Pfaff hobby 1122 Guide

ADJUSTMENT MANUAL
296-12-18 582/002
Justieranleitung engl. 06.09
This Adjustment Manual is valid for machines
from the following serial numbers onwards:
# 6 001 000
Industrial
®
11 2 2
11 2 2 -G
11 2 2 -720/02
11 2 2 -G-720/02

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. 12 - IG Nord
D-67661 Kaiserslautern

Contents
Contents ................................................................................. Chapter - Page
12 Adjustment ................................................................................................................ 12 - 2
12.01 Notes on adjustment................................................................................................... 12 - 2
12.02 Tools, gauges and other accessories .......................................................................... 12 - 2
12.03 Abbreviations .............................................................................................................. 12 -2
12.04 Explanation of the symbols ......................................................................................... 12 - 2
12.05 Adjusting the basic machine ....................................................................................... 12 - 3
12.05.01 Basic position of the hook drive unit ........................................................................... 12 - 3
12.05.02 Positioning the feed dog ............................................................................................. 12 - 4
12.05.03 Height of the feed dog ................................................................................................ 12 - 5
12.05.04 Adjusting the stitch length .......................................................................................... 12 - 6
12.05.05 Preliminary adjustment of the needle height............................................................... 12 - 7
12.05.06 Positioning the needle in centre of the needle hole .................................................... 12 - 8
12.05.07 Hook-to-needle clearance, needle rise, needle height and needle guard..................... 12 - 9
12.05.08 Hook to needle plate clearance ................................................................................... 12 -11
12.05.09 Bobbin case opener .................................................................................................... 12 -12
12.05.10 Hook lubrication .......................................................................................................... 12 -13
12.05.11 Presser foot to needle place clearance / presser foot pressure .................................. 12 -14
12.05.12 Thread check spring .................................................................................................... 12 -15
12.05.13 Needle thread tension release .................................................................................... 12 -16
12.05.14 Bobbin winder drive wheel and bobbin winder............................................................ 12 -17
12.05.15 Limiting the knee lever stroke..................................................................................... 12 -18
12.06 Adjusting the thread trimmer -900/93 ......................................................................... 12 -19
12.06.01 Basic position of the thread trimmer........................................................................... 12 -19
12.06.02 Thread catcher to hook clearance ............................................................................... 12 -20
12.06.03 Thread catcher position............................................................................................... 12 -21
12.06.04 Manual cutting test ..................................................................................................... 12 -22
12.06.05 Needle thread tension release .................................................................................... 12 -23
12.07 Adjusting the thread wiper -909/93 ............................................................................. 12 -24
12.08 Parameter settings (only on machines with Quick-motor)........................................... 12 -25
12.08.01 Selecting the user level............................................................................................... 12 -25
12.08.02 Example of a parameter input ..................................................................................... 12 -26
12.08.03 List of parameters....................................................................................................... 12-27
12.09 Internet update of the machine software.................................................................... 12 -28
12.10 Reset / Cold start ........................................................................................................ 12 -29
13 Circuit diagrams ........................................................................................................ 13 - 1

Adjustment
12 - 1
12 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 1.06 Danger warnings of the
instruction manual!
If not otherwise stated, the machine must be disconnected from the electrical
power supply.
12.01 Notes on adjustment
All following adjustments are based on a fully assembled machine and may only be carried
out by expert 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 which have to be completely adjusted. If only specific individual work steps are
carried out, both the preceding and following chapters must be observed.
Screws, nuts indicated in brackets ( ) are fastenings for machine parts, which must be
loosened before adjustment and tightened again afterwards.
12.02 Tools, gauges and other accessories
●1 set of screwdrivers with blade widths from 2 to 10 mm
●1 set of wrenches with jaw widths from 7 to 13 mm
●1 set of Allen keys from 1.5 to 6 mm
●1 metal ruler, part no. 08-880 218-00
●Threads and test material
12.03 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
12.04 Explanation of the symbols
In this adjustment manual, symbols emphasize operations to be carried out or important
information. The symbols used have the following meaning:
Note, information
Service, repair, adjustment, maintenance
(work to be carried out by qualified staff only)

