing retainer plate assembly with cross roller bearing off either end of the V-rail. 4.
Cross Roller Bearing Centering 3 - 29 cross roller bearing needle bar guide shaft felt pad embroidery head v-rail retainer plate TOP VIEW Figure 3 - 26 6. Check that the cross roller bearing is centered in the 2 v-rails by the following method: 110291-01, Rev D a) Center the retainer plate assembly on the embroidery head v-rail. b) Carefully insert a solid instrument, such as a straight allen wrench, into the opening at one end where the two v-rails join.
3 - 30 Needle Case Retainer Plate Bearing Adjustment Note: This procedure requires the use of a special service tool: the V-Rail Adjustment fixture (p/n 995675-01). 1. Loosen the two socket head cap screws holding the needle case v-rail to the retainer plate assembly as indicated in Figure 3-27.
Replacing Reciprocator / Needle Bar Guide Shaft 3 - 31 7. Push the retainer plate assembly left and right as far as possible without the bearings coming off the end of the embroidery head v-rail. While moving the retainer plate assembly try to hold the bearings from rotating (one at a time) with your fingers. With a medium amount of pressure, you should be able to stop the bearing rotation. 8.
3 - 32 Needle Case 7. Install the new reciprocator into the head (see Figures 3-28 and 3-29). Make sure it is oriented properly and insert the connecting stud onto the connecting rod. 8. Add two drops of machine oil onto the needle bar guide shaft (or new guide shaft if replacing). 9. Install the needle bar guide shaft as follows (see Figures 3-28 and 3-29): a) Insert the guide shaft down through the hole in the top of the head. b) Insert the guide shaft through the reciprocator.
Installing Needle Case 3 - 33 Installing Needle Case To reattach the needle case refer to the following procedure: 1. Insure the following conditions are set: a) The cross roller bearing is properly installed and centered as described in the section titled Cross Roller Bearing Centering. b) The retainer plate assembly bearings are properly adjusted as described in the section titled Retainer Plate Bearing Adjustment.
3 - 34 Needle Case socket head cap screws securing needle case needle case locator socket head cap screw bearing retainer plate needle case Figure 3 - 30 7. Remove the clamping devises from each end of the V-rail and reinstall all covers that were removed during the procedure. 8. Power up the peripheral and position the needle case to needle #5. 9. Go into the Head Timing menu and bring needle #5 down slowly, using the key. 10. Check for the needle centered in the needle plate hole. 11.
Lower Rail Retainer Adjustment 3 - 35 Lower Rail Retainer Adjustment This adjustment affects the forward and backward movement of the bottom of the needle case. Do not make the adjustment so tight that you preload the roller bearing in the head so it wears prematurely. Do not have so much free play that the needle has excessive movement. 1. Install the needle case into the lower rail retainer and attach the needle case to the retainer plate assembly. Refer to the needle case installation procedure. 2.
3 - 36 Rotary Hook Rotary Hook Hook Replacement This procedure includes steps for setting hook timing during the hook installation process. After completing this procedure, hook timing adjustments are complete and there is no need to refer to any further hook timing procedure. If you are not replacing the hook but wish to check and adjust hook timing only, refer to that section later in this manual. 1. Move the the table top to the lower position, or remove it and set it aside. 2.
Hook Replacement 3 - 37 12. Press the keys. The head rotates to the ‘‘Needle Depth’’ position without bringing the needle down and the LCD displays NEEDLE DEPTH 180.0. If the hook point does not extend to the needle, it is referred to as "retarded" If the hook point extends beyond the needle, it is referred to as "advanced" 13. Press and the head rotates to the ‘‘Hook Timing’’ position. The LCD displays HOOK TIMING 200.0. 14.
3 - 38 Rotary Hook 19. Install the UTC assembly with the retaining finger tab inside the rotary hook bobbin basket notch. Install the screws. Adjust The UTC Assembly You must adjust the UTC assembly to a level where the needle will not contact the detection arm during the needle depth procedure. 20. Place the UTC Combination Gauge (p/n 009027-01) from the operator kit between the retaining tab of the UTC and the notch in the hook basket (see Figure 3-35).
Hook Replacement 3 - 39 If the clearance needs to be adjusted proceed with the next step. If OK, go to the Needle Depth adjustment procedure. 25. Slightly loosen the two small screws on the underside of the UTC assembly shown in Figure 3-37. VIEW from UNDER the UTC ASSEMBLY (assembly shown removed from needle plate support bracket, but is actually attached during this adjustment) slotted screw hole UTC sensor body UTC sensor body screws Figure 3 - 37 26.
