Pfaff 1293 Guide

1293
1294
296-12-19 297/002
adjustment Manual engl. 07.15
This adjustment manual applies to machines
from the serial number 7262 545 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
Notes on 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 .................................................................................................................. 6
13.04.03 Needle position to needle hole .............................................................................................. 8
13.04.04 Needle height (pre-calibrating) ............................................................................................... 9
13.04.10 Hook-to-needle clearance, needle bar rise, needle height and needle guard ...................... 15
13.04.15 Needle thread tension release............................................................................................. 20
13.04.16 Thread check spring (with the PFAFF 1293 and PFAFF 1294
without thread trimmer -900/56).......................................................................................... 21
13.04.17 Thread check spring (with the PFAFF 1294 with thread trimmer -900/56) .......................... 22
13.04.18 Bobbin winder...................................................................................................................... 23

Table of Contents
Contents ..................................................................................Page
13.05 Adjusting thread trimmer -900/56........................................................................................ 24
13.05.01 Control cam (pre-calibrating) ................................................................................................ 24
13.05.02 Tripping lever spring mechanism......................................................................................... 25
13.05.07 Thread catcher height .......................................................................................................... 30
13.05.10 Bobbin thread clamp spring ................................................................................................. 33
13.05.11 Control cam (pre-calibrating) ................................................................................................ 34
13.06 Adjusting lifting lever with subclass -911/97........................................................................ 37
13.07 Adjusting lifting lever without subclass -911/97................................................................... 38
13.08 Parameter settings ............................................................................................................. 39
13.09 Internet update of control P40 CD ...................................................................................... 39
14 Circuit Diagrams 91-191 585-95 ....................................................................................... 40

Adjustment
5
13 Adjustment
The illustrations in this chapter show the PFAFF 1294 two-needle sewing
machine.
Various settings must be carried out only on one side with the PFAFF 1293
single-needle sewing machine, i.e. in the right hook area.
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 car-
ried out by technical staff trained for this purpose. Machine covers, which have to be re-
moved 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 ma-
chines 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 adjust-
ment 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. 61-111 600-02)
OScrew clamp (order no. 61-111 600-35)
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 empha-
sised 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
Rule
1. The feed dog should have the same clearance on the right and left in the needle plate
cutout.
2. The feed dog should have the same clearance in the needle plate cutout in its front
and rear turning point with maximum stitch length regulation.
OLoosen both of the screws 1 and 2.
OAdjust the rock shaft 3 according to rule 1.
OTighten the screws 1.
OSet the maximum stitch length.
OTurn the rock shaft 3 according to rule 2 and tighten the screws 2.
The surfaces of the tacks 4 must face the screws 1 and the rock shaft 3 must
have no backlash nor move sluggishly.
4
3
4
1

Adjustment
7
13.04.02 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 - 02
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.
2
1
Tooth height

Adjustment
8
Fig. 13 - 03
2
1
13.04.03 Needle position to needle hole
Rule
The needle should pierce the middle of the needle hole exactly (with stitch length regulation
"0").
OSet the stitch length to "0" and move the needle bar to t.d.c.
OLoosen the screws 1, 2 and 3.
OMove the needle directly over the needle hole by turning the handwheel.
OMove the needle bar frame 4 according to the rule.
OTighten the screws 1, 2 and 3.
4
3

Adjustment
9
Fig. 13 - 04
13.04.04 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 14 mm.
OAdjust the needle bar 1 (screw 2)without twisting according to the rule.
1
2
15 mm

Adjustment
10
13.04.05 Feeding motion
Rule
The feed dog should not move when the reverse-feed lever is activated with maximum
stitch length regulation and when the needle bar is in a position 3 mm after t.d.c.
Fig. 13 - 05
OSet the maximum stitch length.
OLoosen the screws 1 until the eccentric 2 is difficult to turn on the shaft.
OMove the needle bar to a position 3 mm after t.d.c.
OWhile maintaining this position, initially position the eccentricity of the eccentric 2 to
"down" and then adjust it slightly so that it complies with the rule when the reverse-feed
lever is activated.
OTighten the screws 1.
1
2

