® Industrial 1295 1296 ADJUSTMENT MANUAL This Adjustment Manual is valid for machines from the following serial numbers onwards: # 2 730 099 296-12-18 640/002 Justieranleitung engl. 06.
The reprinting, copying or translation of PFAFF Adjustment Manuals, whether in whole or in part, is only permitted with our previous authorization and with written reference to the source. PFAFF Industriesysteme und Maschinen AG Hans-Geiger-Str.
Contents Contents ............................................................................... Chapter - Page 13 13.01 13.02 13.03 13.04 Adjustment .............................................................................................................. Notes on adjustment ................................................................................................ Tools, gauges and other equipment .......................................................................... Abbreviations .........
Adjustment 13 Adjustment Please observe all notes from Chapter 1 Safety of the instruction manual! In particular care must be taken to see that all protective devices are refitted properly after adjustment, see Chapter 1.
Adjustment 13.05 Adjusting the basic machine 13.05.01 Position of the bottom feed dog crosswise to sewing direction Requirement The bottom feed dog must be the same distance from the left and right side of the feed slots. 4 1 X 3 2 X 1 4 Fig. 11 - 01 ● Loosen screws 1 and 2. ● Position rock shaft 3 according to Requirement.. ● Tighten screw 1. The flats of pins 4 must face screws 1 and rock shaft 3 must neither have any play nor bind. Leave screws 2 loose for the following adjustments.
Adjustment 13.05.02 Adjusting the bottom feed dog in sewing direction Requirement With the longest stitch length set, the bottom feed dog must not strike the feed slot at the front or rear end of its stroke. 1 2 Fig. 11 - 02 ● Set the longest stitch length. ● Turn rock shaft 1 according to Requirement. and tighten screws 2.
Adjustment Bottom feed dog height Requirement With the stitch length set at "0" the feed dog must protrude from the needle plate by the height of its teeth when at its highest position. 2 tooth height 13.05.03 1 Fig. 11 - 03 ● Set stitch length „0“. ● Turn the balance wheel to set the bottom feed dog at its highest position. ● Adjust bracket 1 (screws 2) according to Requirement. On machines without bottom-feed lifting phase (without "P") the feed dog height may be reduced somewhat if necessary.
Adjustment 13.05.04 Needle height (preliminary adjustment) Requirement With the needle bar at b.d.c. the clearance between needle bar and needle plate must be 15 mm. 2 1 15 mm 1 Fig. 11 - 04 ● Re-position the height of needle bar 1 (screws 2) according to Requirement, but do not turn it.
Adjustment 13.05.05 Needle in needle-hole centre Requirement With the stitch length set at "0" the needle must enter exactly in the centre of the needle hole. 4 3 0 1 2 3 7 6 5 8 9 1 2 Fig. 11 - 05 ● ● ● ● ● ● ● Remove vibrating presser 1 and lifting presser 2. Set the stitch length at "0" and set the needle bar at t.d.c. Insert a new needle, loosen screws 3, 4, 5 and 6. Turn the balance wheel to set the needle immediately above the bottom feed dog.
Adjustment 13.05.06 Bottom feed dog lifting motion Requirement 1. With the needle bar at b.d.c. the feed dog must be at its highest position. 2. When the longest stitch length is set and the balance wheel is turned, the bottom feed dog must reach the top side of the needle plate at the same time as the needle. 1 2 Fig. 11 - 06 This adjustment does not apply to machines without bottom-feed dog lifting phase (without "P") ● Set needle bar at b.d.c.
Adjustment 13.05.07 Feeding stroke of bottom and top feeds Requirement With the longest stitch length set and the needle bar at b.d.c. neither the top- nor bottom feed must make any movement when the reverse-feed lever is operated. 2 1 Fig. 11 - 07 ● ● ● ● ● ● Set the longest stitch length. Undo screw 1 enough to allow eccentric 2 to be turned on the shaft against a resistance. Set needle bar at b.d.c. First turn eccentric 2 so that its highest eccentric point is facing "downwards.