3 - 40 Rotary Hook 32. Next press . The head rotates one revolution. The LCD displays ONE REVOLUTION 110.0. The needle bar should be down with the presser foot about 1/4 inch from the needle plate. NOTE: If the needle does not come down the upper dead stop clamp may need adjustment as described later in this procedure. For now, however, complete the needle depth adjustment by grasping the presser foot and pulling down until the needle bar catches securely.
Hook Replacement 3 - 41 lower needle case cover (removed) upper dead stop clamp screw (black) needle bar clamp screw (silver) Figure 3 - 39 40. Loosen the screw on the upper-dead-stop clamp again and slide the clamp against the upper stop bumper. The screw must be positioned directly forward. If it is rotated, it may rub the plastic guide plate or catch the needle bar next to it during its down stroke. Tighten the upper-dead-stop clamp screw. 41. Press . The head rotates to GO TO HEAD UP 110.0. 42.
3 - 42 Rotary Hook Hook Timing Adjustments Only This procedure is for checking and setting hook timing adjustments when the hook assembly is not being replaced. If you are replacing the hook assembly, refer to the preceding section in this chapter. If you suspect your peripheral has gone out of timing due to hitting a hoop, bird nesting, or some other reason, follow these steps: 1. Move the the table top to the lower position, or remove it and set it aside. 2.
Hook Timing Adjustments Only 3 - 43 If hook timing is correct, proceed to the UTC Adjustments in the next procedure. If hook timing is NOT correct, proceed to Step 11. This gap should be 0.002 - 0.008" Needle scarf 11. While the hook is still in the HOOK TIMING position, color the screw on the RIGHT side of the hook (see Figure 3-42) with a felt-tipped marker. DO NOT LOOSEN THIS SCREW AT THIS TIME. 12. Press until you see the 2nd screw. Loosen this screw. 13. Press until you see the 3rd screw.
3 - 44 Rotary Hook 20. Position the POINT of the HOOK directly behind the SCARF of the needle. Leave a THREAD distance between the POINT of the hook and the needle. 21. Tighten the colored hook screw and check that the setting is correct as shown in Figures 3-40 and 3-41. 22. Press the key to rotate the the hook to access the other two hook screws and tighten them securely. UTC Adjustments 22. Refer to the UTC and Needle Depth adjustments on Pages 3-38 through 3-41. 23.
4-1 4. Trimmer Maintenance General This section of the manual provides parts replacement procedures and various adjustments required during repair maintenance of the embroidery head trimmer system. Information for service maintenance on the rest of the embroidery head is located in Section 3 and the rest of the machine is located in Section 2 of this manual. These procedures are guidelines for performing repairs and must be used by personnel practicing good maintenance and repair techniques.
4-2 Trimmer Replacement Procedures 6. The beam makes two moves that clears the top thread (now called the tail) out of the material. 7. At approximately the same time the threads are being cut and the beam is moving to clear the tail, the grabber reaches out from behind the needle area and "grabs" the tail, pulling it up and back into the Velcro wiper strip. 8. When the trim is complete the peripheral begins embroidering again automatically.
Grabber Blade 4-3 3. Disconnect the grabber motor power, motor encoder, and grabber home optical sensor harness connections found in the bundle of harnesses in and about the grabber motor and encoder (see Figure 4-1). 4. Remove the two standoffs holding the grabber drive assembly to the embroidery head casting (see Figure 4-1). 5. Maneuver the grabber drive assembly out of the embroidery head casting. 6.
4-4 Trimmer Replacement Procedures 3. Reverse order of the above steps to replace the grabber blade. When reinstalling the grabber blade, orient the blade with the hook facing to the left, then slide it into the Velcro wiper bar, the grabber blade guide, then through the front blade cover. 4. At the location where the finger is pointing in Figure 4-2, just above the front blade cover, you may have to direct the grabber blade into the top blade cover. 5.
Trimmer Drive Assembly 4-5 set screw in top of solenoid mount hex nut between solenoid and mount trimmer solenoid solenoid mount cap head screw socket head cap screw mark solenoid mount position optical switch Figure 4 - 3 Trimmer Camming Mechanism 6. Rotate a new solenoid assembly into the mount. Do not tighten the set screw in the top of the mount at this time. 7. Reinstall the solenoid and mount to the movable frame. 8.
4-6 Trimmer Replacement Procedures Picker Solenoid Assembly This assembly is mounted under the embroidery head in the rear bed. To remove this assembly refer to the following steps: 1. Remove the left rear table top (with optional bobbin winder assembly). 2. Loosen the nut securing the solenoid to the bracket under the trimmer assembly and allow the solenoid to drop off the bracket. CAUTION! Use care not to loose the solenoid return spring in the next step. 3.
