Pfaff Industrial 1295 Guide

1295
1296
296-12-19 310/002
Adjustment manual engl. 10.15
This adjustment manual applies to machines
from the serial number 7262 456 and software
version 0435/002 onwards.
ADJUSTMENT MANUAL

Reprinting, reproduction and/or translation of PFAFF adjustment manuals
(including parts thereof) is only permitted with our prior agreement and
citation of the source.
PFAFF Industriesysteme
und Maschinen GmbH
Hans-Geiger-Str. 12 - IG Nord
D-67661 Kaiserslautern

Table of Contents
Contents ..................................................................................Page
13 Adjustment ........................................................................................................................... 5
13.01 Tools, gauges and other accessories .................................................................................... 5
13.02 Abbreviations ......................................................................................................................... 5
13.03 Explanation of symbols.......................................................................................................... 5
13.04 Adjusting basic machine ........................................................................................................ 6
13.04.01 Feed dog position crossways to sewing direction................................................................. 6
13.04.02 Feed dog position in sewing direction ................................................................................... 7
13.04.03 Feed dog height..................................................................................................................... 8
13.04.04 Needle position to needle hole .............................................................................................. 9
13.04.05 Needle height (pre-calibrating) ............................................................................................. 10
13.04.06 Bottom and top feed sliding movement .............................................................................. 11
13.04.07 Bottom transporter stroke movement (only in machine versions with a P)........................ 12
13.04.08 Hook-to-needle clearance, needle bar rise, needle height and needle guard ...................... 13
13.04.09 Top feed lift.......................................................................................................................... 14
13.04.10 Top feed stroke movement ................................................................................................. 15
13.04.11 Bobbin case opener ............................................................................................................. 16
13.04.12 Safety clutch ........................................................................................................................ 17
13.04.13 Needle thread tension release............................................................................................. 18
13.04.14 Thread check spring (with the PFAFF 1295 and 1296 without thread trimmer -900/56) ..... 19
13.04.15 Thread check spring (with the PFAFF 1296 with thread trimmer -900/56) .......................... 20
13.04.16 Bobbin winder...................................................................................................................... 21
13.04.17 Presser foot pressure .......................................................................................................... 22
13.05 Adjusting thread trimmer -900/56 .................................................................................... 23
13.05.01 Engaging solenoid................................................................................................................ 23
13.05.02 Control cam (pre-calibrating) ................................................................................................ 24
13.05.03 Tripping lever spring mechanism......................................................................................... 25

Table of Contents
Contents ..................................................................................Page
13.05.04 Tripping lever path ............................................................................................................... 26
13.05.05 Thread catcher drive rod ...................................................................................................... 27
13.05.06 Connecting rod (on with the PFAFF 1296) ........................................................................... 28
13.05.07 Thread catcher height .......................................................................................................... 29
13.05.08 Thread catcher neutral position ........................................................................................... 30
13.05.09 Knife pressure...................................................................................................................... 31
13.05.10 Bobbin thread clamp spring ................................................................................................. 32
13.05.11 Control cam (pre-calibrating) ................................................................................................ 33
13.05.12 Release lever ....................................................................................................................... 34
13.05.13 Release rod.......................................................................................................................... 35
13.06 Adjusting lifting lever with subclass -911/97 ....................................................................... 36
13.07 Adjusting lifting lever without subclass -911/97 .................................................................. 37
13.08 Parameter settings ............................................................................................................. 38
13.09 Internet update of control P40 CD....................................................................................... 38
14 Circuit Diagrams ................................................................................................................ 39

Adjustment
5
13 Adjustment
The illustrations in this chapter show the PFAFF 1296 two-needle sewing ma-
chine.
Various settings must be carried out only on one side with the PFAFF 1295 sin-
gle-needle sewing machine, i.e. in the right hook area. An indication is given in
the respective chapters.
Observe and comply with all instructions in the operating manual´s chapter
1 Safety! In particular make sure that all safety covers are installed again
correctly after making adjustments, see chapter 1.06 Operating manual
hazard information!
Unless otherwise stated, the machine must be disconnected from the power
supply before all adjustment work!
Risk of injury due to accidental machine start-up!
Notes on adjustment
All adjustments in this manual are based on a fully assembled machine and may only be
carried out by technical staff trained for this purpose. Machine covers, which have to be
removed and replaced to carry out checks and adjustments, are not mentioned in the text.
The order of the following chapters corresponds to the most logical work sequence for
machines that have to be completely adjusted. Both the preceding and following chapters
must be observed if only specific individual work steps are carried out. Screws and nuts
indicated in brackets ( ) are fastenings for machine parts, which must be loosened before
any adjustment and tightened again afterwards.
13.01 Tools, gauges and other accessories
O1 set of screwdrivers with knife widths from 2 to 10 mm
O1 set of wrenches with jaw widths from 7 to 14 mm
O1 set of Allen keys from 2 to 6 mm
O1 metal ruler (order no. 08-880 218-00)
ONeedle rise gauge (order no. 61-111 600-01)
OScrew clamp (order no. 61-111 600-35)
OTop feed lift gauge (order no. 61-111 633-61).
13.02 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
13.03 Explanation of symbols
Activities to be performed or important information in this adjustment manual are
emphasised by symbols. The symbols used have the following meaning:
Note, information
Maintenance, repairs, adjustment, service work
(only to be carried out by technical staff)