Adjustment
12 - 2
109-031
12.05 Adjusting the basic machine
12.05.01 Basic position of the hook drive unit
Requirement
When the marking "A"on the balance wheel is level with marking 5, marking 3should be
level with marking 4.
●Remove toothed belt 1.
●Adjust belt wheel 2in accordance with the requirement and fit toothed belt 1.
Fig. 12 - 01
1
4
2
3
109-074
5

Adjustment
12 - 3
109-039
12.05.02 Positioning the feed dog
Requirement
1. The feed dog must be the same distance Xfrom the right and left side of the needle
plate cutout.
2. With the longest stitch set, in its front and rear point of reversal the feed dog should be
the same distance Yfrom the needle plate cutout.
●Adjust holder 1(screws 2) in accordance with the requirements.
X
X
12 2
109-040 109-042
Y
Y
Fig. 12 - 02

Adjustment
12 - 4
12.05.03 Height of the feed dog
Requirement
With the stitch length set at "0", at t.d.c. the feed dog should protrude ca. 1 mm over the
needle plate.
●Adjust holder 1(screw 2) in accordance with the requirement.
Fig. 12 - 03
1 mm
1
2

Adjustment
12 - 5
109-037
12.05.04 Adjusting the stitch length
Requirement
The stitch length should be the same when sewing forwards or in reverse.
●Adjust eccentric 1(screw 2) in accordance with the requirement.
Fig. 12 - 04
1
2

Adjustment
12 - 6
109-038
12.05.05 Preliminary adjustment of the needle height
Requirement
With the stitch length set at "0", when the needle bar is at its b.d.c., marking 3should be
flush with the lower edge of bushing 4.
●Adjust needle bar 1(screw 2) in accordance with the requirement.
Fig. 12 - 05
3
1
2
4

Adjustment
12 - 7
109-044
3
4
12.05.06 Positioning the needle in centre of the needle hole
Requirement
With the stitch length set at "0", the needles should enter the needle holes exactly in the
centre.
●Adjust needle bar frame 1(screw 2) in accordance with the requirement.
●Turn needle bar 3(screw 4) in accordance with the requirement.
Fig. 12 - 06
1
109-048
2

Adjustment
12 - 8
12.05.07 Hook-to-needle clearance, needle rise, needle height and needle guard
Requirement
In needle rise position (see table) and with the stitch length set at x
1. the hook point should be centred to the needle and have a side clearance to the needle
of 0.05 – 0.10 mm.
2. the upper edge of the needle eye should be 1.0 – 1.5 mm below the hook point and
3. needle guard 11 should slightly touch the needle.
●Loosen screws 1, 2, 3 and 4.
Fig. 12 - 07
1.0 - 1.5 mm
11
2
244
33
Machine type 1122 1122 1122 1122-G 1122-G
1122-720 1122-720 1122-720 1122-G-720 1122-G-720
Version A B C B C
Stitch length "x" [mm] 2.0 2.0 3.0 3.0 3.0
Needle rise [mm] 1.8 2.0 2.4 2.0 2.4

Adjustment
12 - 9
109-086 109-085
109-060
12
11
10
●Move hook bearings 5and 6outwards until on each side there is a distance of 1-3 mm
between hook point and needle.
●Tighten screws 4.
●Adjust knurled screws 7in accordance with requirement 1 and tighten screws 1and 2.
●Push the toothed wheels lightly against plate 8and tighten screws 3.
●Adjust hook (screws 9) in accordance with requirement 1.
PFAFF 1122 and 1122-G
●Adjust the needle height in accordance with requirement 2, also see Chapter 12.05.05
Preliminary adjustment of the needle height.
PFAFF 1122-720/02 and 1122-G-720/02
●Loosen screw 10 and remove needle holder 11.
●Adjust the needle height (screw 12) in accordance with requirement 2.
●Insert the needle holder 11 and tighten screw 10.
●Align needle guard 13 in accordance with requirement 3.
Fig. 12 - 08
9
9
13
1
1
22 44
33
7
56
8

Adjustment
12 - 10
109-087
12.05.08 Hook to needle plate clearance
Requirement
There should be a clearance of 0.6 – 0.9 mm between the top edge of the bobbin position
stop and the bottom edge of the needle plate cutout.
●Adjust hook 1(screws 2) in accordance with the requirement.
Do not twist hook 1, or the adjustment from Chapter 12.05.07 Hook-to-needle
clearance, needle rise, needle height and needle guard will have to be
repeated.
Fig. 12 - 09
109-085
2
2
0.6 - 0.9 mm
1