Adjustment 13.05.08 Hook clearance, needle rise, needle height and needle guard Requirement With the stitch length set at "3" and in needle-rise position (= 1.8 mm past b.d.c. on version "B" or 2.0 mm past b.d.c. on version "C") 1. The hook point must be at the "needle centre" and the clearance between hook and needle 0.05 to 0.1 mm, 2. the top end of the needle eye must be 0.8 to 0.1 mm below the hook point, and 3. needle guard 8 must touch the needle just lightly. 0.05 - 0.
Adjustment ● Set the hook point at the needle centre, making sure that the needle is not deflected by needle guard 8. ● Making sure that bevel gear 6 is not too close, but the hook has not too much play, tighten screws 2. ● Move fixing collar 7 up against bevel gear 6 and tighten screws 3. ● Adjust the needle height according to Requirement 2 (see also Chapter 13.04.04, Needle height preliminary adjustment). ● position needle guard 8 according to Requirement 3.
Adjustment 13.05.09 Top feed stroke Requirement With the longest top feed stroke set and the stitch length at "0", lifting presser 1 and vibrating presser 2 must each rise from the needle plate by 7.0 mm when the balance wheel is turned. 4 7 mm 3 1 7 mm 2 Fig. 11 - 09 ● Set the longest top feed stroke and stitch length "0". ● Lower lifting presser 1. ● Turn the balance wheel in sewing direction until vibrating presser 2 has reached its highest point.
Adjustment 13.05.10 Top feed lifting motion Requirement When lifting presser 1 is resting on the needle plate, vibrating presser 4 and needle point 5 must reach the needle plate at the same time at the highest top feed stroke. 3 2 5 1 4 Fig. 11 - 10 ● Lower lifting presser 1 onto the needle plate. ● Loosen screws 2 just enough to allow eccentric 3 to be turned against a resistance on it shaft. ● Turn eccentric 3 according to Requirement. ● Tighten screws 2.
Adjustment 13.05.11 Bobbin case opener Requirement The needle thread must neither be trapped between bobbin case opener 3 and hook base 4 nor between position finger 5 and the retainer on the needle plate (see arrows). 2 6 5 1 3 4 Fig. 11 - 11 ● Undscrew and remove post covers 1 (on left post from the rear). ● Undo screws 2 enough to allow bobbin case opener 3 to be turned on its shaft against a resistance. ● Thread up the machine, place sewing material in and lower the lifting presser.
Adjustment 13.05.12 Slip coupling Slip coupling 4 is adjusted at the works. When a thread jams, slip coupling 4 disengages, in order to avoid damage to the hooks. To engage the coupling again, proceed as follows. 1 2 4 3 4 Fig. 11 - 12 ● Remove jammed thread. ● Press plunger 1 and turn the balance wheel until pawl 2 engages groove 3.
Adjustment 13.05.13 Needle-thread tension release Requirement With the lifting presser raised, there must be a clearance of at least 0.5 mm between tension discs 4. 2 0.5 mm 1 3 4 Fig. 11 - 13 ● Position pressure plate 1 behind mounting bracket 2 according to Requirement. The clearance of 0.5 mm is a miminum setting and may be as much as 1 mm for heavy threads. When the tension is engaged, release pin 3 must not be under load.
Adjustment Thread check spring, without subclass -900/56 Requirement The movement of thread check spring 5 must be finished when the needle pointe enters the material (=spring stroke of about 7 mm). 7 mm 13.05.14 5 1 3 2 4 Fig. 11 - 14 ● Adjust stop 1 (screw 2) according to Requirement. ● To adjust the pressure of the spring, turn screw 3 (screw 4). For technical reasons the length of the thread check spring stroke may vary upwards or downwards a little.