Movable Knife 4-7 mounting screws Picker Link Picker Swivel Pivot Picker Base and shaft set screw Picker Bracket Mount External Retaining Ring Figure 4 - 4 3. Slide the picker assembly out of the picker bracket mount. When re-attaching the picker link to the picker assembly, refer to the alignment section of this chapter for the alignment procedure for the picker position. Movable Knife 1. Remove the screws holding the needle plate. Remove the needle plate. 2.
4-8 Trimmer Replacement Procedures Connecting Link Under Thread Presser pin on Movable Knife Drive Arm socket head cap screw securing adjustable fixed knife and under thread presser hex head screw alignment pin/hole Adjustable Fixed Knife Movable Knife Figure 4 - 5 9. Rotate the knife and arm clockwise until the back side of the knife is resting against the left side of the needle plate bracket. 10. Tighten the hex head screw. 11.
Movable Knife Drive Arm 4-9 6. Remove the adjustable fixed knife and the under thread presser. 7. Replace the required new parts. 8. Install the socket head cap screw to secure the adjustable fixed knife and the under thread presser. Snug the cap screw until the parts are held securely. Do not over tighten. 9. After replacing an adjustable fixed knife or under thread presser, refer to the trimmer adjustment procedures later in this chapter for the adjustable fixed knife. Movable Knife Drive Arm 1.
4 - 10 Trimmer Adjustment Procedures Trimmer Adjustment Procedures One procedure combining all the required adjustments organized in specific order is presented in this section for providing the best success in making adjustments to the trimmer assembly. All the trimmer replacement procedures are found in the previous section. The EMT 10T Embroidery Peripheral trimmer system is assembled and thoroughly tested before the machine is shipped.
Z Timeout Errors 4 - 11 Damaged Trimmer Cam or Trimmer Solenoid To check for a damaged trimmer cam or trimmer solenoid, refer to the following procedure: 1. Remove the Z motor cover from the rear of the head. 2. Remove the rear bed cover of the head to expose the trimmer camming area as seen in Figure 4-7. solenoid pin end shown engaged in cam groove Drill hole in rear of cam.
4 - 12 Trimmer Adjustment Procedures 7. Refer to Figure 4-7 and manually engage the trimmer solenoid pin into the trimmer cam groove by pushing the protruded end of the pin inward with a flat bladed screw driver. 8. Hold the trimmer solenoid pin in as you continue to apply clockwise rotation to the Z drive pulley/belt. Rotate the head shaft at least one full revolution. You should not feel any restrictions during the rotation. If you do, you may have a damaged trimmer cam or trimmer solenoid.
Adjustable Fixed Knife 4 - 13 Trimmers Not Trimming Properly When the trimmers are not providing adequate trim quality, there are three general areas that may be contributing to the situation: 1) The physical condition of the trimmer parts, 2) The Movable Knife "home" position, and 3) The Movable Knife "select" position.
4 - 14 Trimmer Adjustment Procedures This situation may result if the adjustable fixed knife is worn or is not parallel to the trimming action of the movable knife. Check this condition of the adjustable fixed knife by inspecting the marks left on the surface of the movable knife that is under the adjustable fixed knife. If the marks are more severe in the area that aligns with one edge of the adjustable fixed knife, the adjustable fixed knife may need to be adjusted or replaced, or both.
Under Thread Presser 4 - 15 Checking the under thread presser is done in two parts. First by looking at the part itself to see if there has been any "crumpling" as shown in the bottom left section of Figure 4-9. Crumpling is damage caused by the movable knife hitting the under thread presser. If you see visual evidence of any damage, replace the under thread presser as described earlier in this chapter.
4 - 16 Trimmer Adjustment Procedures 6. If the under thread presser does not provide the required action, replace it and check using steps 2 to 4 again. 7. After you are satisfied with the under thread presser action, re-attach the connecting link (see Figure 4-7). Adjustable Fixed Knife Adjustment After replacing the adjustable fixed knife per the instructions earlier in this chapter it will need to be properly adjusted. Refer to following steps in performing this adjustment. Ink Wipeoff Test 1.
Adjustable Fixed Knife Adjustment 4 - 17 Knife Adjustment After performing the ink wipeoff test and determining that adjustment to the adjustable fixed knife is required, follow these steps to perform the knife adjustment. 6. Refer to Figure 4-12 and locate the two small set screws in the bottom of the needle plate bracket directly under the under thread presser.
