BAS-761 INSTRUCTION MANUAL Please read this manual before using the machine. Please keep this manual within easy reach for quick reference.
Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instructions below and the explanations given in the instruction manual. With industrial sewing machines, it is normal to carry out work while positioned directly in front of moving parts such as the needle and thread take-up lever, and consequently there is always a danger of injury that can be caused by there parts.
x Notes on safety DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury. CAUTION Environmental requirements Use the sewing machine in an area which is free from sources of strong electrical noise such as high-frequency welders. Sources of strong electrical noise may cause problems with correct operation.
CAUTION Installation Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhoea. Keep the oil out of the reach of children. Machine installation should only be carried out by a qualified technician.
CAUTION Cleaning Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhoea. Keep the oil out of the reach of children.
c Warning labels ★ The following warning labels appear on the sewing machine. Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer. 1 3 Direction of operation Moving parts may cause injury. Operate with safety devices. Turn off main switch before changing needle, cleaning etc. Safety devices: Thread take-up cover, Guard bar, Belt cover, etc.
CONTENTS 1. Names of Machine Components .............................................................................................................. 1 2. Specifications ............................................................................................................................................. 2 3. Installation .................................................................................................................................................. 3-1.
1. Names of Machine Components 1.
2. Specifications 2. Specifications Applicable machine type Lock stitch and special cross stitch sewing machine with automatic thread trimmer Use Sewing pockets on the various types of jeans Cycle time 9 seconds approx.
3. Installation 3. Installation CAUTION Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhoea. Keep the oil out of the reach of children. Machine installation should only be carried out by a qualified technician.
3. Installation 3-2.Removal of the fixing bolts from the machine The machine head and the sewing clamp arm are fixed with bolts to secure them during transportation. q Remove fixing bolt q on the machine head through the hole in the front cover. Note: ¡ Save removed fixing bolts q future use. ¡ Before transporting the machine be sure to secure it with the fixing bolts. 3-3. Installation of the spool stand Install the spool stand as shown in the illustration at left.
3. Installation 3-4. Connection of the foot-switch connector Connect connector q securely. q 3-5. Connection of the air hose 1. Attach air hose q to air unit valve w. 2. Move the upper cap of air unit valve w upward and adjust the air pressure to 0.49 MPa. 3. After adjustment, move the cap downward and lock. 1. Loosen bolts q and position front supporter w in the most appropriate position. 2. Tighten bolts q to secure the supporter w. w q 3-6.
3. Installation 3-7. Installation positions for operation box and switch box Loosen the mounting bolts e for the operation box q and switch box w, and move them in the direction of the arrow to a position where they are comfortable to operate.
3. Installation 3-8. Installation of the folding group assembly Before installation ¡ Apply air pressure. ¡ Turn on power switch q to return the machine to the home position. ¡ Turn valve switch w to OFF (lower) side and "E-820" will flash on the display. o e i y u !4 !3 !2 !1 t w r !0 @1 q 1. Install folding clamp assembly e onto folding base r. 2. Attach multi-connector t. 3.
4. Lubrication 4. Lubrication Note: Check for sufficient oil through oil gauge windows A and B on the machine head and the table. If the oil amount is not sufficient, be sure to replenish it. How to oil the machine head Replenish the oil through oil port q. How to oil the machine table 1 Move the machine head forward so that the lubrication hole e in the needle plate bracket RR w and the lubrication port r in the machine bed are aligned.
5. Correct operation 5. Correct operation 5-1. Installing the needle Fully insert needle q, with its long groove to the left, and secure it with screw w. Note: If the angle is incorrect, the needle an rotary hook will lock when the needle bar is at its lowest position, so make sure that the needle and rotary hook do not lock. w q 5-2. Upper threading 1. Apply air pressure and turn on power switch. 2. Press the FOLDER RESET button !9 to move the machine head back to the home position. 3.