Adjustment
12 - 11
109-088
12.05.09 Bobbin case opener
Requirement
The needle thread must not be clamped between the bobbin case opener 1and the bobbin
case 3, nor between bobbin case position finger 4and the retaining trip of the needle plate.
●Thread the machine and insert test material.
●Allow the presser foot to rest on the needle plate.
●Sew a few stitches by turning the balance wheel and carry out a check in accordance
with the requirement.
●Adjust bobbin case opener 1(screw 2) in accordance with the requirement.
Fig. 12 - 10
3
1
2
4

Adjustment
12 - 12
12.05.10 Hook lubrication
Requirement
1. There should be distance of 23.5 – 24.5 mm between the adjustment screw 1and
hook bearing 2.
2. After a running time of 10 seconds a thin oil film should be visible on a strip of paper
held next to the hook.
●Pre-adjust screws 1in accordance with requirement 1.
●Check the adjustment in accordance with requirement 2 and correct it if necessary.
Fig. 12 - 11
1
23.5 - 24.5 mm

Adjustment
12 - 13
12.05.11 Presser foot to needle place clearance / presser foot pressure
Requirement
1. With the presser foot raised there should be a clearance of 7 mm to the needle plate.
2. The material should be fed without difficultly, even at top speed.
●Raise the presser foot with the hand lever.
●Reduce the speed on the presser foot using screw 1(nut 2).
●Without twisting it, adjust presser rod 3(screw 4) in accordance with requirement 1.
●Turn screw 1(nut 2) in accordance with requirement 2.
Fig. 12 - 12
1
2
4
3
109-046
7 mm

Adjustment
12 - 14
3
2
4
6
7
8
910
1
7 mm
12.05.12 Thread check spring
Requirement
1. The movement of thread check springs 3and 6must be finished when the needle point
enters the material ( spring stroke approx. 7 mm).
2. When the thread loop is at its largest while being passed around the sewing hook, the
thread check springs 3and 6must rise slightly from rests 1and 9.
●Adjust rest 1(screw 2) in accordance with requirement 1.
●To adjust the spring tension of thread check spring 3, turn screw 4(screw 5).
●To adjust the spring tension of thread check spring 6, turn bush 7(screw 8).
●Adjust rest 9(screw 10) in accordance with requirement 1. (If the adjustment range is
too small, rest 9can be screwed into another opening.)
●Adjust thread regulator 11 (screws 12) in accordance with requirement 2.
Fig. 12 - 13
12
11
+-
109-089
5

Adjustment
12 - 15
109-090
12.05.13 Needle thread tension release
Requirement
1. When the hand lever is raised, there should be a distance of at least 0.5 mm between
the tension discs 4.
2. When the presser foot is touching the needle plate, the tension must be fully effective.
●Unscrew tension carrier plate 1and align the pressure plate 2in accordance with the
requirement.
The clearance of 0.5 mm is a minimum value and can increase to more than
1 mm when thick threads are being used.
If the tension is correct, release pin 3should not be under pressure.
Fig. 12 - 14
1
4
2
3
0.5 mm

Adjustment
12 - 16
109-049
109-049
12.05.14 Bobbin winder drive wheel and bobbin winder
Requirement
1. With the bobbin winder switched on, the bobbin winder spindle must engage reliably.
With the bobbin winder switched off, friction wheel 5must not touch drive wheel 1.
2. The bobbin winder must switch off automatically when the thread level is
approximately 1 mm from the edge of the bobbin.
●Adjust drive wheel 1(screws 2) in accordance with requirement 1.
●Turn lever 3(screw 4) in accordance with requirement 2.
Fig. 12 - 15
2
1
1 mm
43
5

Adjustment
12 - 17
109-09
3
12.05.15 Limiting the knee lever stroke
Requirement
When the knee lever 3is pushed fully, the presser foot should rise approximately 8 mm
from the needle plate.
●Adjust screw 1(nut 2) in accordance with the requirement.
Fig. 12 - 16
76-033
1
2
3
109-046
8 mm