Adjustment
6
Fig. 13 - 01
21
13.04 Adjusting basic machine
13.04.01 Feed dog position crossways to sewing direction
Rule
The bottom transporter should have the same clearance on the right and left in the nee-
dle plate cutout.
OLoosen both of the screws 1 and 2.
OAdjust the rock shaft 3 according to rule 1.
OTighten the screws 1
The surfaces of the tacks 4 must face the screws 1 and the rock shaft 3 must
have no backlash nor move sluggishly.
OThe screws 2 remain loosened for the subsequent adjustments.
4
3
1
4

Adjustment
7
Fig. 13 - 02
13.04.02 Feed dog position in sewing direction
Rule
The bottom transporter may not abut the needle plate cutout in its front and rear turning
point with maximum stitch length regulation.
OSet the maximum stitch length.
OTurn the rock shaft 1 according to the rule and tighten the screws 2.
2
1

Adjustment
8
13.04.03 Feed dog height
Rule
The bottom transporter should protrude above the needle plate by the tooth height in its
upper turning point at stitch length regulation "0".
Fig. 13 - 03
OSet the stitch length to "0".
OMove the feed dog to its upper turning point by turning the handwheel.
OAdjust the bracket 1 (screws 2)according to the rule.
The feed dog height can be reduced slightly if required in machines without a
bottom feed lifting stage (without P).
1
2

Adjustment
9
Fig. 13 - 04
13.04.04 Needle position to needle hole
Rule
The needle should pierce the middle of the needle hole exactly
(with stitch length regulation "0").
OUnscrew the top feed foot 1 and the presser foot 2.
OSet the stitch length to "0" and move the needle bar to t.d.c.
OInsert a new needle, loosen the screws 3, 4, 5 and 6.
OMove the needle directly over the needle hole by turning the handwheel.
OMove the needle bar frame 7 according to the rule.
OTighten the screws 3, 4 and 5.
OMove the stop 8 so that it touches the needle bar frame 7 and tighten the screws 6.
The needle bar frame 7 in the guide 9 and the top feed drive rods should move
easily.
1
2
3
0
4
7
6
8
1
2
9
5
3

Adjustment
10
Fig. 13 - 05
13.04.05 Needle height (pre-calibrating)
Rule
When the needle bar is in b.d.c., the clearance between the needle bar and needle plate
should be 15 mm.
OAdjust the needle bar 1 (screw 2)without twisting according to the rule.
1
2
1
15 mm

Adjustment
11
13.04.06 Bottom and top feed sliding movement
Rule
The top and bottom feed should not move when the reverse-feed lever is activated with
maximum stitch length regulation and when the needle bar is in b.d.c.
OSet the maximum stitch length.
OLoosen the screws 1 only to such an extent that the eccentric 2 is difficult to turn on the
shaft.
OMove the needle bar to b.d.c.
OInitially turn the eccentric 2 so that its largest eccentricity is in the "bottom" position.
Now turn it a little further in the direction of rotation according to the rule.
OTighten the screws 1.
Fig. 13 - 06
1
2

Adjustment
12
13.04.07 Bottom transporter stroke movement (only in machine versions with a P)
Rule
1. The bottom transporter should be in its upper turning point when the needle bar is in
b.d.c.
2. The bottom transporter and needle point should reach the surface of the needle plate at
the same time with maximum stitch length regulation and when turning the handwheel.
2
1
Fig. 13 - 07
OMove the needle bar to b.d.c.
OTurn the eccentric 1 (screws 2)according to rule 1.
OTighten the accessible screw 2 in this position so that the eccentric 1 is still difficult to
turn.
OTurn the eccentric 1 a little further according to rule 2.
OTighten both the screws 2.