5. Correct operation 5-3. Bobbin case threading ■ Removal of the bobbin case @0 !4 @1 1. Press BOBBIN CHANGE button !4 and the machine will move toward you and stop; 2. Take out bobbin case q. Replace the bobbin. 3. If the RESTART buttones @0 are pressed after the RESET button @1 has been pressed, the machine head will move back to the home position. q ■ Removal of the bobbin ■ x2.4 rotary hook Bobbin w can be removed when the latch is released. ■ x1.
5. Correct operation 5-4. Bobbin thread winding e w q 1. Pass the bobbin thread from the spool stand as illustrated below. 2. Wind the thread around the bobbin q as arrwed. 3. Press lever w against the bobbin q. 4. After completing bobbin q thread winding, cut the thread. Note: Check for any idle rotation of the bobbin q. The motor may overheat, if the bobbin q idles for a long time or if it rotates without a bobbin.
5. Correct operation 5-5. Thread tension q r ■ x2.4 rotary hook Stitches when upper thread tension is too low e Stitches when upper thread tension is too high Correct stitches ■ x2.4 rotary hook ■ x1.7 rotary hook w w Low Low ■ x1.7 rotary hook e High High 1. When the thread take-up lever is in the highest position after thread trimming, adjust the upper thread beyond the needle eye so as it is 30 to 40 mm long, by turning tension nut q. (30 - 70 g is standard). 2.
6. Button functions 6. Button functions 6-1. Operation box panel buttones q w y e r t q LCD screen Displays sewing information and error messages. w FOLDING MODE button This button is used to change the operating mode of the folder. Folder operating modes include automatic mode, pattern matching mode, label attachment mode and step mode.
6. Button functions o !2 u !0 !3 i !1 u SEWING SPEED button This button is used to set the sewing speed and bar tacking speed. The sewing speed can be set in 9 steps from 500 to 4,250 rpm, and the bar tacking speed can be set in 7 steps from 500 to 3,500 rpm. i COUNTER button This button is used to set the lower thread counter, piece counter decrement (cleared when 0), stacker roller feed amount, date and time. The setting item changes each time this button is pressed.
6. Button functions !7 !5 !8 !6 !4 !4 BOBBIN CHANGE button If this button is pressed when changing the bobbin, the machine head can be moved forward to make bobbin changing easier. !5 CANCEL button If this button is pressed during folder mode setting, while data is being saved to or read from a floppy disk, while the sewing speed is being set or if the COUNTER button is being used to change a setting, the setting changes or operations will be canceled and the setting mode will be exited.
6. Button functions 6-2. Switch box panel buttones !9 @0 @1 @2 !9 FOLDER RESET button (carries out positioning when the power is turned on) This button is used to stop the folder while folding is in progress and to reset he folding condition. When the button is pressed once, folding is stopped, and when it is pressed twice, the folder is reset, and the workpiece and the pocket can then be set.
6. Button functions 6-3. Foot switch @3 Foot switch @3 When the folder is in automatic mode, this switch is used to operate the vacuum system. When the folder is in pattern matching mode, this switch is used to raise and lower the folder table to carry out pattern matching. When the folder is in label attachment mode, this switch is used to carry out label attaching.
7. Settings before sewing 7. Settings before sewing Press FOLDER RESET SW to start searching for home position. 1. Turn on the air pressure and then turn on the power switch. The screen shown at left will be displayed on the panel. 2. Press the FOLDER RESET button !9. The machine head will move to the home position and then stop in the standby condition. 1. Press the FOLDING MODE button w. Screen 1 will then be displayed. 2. Press the arrow keys !8 to select the mode. 7-1.
7. Settings before sewing * If the SEWING SPEED button u is pressed once more, the sewing speed will not be changed, and screen 2-2 for changing the bar tacking speed will be displayed. Change tack speed. TACK SPEED 3000 rpm Screen 2-2 3. Press the ENTER button !6. The sewing speed will be changed to the new setting, and screen 2-2 for changing the bar tacking speed will be displayed. 4. Press the arrow keys !8 to select the desired bar tacking speed.
