Pfaff 1243 Guide

1243
1244
296-12-19 313/002
adjustment Manual engl. 07.15
This adjustment manual applies to machines
from the serial number 7262 020 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 .................................................................................................................. 6
13.04.02 Feed dog height..................................................................................................................... 7
13.04.03 Needle position to needle hole .............................................................................................. 8
13.04.04 Needle height (pre-calibrating) ............................................................................................... 9
13.04.05 Feeding motion.................................................................................................................... 10
13.04.06 Feed lifting motion............................................................................................................... 11
13.04.07 Home position of roller presser drive .................................................................................. 12
13.04.08 Synchronisation of roller presser and feed dog ................................................................... 13
13.04.09 Release of roller presser when reverse sewing .......................................................................14
13.04.10 Hook-to-needle clearance, needle bar rise, needle height and needle guard .......................... 15
13.04.11 Bobbin lifter. ........................................................................................................................ 16
13.04.12 Safety clutch ........................................................................................................................ 17
13.04.13 Clearance between roller presser and needle plate ............................................................ 18
13.04.14 Roller presser pressure........................................................................................................ 19
13.04.15 Needle thread tension release............................................................................................. 20
13.04.16 Thread check spring (with the PFAFF 1243 and PFAFF 1244 without thread trimmer -900/56) . 21
13.04.17 Thread check spring (with the PFAFF 1244 with thread trimmer -900/56) ............................... 22
13.04.18 Bobbin winder...................................................................................................................... 23
13.05 Adjusting thread trimmer -900/56 .................................................................................... 24
13.05.01 Control cam ( pre-calibrating ) .............................................................................................. 24
13.05.02 Tripping lever ....................................................................................................................... 25

Table of Contents
Contents ..................................................................................Page
13.05.03 Pawl ..................................................................................................................................... 26
13.05.04 Engaging solenoid................................................................................................................ 27
13.05.05 Release cam ........................................................................................................................ 28
13.05.06 Engaging lever ..................................................................................................................... 29
13.05.07 Connecting rod .................................................................................................................... 30
13.05.08 Control cam (pre-calibrating) ................................................................................................ 31
13.05.09 Catch.................................................................................................................................... 32
13.05.10 Connecting rod ( only with the PFAFF 1244) ....................................................................... 33
13.05.11 Thread catcher height ...............................................................................................................34
13.05.12 Knife ..................................................................................................................................... 35
13.05.13 Thread catcher reverse position .......................................................................................... 36
13.05.14 Bobbin thread clamp spring ................................................................................................. 37
13.05.15 Tension release lever........................................................................................................... 38
13.06 Adjusting lifting lever with subclass -911/97........................................................................ 39
13.07 Adjusting lifting lever without subclass -911/97................................................................... 40
13.08 Parameter settings ............................................................................................................. 41
13.09 Internet update of control P40 CD ...................................................................................... 41
14 Circuit Diagrams .......................................................................................................... 42

Adjustment
5
13 Adjustment
The illustrations in this chapter show the PFAFF 1244 two-needle sewing
machine.
Various settings must be carried out only on one side with the PFAFF 1243
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
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. 61-111 600-02)
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
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
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 15 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 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 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