4 - 18 Trimmer Adjustment Procedures 11. Check the tightness of the top socket head cap screw and recheck the adjustment by performing the ink wipeoff test once again. Cut Threads When you are satisfied with the ink wipeoff test, you may check the thread cutting ability by performing actual thread cuts at several locations across the cutting range of the knives. To do this refer to the following steps: 12.
Movable Knife Home Position 4 - 19 5. The movable knife should be located under the adjustable fixed knife, positioned as shown in Figure 4-13. If the sloped rear tip of the movable knife is not showing in front of the leading edge of the adjustable fixed knife, the "home" position needs to be adjusted. DO NOT Adjust if the knife position looks like Figure 4-13.
4 - 20 Trimmer Adjustment Procedures solenoid pin end shown engaged in cam groove Engage solenoid pin into cam groove by pushing here with flat bladed screw driver Indicator Tab trimmer solenoid Photo Sensor Movable Knife "home" position indicator adjustment screws Connecting Link screws for adjusting Movable Knife "home" position Figure 4 - 14 Home Position Sensor If the movable knife is mechanically adjusted correctly for home position, but the "Trimmer Not Home" message comes ON, the home positio
Checking Select Position 4 - 21 Checking Select Position After adjusting the movable knife home position, you must check for the movable knife "select" position. 1. Replace the standard needle plate on the embroidery head arm (See Figure 4-8). Do not install the raised needle plate used with cap frames. 2. Turn the machine power ON. 3. Go to the HEAD TIMING MENU and press to turn HEAD TIMING ON. 4. Press the and keys simultaneously to go into the "Z pos" mode.
4 - 22 Trimmer Adjustment Procedures Select Position Fixture (p/n 995372-01) this pin fits into the top of the needle plate hole. Movable Knife "select" position (with the rear of the blade against the fixture pin Needle Plate (Do not install the raised needle plate) fixture installed in needle plate hole Figure 4 - 15 12. Check the reading of the display to be between 311 and 313 degrees. 13.
Select Position Adjustment 4 - 23 3. Loosen the large socket head screw in the locking collar for the Top Bobbin Drive Pulley (see Figure 4-16) and rotate the belt and pulley slightly until the movable knife just contacts the select position fixture (see Figure 4-15). 4. Stop rotating and hold the belt and pulley in place while you tighten the large socket head screw in locking collar to 45 inch lbs (6.22 km) of torque. 5. Remove the select position fixture. 6.
4 - 24 Trimmer Adjustment Procedures Picker Finger Position If the cap frame option is not part of your system, you may refer to the following procedure to center the picker fingers, should it become necessary. If your EMT 10T has the cap frame option, you must give centering priority to the cap frame driver. When the cap frame driver is centered properly, the picker fingers will automatically come into proper center alignment.
Picker Height/Depth Position 4 - 25 Picker Home Position Note: This procedure requires the use of a special service tool: the Melco picker set fixture (p/n 995339-01). 1. Install the picker set fixture (as shown in Figure 4-18) to set the picker home position. Picker Height Position Picker Home Position Front End Bobbin End Picker Fixture Picker Height Position Picker Home Position Figure 2 - 18 2. Loosen the set screw inside the swivel pin body shown in Figure 4-17. 3.
4 - 26 Trimmer Adjustment Procedures Grabber Adjustment The grabber blade travel is adjusted at the transition bracket where the guide rod from grabber drive mechanism is attached with a set screw. 1. Refer to Figure 4-2 and grasp the grabber blade at the location between the top grabber blade cover and the front grabber blade cover where the finger is pointing. Figure 4-19 also shows this area. 2.
Grabber Adjustment 4 - 27 8. Measure the distance from the front of the grabber blade guide to the tip of the grabber blade. The distance should be 2.5 inches +/- 0.10 as shown in Figure 4-19, item X. 9. To adjust for grabber blade position in Step 8, look to the right side of the transition bracket just as it enters into the head casting and locate the small set screw as shown in Figure 4-20.
4 - 28 Under Thread Control (UTC) Replacement Under Thread Control (UTC) Replacement To remove the UTC assembly refer to the steps that follow: 1. With the machine in the head up position, turn the power switch OFF. 2. Remove the table top insert from the machine to access the Hook and UTC area. 3. Remove the needle plate, front bed cover, and right side rotary hook cover to access the UTC assembly including the sensor cable and connection to the harnessing in the bed. 4.
Rotary Hook Retaining Finger Positioning 4 - 29 8. Place the UTC assembly under the needle plate support bracket as shown in Figure 4-22 and install the 2 UTC assembly mounting screws. needle plate support bracket UTC assembly and rotary hook retaining finger UTC assembly mounting screws Figure 4 - 22 9. Perform the UTC adjustments. UTC Adjustments It is very important that you follow these instructions any time the rotary hook or UTC is loosened or moved.