Adjustment 13.05.15 Thread check spring on the PFAFF 1296 with subclass -900/56 Requirement The movements of thread check springs 1 and 6 must be finished when the needle points enter the material (=spring stroke of about 7 mm). 8 10 5 6 7 mm 1 4 2 9 7 3 Fig. 11 - 15 ● ● ● ● To adjust the pressure of spring 1, turn screw 2 (screw 3). Adjust stop 4 (screw 5) according to Requirement. To adjust the pressure of spring 6, turn screw 7 (screw 8). Adjust stop 9 (screw 10) according to Requirement.
Adjustment Bobbin winder Requirement 1. With the bobbin winder engaged, drive wheel 1 must be driven reliably. 2. With the bobbin winder disengaged, friction wheel 5 must not run against drive wheel 1. 3. The bobbind winder must switch itself off when the filled thread is about 1 mm from the rim of the bobbin. 1 5 2 4 1 mm 13.05.16 3 Fig. 11 - 16 ● Re-position drive wheel 1 (screws 2) according to Requirements 1 and 2. ● Re-position pin 3 (screw 4) according to Requirement 3.
Adjustment 13.05.17 Pressure of the lifting presser Requirement 1. The material must be properly fed, even at the highest sewing speed. 2. There must be no pressure marks on the material. 1 Fig. 11 - 17 ● Turn screw 1 according to the Requirement.
Adjustment 13.06 Adjusting the thread trimmer -900/56 13.06.01 Engaging solenoid Requirement 1. Mounting bracket 1 must be in the middle of its adjusting range and parallel with the right-hand edge of the mounting bracket. 2. When the thread trimmer is in its resting position the core of solenoid 3 must protrude from the solenoid housing by about 4 mm. 4 mm 4 3 1 2 Fig. 11 - 18 ● Re-position bracket 1 (screw 2) according to Requirement 1.
Adjustment 13.06.02 Control cam (preliminary adjustment) Requirement 1. Control cam 1, must be centred with the cutout of bearing mounting 5. 2. With the needle bar at t.d.c., screws 2 must be visible from the front and aligined parallel with the bedplate. 2 4 4 3 3 1 5 Fig. 11 - 19 ● Re-position control cam 1 (screws 2) and fixing collars 3 (screws 4) according to Requirement.
Adjustment 13.06.03 Control lever spring action Requirement When the thread trimmer is in its resting position, it must be possible to press control lever 3 about 1 mm towards the bedplate (spring action). 2 3 1 Fig. 11 - 20 ● Turn screw 1 (nut 2) according to Requirement.
Adjustment 13.06.04 Control lever stroke Requirement 1. When engaging lever 5 is operated the pin of control lever 6 must drop freely into the track of control cam 7. 2. After thread trimming, control lever 6 must pass freely on the right side of stop plate 3 and engage control lever 5 behind stop plate 3. 3. There must be a clearance of 0.2 mm between the pin of control cam 6 and the righthand inside of the control cam track. 0.2 mm 4 5 2 3 6 1 7 Fig.
Adjustment 13.06.05 Thread-trimmer drive linkage Requirement 1. On the PFAFF 1296 thread-catcher drive linkage 1 must have a length of 128 mm, less half of the needle gauge. On the PFAFF 1295, thread catcher drive linkage 1 must have a length of 128 mm 2. When the threa trimmer is in its resting position there must be a clearance of about 1 mm between plunger 5 and lever 6. 128 mm 2 1 2 6 1 mm 5 3 4 Fig.
Adjustment 13.06.06 Linkage bar (only on the PFAFF 1296) Requirement The length of linkage bar 1 must be the same as the distance between the two threadcatcher drive shafts 3. = 3 3 1 2 = 2 Fig. 11 - 23 ● Adjust middle section 1 (nuts 2) of the linkage bar according to Requirement.
Adjustment Thread catcher height Requirement There must be a clearance of 0.7 mm between the underside of thread catcher 4 and bobbin case cap 5. 0.7 mm 13.06.07 4 4 5 2 3 1 Fig. 11 - 24 ● Loosen screws 1 and 2. ● Adjust the height of shaft 3 according to Requirement. ● Tighten screws 1. Leave screws 2 loose for the following adjustment.