7. Settings before sewing 7-3. Setting the lower thread counter ¡ The lower thread counter determines how many workpieces can be produced according to the amount of lower thread which has been wound inside the bobbin case. ¡ This setting can be made when the machine head is at the standby position and while the bobbin is being replaced. Change bobbin counter. BOBBIN COUNTER Screen 3 1. Press the COUNTER button i once. Screen 3 will then be displayed. 2.
7. Settings before sewing 7-4. Setting the piece counter ¡ This setting can be made when the machine head is at the standby position and while the bobbin is being replaced. ¡ The piece counter can be set to "0" (reset), or it can be decremented by 1, It cannot be incremented. Change piece counter. PIECE COUNTER 1. Press the COUNTER button i twice. Screen 4 will then be displayed. 2. Press the FAST button !3 to reset the piece counter to "0".
7. Settings before sewing 7-6. Setting the date and time This setting can be made when the machine head is at the standby position and while the bobbin is being replaced. Change date. DATE 1. Press the COUNTER button i four times. Screen 6-1 will then be displayed. 2. Press the [ ] and [ ] arrow keys !8 to select the year, month or day, and press the [ ] and [ ] arrow keys !8 to change the setting for the selected item.
8. Preparation for sewing 8. Preparation for sewing Press FOLDER RESET SW 1. Apply air pressure and turn on power switch. Screen 7 will then be displayed on the panel. to start searching for home position. 2. Press the FOLDER RESET button !9. The machine head will move to the home position and then stop in the standby condition. 3. Select the normal display screen. The screen displayed will change in the following order each time the arrow key !8 is pressed. Screen 8-1→ screen 8-2→ ...
8. Preparation for sewing 4. Insert a floppy disk. Note: Insert a floppy disk straight into the slot. The label side of the disk must face the front. 5. Press the FLOPPY button y. Screen 9 will then be displayed. Read sewing data. PROGRAM NUMBER Use the arrow keys !8 to select the same number as the work clamp assembly. Then use the [ ] and [ ] arrow keys !8 to select the column, and use the [ ] and [ ] arrow keys !8 to change the values.
9. Sewing 9. Sewing 9-1. Sewing with the folder in automatic mode w r e q @3 @4 1. Turn on the air pressure and then turn on the power switch. The following screen will be displayed on the panel. Press FOLDER RESET SW to start searching for home position. 2. Press the FOLDER RESET button !9. The machine head will move to the home position and then stop in the standby condition. 3. Set the folder mode to automatic mode. NOTE: Refer to page 18 for details on how to set the folder mode. 4.
9. Sewing 9-2. Sewing with the folder in pattern matching mode r w e q @3 @4 1. Turn on the air pressure and then turn on the power switch. The following screen will be displayed on the panel. Press FOLDER RESET SW to start searching for home position. 2. Press the FOLDER RESET button !9. The machine head will move to the home position and then stop in the standby condition. 3. Set the folder mode to pattern matching mode. NOTE: Refer to page 18 for details on how to set the folder mode. 4.
9. Sewing 9-3. Sewing with the folder in label attachment mode ¡ Two types of label attachment mode can be used: when DIP switch D-2 is set to OFF, alternate label attachment is carried out, and when DIP switch D-2 is set to ON, continuous label attachment is carried out. ¡ With alternate label attachment, the folder switches alternately between label attachment mode and automatic mode once for each sewing operation. During label attachment mode, the LABEL indicator e illuminates.
9. Sewing 9-4. Sewing with the folder in step mode ¡ In step mode, the folder operates in a step-by-step manner, so that checking can be carried out during folding. ¡ If he LABEL indicator e is switched off, automatic mode is followed during step mode operation. If the LABEL indicator e is illuminated, label attachment mode is followed. NOTE: Selecting the mode to be followed is carried out by using the LABEL button e. Press FOLDER RESET SW to start searching for home position. q 1.