4 - 30 UTC Adjustments 4. Press keys. The head rotates to the ‘‘Head Up’’ position and the LCD displays GO TO HEADUP 110.0. 5. Hold down and press (the display will read NEEDLE DEPTH). 6. Position the head to the "Needle Depth" location. 7. Slightly loosen the 2 UTC assembly mounting screws from under the needle plate support bracket. 8.
Rotary Hook Retaining Finger Positioning gauge finger 4 - 31 UTC COMBINATION GAUGE (p/n# 009027-01) UTC detection arm bottom of gauge UTC detection arm must clear the bottom of the needle plate (represented by the bottom of the gauge) UTC Assembly Figure 4 - 24 13. If the arm touches the gauge, carefully reshape the arm slightly until it clears. 14. Refer to Figure 4-25 and lift the connecting link off of the movable knife assembly.
4 - 32 UTC Adjustments Sew Test We now must actually embroider onto properly hooped material to prove the adjustment is proper. A special design named UTCTEST comes on a disk with your machine. Load the design into your EDS software or disk drive and send it to the sewing peripheral. The primary purpose of the UTC is to signal when the bobbin thread runs out or breaks. The UTC has a mechanical arm that is bumped by the bobbin thread during every stitch.
Sew Test 4 - 33 VIEW from UNDER the UTC ASSEMBLY (assembly shown removed from needle plate support bracket, but is actually attached during this adjustment) slotted screw hole UTC sensor body UTC sensor body screws Figure 4 - 26 B) Check that the UTC does not falsely signal the CHECK BOBBIN message when thread is still on the bobbin. 1. Test for this by simply sewing with the test design.
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Cap Supports 5-1 5. Accessory Adjustments Wide Angle Cap Frame The Wide Angle Cap Frame (also referred to as "WACF") has several adjustable components. Refer to this section for instructions on how to properly adjust these components. Cap Supports cap supports If you are experiencing registration or sew quality problems in parts of your design, you may need to adjust the cap supports (Figure 5-1).
5-2 Wide Angle Cap Frame Cap Support Pads Check the pads under the cap supports regularly (see Figure 5-3). When pads become worn, they must be replaced. Follow these instructions to replace the pads: 1. Remove the old pads. 2. Clean the surface with a solvent such as isopropyl alcohol. 3. Remove the paper from the new pads (provided in the operator kit), exposing the adhesive surface. 4. Attach the new pads to the cap supports, and trim the new pads even with the supports.
Clip Posts 5-3 Spindles On The Clamps The clamps form a positive lock on the frame when it is installed on the driver. The clamps press the spindles against the rollers on the driver to form this lock. If the frame can move when it is installed on the driver, you should adjust the spindles. To adjust the spindle, follow these steps: 1. Loosen the upper nut on the spindle slightly (see Figure 5-7). 2. Move the spindle down until the upper nut contacts the spindle arm. 3.
5-4 Wide Angle Cap Frame Cap Frame The strap on the cap frame may need to be adjusted for different cap materials. The factory adjustment will suffice for most cap types, but if you need to adjust it, follow these steps: locator groove 1. Close the cap frame but do not fasten the latch. Make sure the strap is in the groove on the locator (see Figure 5-9). 2. Loosen the 2 wing nuts on the strap (Figure 5-10). Figure 5 - 9 3.
INDEX INDEX Grounding Strap Use. . . . . . . . . . . . . . . . . 1 - 3 A H Adjustable Fixed Knife Adjustment . . . . . . . . . . . . . . . . . 4 - 16-18 Inspection. . . . . . . . . . . . . . . . . . . 4 - 13-14 Replacement . . . . . . . . . . . . . . . . . . . . 4 - 8 Arm and Bed Assembly . . . . . . . . . . . . . . . 3 - 1 Head Up Position. . . . . . . . . . . . . . . . . . . 4 - 12 Hook Replacement . . . . . . . . . . . . . . . . . 3 - 36 Hook Timing Adjustments Only . . . . . . . .
INDEX Power Distribution Section Voltage Adjustments . . . . . . . . . . . . . . 2 - 8 Module Replacement . . . . . . . . . . . . . . 2 - 8 Presser Foot / Associated Parts Replacing . 3 - 24 R Reciprocator / Needle Bar Guide Shaft . . . Retainer Plate Bearing Adjustment . . . . . . Rotary Hook Replacement . . . . . . . . . . . . . . . . . . . Retaining Finger Positioning . . . . . . . . 3 - 31 3 - 30 3 - 36 4 - 29 S Scope Of Manual . . . . . . . . . . . . . . . . . . . .