Adjustment 13.06.08 Thread catcher resting position Requirement When the thread trimmer is in its resting poistion there must be a clearance of about 4 mm between the point of catcher 3 and the cutting edge of knife 4. 4 mm 3 3 4 1 2 Fig. 11 - 25 ● Turn shaft 2 according to Requirement. ● Tighten screws 1. When tightening screws 1 make sure that all transmission parts of the thread catcher drive can move freely.
Adjustment 13.06.09 Knife pressure Requirement When the front edge of thread catcher 3 has passed the knife cutting edge by half, knife 1 must rest with light pressure on the edge of the catcher. 3 2 3 1 Fig.
Adjustment 13.06.10 Bobbin thread trapping spring Requirement 1. Bobbin thread trapping spring 3 must not be deflected by thread catcher 4 in any phase. 2. After the trimming action the bobbin thread must be securely trapped. 3. It must be possible to insert and remove the bobbin from the hook without any hindrance. 3 1 4 4 3 2 Fig. 11 - 27 ● Re-position bracket 1 (screws 2) according to Requirements 1 and 3. ● Bend trapping spring 3 according to Requirement 2.
Adjustment 13.06.11 Control cam (final adjustment) Requirement The trimming action must be just completed when the take-up lever is at t.d.c. 2 1 Fig. 11 - 28 ● Turn control cam 1 (screws 2) according to Requirement.
Adjustment 13.06.12 Release lever Requirement When the pin of control lever 3 has dropped into the track of control cam 4 and the needle bar is at b.d.c. there must be a clearance of about 1 mm between control lever 3 and release lever 5. In this position the needle thread tension must still be engaged. 4 2 5 3 1m m 1 Fig.
Adjustment 13.06.13 Release rod Requirement 1. When the lifting presser is resting on the needle plate, pin 3 must rest at the lower end of the elongated hole in pull-rod 1. 2. The tension discs must not be moved apart in this position. 2 1 3 1 Fig. 11 - 30 ● Re-position pull-rod 1 (screws 2) according to Requirement.
Adjustment 13.07 Parameter settings (only on machines with Quick-EcoDrive and control unit P40ED) ● The selection of the user level and the alteration of parameters is described in the separate instruction manual for the drive unit. Parameter User lever Setting range Set value Description Parameter list Group 13.07.01 1 105 Speed for start backtack B, C 300 - 2000 600 110 Speed for end backtack B, C 300 - 2000 800 607 Speed max.
Rotating direction of the motor 884 Proportional sensitivity of the speed control unit 1295 1296 9 897 Variant mini-motor, 1 = long, 2 = short 900 Additional P- sensitivity of the speed control unit Set value 800 Setting range Parameter 8 User lever Group Description Adjustment C 0-1 1 B,C 03 - 24 12 B,C 03 - 24 12 B,C 03 - 24 16 C 0-1 1 B,C 1 - 24 10 Further parameters and the description for an internet update of the machine software and reset /cold start of the machine
Circuit diagrams 14.03 Circuit diagrams Reference list for the Circuit diagrams 14 - 1 A1 Control unit Quick P40 ED A2 Control panel BDF S2 A14 Sewing head recognition system (OTE) H1 Sewing lamp (optional) H10 LED stitch counter M1 Sewing motor Q1 Main switch S1 Manual backtacking key S1.1 Pedal speed control unit S2 S3 Needle position change key Single stitch key S6 Start inhibitor (E6 stop) X0 PC-interface (RS 232) X1 Motor X2 Incremental transducer X2.1 X2.
91-191 502-95 Page 1 Version 07.07.
Circuit diagram 14 - 3 Version 07.07.
91-191 502-95 Page 3 Version 07.07.
PFAFF Industriesysteme und Maschinen AG Hans-Geiger-Str. 12 - IG Nord D-67661 Kaiserslautern Phone: Fax: E-mail: +49 - 631 200-0 +49 - 631 17202 info@pfaff-industrial.