Adjustment
13
Fig. 13 - 08
13.04.08 Hook-to-needle clearance, needle bar rise, needle height and needle guard
(The setting of the left hook is omitted with the PFAFF 1255)
Rule
When the needle rise is positioned 2.0 mm after b.d.c. of the needle bar with version C
and with stitch length regulation "3":
1. the hook point should be at the needle midpoint and have a clearance of 0.05 to
0.1 mm to the needle.
2. The upper edge of the needle eye should be 0.8 to 1.0 mm under the tip of the hook.
3. The needle guard 8 should lightly touch the needle.
OSet the stitch length to "3".
OLoosen the screws 1, 2 and 3.
OLoosen the screws 4 on the front and back.
OAdjust the posts 5 according to rule 1.
OTighten the screws 1 and 4.
OMove the needle bar to b.d.c. and slide the feeler gauge corresponding to the version
with its cutout tightly under the lower needle bar bearing. Move the screw clamp so that
it touches the feeler gauge and tighten it.
ORemove the feeler gauge and turn the handwheel in the direction of rotation until the
screw clamp rests on the needle bar bearing.
OSet the hook point on the middle of the needle and take care that the needle is not
squeezed by the needle guard 8.
OTighten the screws 2, ensuring that the bevel gear 6 is not too tight, but that there is not
too much play on the hook.
OAdjust the retaining collar 7 up against the bevel gear 6 and tighten the screws 3.
OAdjust the needle height according to rule 2.
OAlign the needle guard 8 according to rule 3.
With the PFAFF 1296 it is important to readjust the position of the connect-
ing rod to the thread trimmer after changing the needle gauge (see chapter
13.05.10 Connecting rod) .
0.8 - 1 mm
0.05 - 0.1 mm
8
11
1
1
23
3
2
6
7
7
6
4
5

Adjustment
14
13.04.09 Top feed lift
Rule
The presser foot 1 and the top feed foot 2 should each lift 7.0 mm off the needle plate
when turning the handwheel at the maximum top feed lift position and when the stitch
length is set to "0".
OSet the maximum top feed lift and set the stitch length to "0".
OFit the presser foot 1.
OTurn the handwheel in the direction of rotation until the top feed foot 2 has reached its
highest point.
OTurn the crank 3 (screws 4)according to the rule.
OCarry out a check according to the rule.
Fig. 13 - 09
7 mm
7 mm
3
4
1
2

Adjustment
15
13.04.10 Top feed stroke movement
Rule
The presser foot 6 and the needle point should reach the needle plate at the same time
at maximum top feed lift if the presser foot 1 rests on the needle plate.
OLoosen the screw 1.
OSlide the lever 2 in its slotted lever until you feel it reach the upper stop (maximum top
feed lift); tighten the screw 1.
OLower the presser foot 3 onto the needle plate.
OLoosen the screws 4 until the eccentric 5 is difficult to turn.
OTurn the eccentric 5 according to the rule.
OTighten the screws 4.
OCarry out a check according to the rule
Fig. 13 - 10
12
3
4
6
5

Adjustment
16
13.04.11 Bobbin case opener
Rule
The needle thread should not become jammed between the bobbin case opener 1 and
the bobbin case base 3 or between the retaining lug 4 and the retaining dog of the needle
plate (see arrow)
Fig. 13 -11
OUnscrew the post cover plates 2 (from the back with the left post).
OLoosen the screws 5 until the bobbin case opener 1 is difficult to turn.
OThread the machine and insert the testing material.
OFit the sewing foot.
OTurn the bobbin case opener 1 (screw 5)according to the rule.
OLoad the bobbin case opener 1 from above in this position, slide the clamp collar 6
upwards up to the stop and tighten the screw 5.
2
5
6
3
1
4

Adjustment
17
13.04.12 Safety clutch
The safety clutch 4 is set ex works. If the thread jams, the safety clutch 4 dis-
engages to avoid damage to the hooks. The process to engage the clutch is de-
scribed below.
ORemove the thread jam.
OPress the catch 1 and turn the handwheel until the pawl 2 engages in the groove 3.
Fig. 13 - 12
4
4
1
2
3

Adjustment
18
13.04.13 Needle thread tension release
Rule
When the presser foot is raised, both tension discs should be at least 0.5 mm apart.
ORaise the presser foot with the hand lever.
OAlign the pressure plate 1 behind the tension mounting plate 2 according to the rule.
The release pin 3 must not be loaded with effective tension.
Fig. 13 -13
The clearance of 0.5 mm is the minimum size and may be over 1 mm with
thick types of yarn.
2
1
3
0.5 mm

Adjustment
19
Fig. 13 - 14
2
134
13.04.14 Thread check spring (with the PFAFF 1295 and PFAFF 1296 without thread trimmer -900/56)
OAdjust the stop 1 (screw 2)according to the rule.
OTurn the screw 3 (screw 4)to set the spring tension
The length of the thread check spring deflection may deviate slightly upwards
or downwards for reasons relating to the sewing technology.
Rule
The movement of the thread check spring 5 should be finished when the needle point
punctures the material (spring deflection = approx. 7 mm).
5
7 mm

Adjustment
20
Fig. 13 - 15
2
1
3
13.04.15 Thread check spring (with the PFAFF 1296 with thread trimmer -900/56)
OTurn the screw 2 (screw 3)to set the spring tension of the thread check spring 1.
OTurn the support 4 (screw 5)according to the rule.
OTurn the screw 7 (screw 8)to set the spring tension of the thread check spring 6.
OTurn the support 9 (screw 10)according to the rule
The length of the thread check spring deflection may deviate slightly upwards
or downwards for reasons relating to the sewing technology.
Rule
The movement of the thread check springs 1 and 6 should be finished when the needle
points puncture the material (spring deflection = approx. 7 mm).
7 mm
6
49
7
5
810