Adjustment
11
13.04.06 Feed lifting motion
Rule
1. The bottom transporter should be in its upper turning point when the needle bar is in a
position 3 mm after t.d.c.
2. The tooth tips of the feed dog should be at the same level as the surface of the needle
plate with maximum stitch length regulation when the needle points pierce the middle
of the needle holes.
2
1
Fig. 13 - 06
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
12
13.04.07 Home position of roller presser drive
Rule
1. The clamping surfaces of the lever 1 in the front turning point position should be hori-
zontal with maximum stitch length regulation.
2. The lever 3 should be in the centre of the cutout in the lever 1.
3. The lever 5 should have a clearance of 18 mm (model N) to the side cover at its rear
turning point.
Fig. 13 - 07
OSet the maximum stitch length.
OTurn the lever 1 (screw 2) according to rule 1.
OTurn the lever 3 (screw 4) according to rule 2.
OTurn the lever 5 (screw 6, accessible from the top through the hole in the housing) ac-
cording to rule 3.
1
6
3
4
2
5
8 mm

Adjustment
13
13.04.08 Synchronisation of roller presser and feed dog
Rule
The feed motion of the roller presser and feed dog must be equal.
Fig. 13 - 08
OTurn the lever 1 (screw 2) according to the rule.
2
1

Adjustment
14
13.04.09 Release of roller presser when reverse sewing
Rule
1. The roller presser should be released when sewing in reverse (cylinder 8 activated).
2. When the roller presser and feed dog are lowered, there should be a clearance of 0.5
mm between the c-lock pin 6 and the bearing 7 when the cylinder 8 is not activated.
Fig. 13 - 09
OAdjust the valve 1 (screws 2) so that the valve 1 is switched between the scale setting 0
and 1 when the lever 3 is activated.
OAdjust the coupling part 4 (screws 5) according to rules 1 and 2.
3
4
5
0.5 mm
2
1
7
8
5
6
7

Adjustment
15
Fig. 13 - 10
13.04.10 Hook-to-needle clearance, needle bar rise, needle height and needle guard
Rule
When the needle rise is positioned 1.8 mm after b.d.c. of the needle bar (on model B);
2.0 mm (on model C) and 2.2 - 2.5 mm (on models C/D and D):
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
point.
3. The needle guard 8 should lightly touch the needle.
OLoosen the screws 1, 2 and 3.
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.
OAdjust the hook bearing bracket 4 according to rule 1.
OTighten the screws 1
OSet the hook point on the middle of the needle and take care that the needle is not
squeezed by the needle guard 5.
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 5 according to rule 3.
With the PFAFF 1294 it is important to readjust the position of the connect-
ing rod to the thread trimmer after changing the needle gauge (see chapter
13.05.06 Connecting rod) .
2
6
3
11
1
1
0.8 - 1 mm
0.05 - 0.1 mm
8
2
3
77
6
4
5

Adjustment
16
13.03.11 Bobbin lifter
Rule
The needle thread should not become jammed between the bobbin lifter 2 and the bobbin
case base 4 or between the retaining lug 5 and the retaining dog of the needle plate (see
arrows).
OUnscrew the covers 1 (from the back with the left post).
OAdjust the bobbin lifter 2 (screws 3) according to the rule.
OLoad the bobbin lifter from above in this position, slide the clamp collar 6 upwards up to
the stop and tighten the screw 2.
1
3
6
2
5
Fig. 13 - 11
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 Clearance between roller presser and needle plate
Rule
The clearance from the raised roller presser to the needle plate should be 5 mm in
machines with a roller presser.
Fig. 13 - 13
ORaise the roller presser with the hand lever.
OReduce the pressure on the roller presser (screw 1).
OAdjust the presser rod 2 (screw 3) according to the rule.
OMake the adjustment as explained in chapter 13.04.14 Roller presser pressure.
1
2
3
5 mm

Adjustment
19
13.04.14 Roller presser pressure
Rule
The material should be transported properly even at top sewing speed.
OTurn the screw 1 according to the rule.
The pressure can also be increased with the screw 2 in machine versions with
a D.
Fig. 13 - 14
1
2

Adjustment
20
13.04.15 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 -15
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