9. Sewing 9-5. Test feeding Test feeding should always be carried out a new program is created or when changes are made to existing data. NOTE: Check that the needle does not touch the work clamp. 1. Carry out the sewing preparation as far as step 6. 2. Press the TEST button !2 and check that the TEST indicator is illuminated. 3. Operate the folder in the same way as for normal sewing. The folder can be set to any mode. 4.
9. Sewing 9-6. Emergency stop To stop the machine during sewing If you would like to stop the machine head during sewing, press the EMERGENCY STOP button @2. The machine head will stop and the error message "E-801" will appear on the panel screen. If the RESET button @1 is then pressed, the thread will be trimmed and the screen will return to the normal display. To continue sewing 1. Press the STEP BACK button !0 to return to the place from where you would like sewing to resume. 2.
10. Adjustments 10. Adjustments CAUTION Maintenance and inspection of the sewing machine should only be carried out by a qualified technician. Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system. Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the foot switch is depressed by mistake, which could result in injury.
10. Adjustments 10-2. Needle and rotary hook timing ■ x1.7 rotary hook q e w 0 – 0.05mm • for x1.7 rotary hook 1.8mm • for x2.4 rotary hook 2.4mm Gauge r 2 76 1 1.7 • for x1.7 rotary hook 1.8mm • for x2.4 rotary hook 1.2mm 1 BA S ¡ After needle-bar q is raised from its lowest position, rotary hook point w must be aligned with the center of needle e when the lower end of needle-bar q is matched the end of gauge 2.
10. Adjustments 10-4. Removal of the fixed knife and the movable knife Note: Turn off the power switch. ■ Removal of the fixed knife Notch q w Belows rail r e u r t i y 1. Remove flat-head screws q and then needle plate RR w and needle plate RL e. 2. Remove clamping screws r and then tilt the machine head. NOTE: At this time, adjust the position of the machine head so that it is aligned with the notch in the bellows rail. 3. Remove clamping bolt t and then bobbin case holder position bracket y.
10. Adjustments 10-5. Stacker position adjustment 1. Loosen the four bolts w and adjust the height of the stacker base q so that the workpieces stack neatly onto the stacker base q. 2. Loosen the two bolts e, and then adjust the vertical position of the stacker base q so that the workpieces stack neatly onto the stacker base q. 3. Loosen the bolt r and adjust the height of the inner work clamp bart. 4. Loosen the bolt y and adjust the height of the outer work clamp baru.
10. Adjustments 10-6. Sewing clamp assembly number selection Clamping screw 3 ⳯ 5 Spring washer Slit D Slit C Sewing clamp assembly ¡ Attach slit C and Slit D to the sewing clamp assembly by a clamping screw and a spring washer. See the table below for the sewing clamp assembly numbers. ■ Sewing clamp assembly number NOTE: ¡ For retractable clamps, set jumpers 0 to 31. ¡ For single clamps, set jumpers 32 to 63.
11. Using the DIP switches 11. Using the DIP switches DANGER Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the face plate of the control box. Touching areas where high voltages are present can result in severe injury. Note: ¡ Always be sure to turn the power OFF when changing the settings of the DIP switches. ¡ The functions of the DIP switches are subject to changes without notification.
11. Using the DIP switches ¡ DIP switch C No. Functions when ON 1 7 stitches counted before upper thread breakage is detected OFF: 3 stitches counted before upper thread breakage is detected 2 After sewing, the work clamp and machine head return to the previous standby position, even if folding has been completed. 3 Movement to the feed destination occurs immediately when the program data requires it. 4 After sewing, the timer starts 0.2 seconds after the work clamp is raised.
12. Table of error code 12. Table of error code ¡ If an error occurs which cannot be reset, turn off the power momentarily and eliminate the cause of the problem. ¡ If an error occurs which can be reset, eliminate the cause of the problem and then press the RESET button.
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INSTRUCTION MANUAL BROTHER INDUSTRIES, LTD. 15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan. Phone: 81-52-824-2177 Printed in Japan 151-761 S93761-102 2000.09.
