Pfaff 3371-10 series Guide

Adjustment Manual
3371-10/..
296-12-18 634/002
Justieranleitung engl. 05.07
This Adjustment manual applies to machines from
software version 0300/015 and serial number 60 801 005
onwards.

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 Industrie Maschinen AG
Postfach 3020
D-67653 Kaiserslautern
Königstr. 154
D-67655 Kaiserslautern

Contents
Contents .................................................................................Chapter – Page
15 Adjustment ......................................................................................................................... 1
15.01 Notes on adjustment............................................................................................................ 1
15.02 Tools, gauges and other accessories ................................................................................... 1
15.03 Abbreviations ....................................................................................................................... 1
15.04 Explanation of the symbols .................................................................................................. 1
15.05 Basic position of the machine .............................................................................................. 2
15.06 Button clamp zero point .......................................................................................................3
15.07 Aligning the feeder ............................................................................................................... 5
15.08 Aligning the button clamp .................................................................................................... 7
15.09 Hook driver........................................................................................................................... 8
15.10 Needle height ....................................................................................................................... 9
15.11 Hook-to-needle clearance ................................................................................................... 10
15.12 Needle rise and needle guard ............................................................................................. 11
15.13 Aligning the hook race cover .............................................................................................. 12
15.14 Button clamp height ...........................................................................................................13
15.15 Button clamp pressure ....................................................................................................... 14
15.16 Position of the thread wiper ............................................................................................... 15
15.17 Position of the control cam ................................................................................................ 16
15.18 Position of the control roller ............................................................................................... 17
15.19 Position of the drive shaft of the thread trimmer ............................................................... 18
15.20 Aligning the stop plate .......................................................................................................19
15.21 Adjusting the trimmer solenoid .......................................................................................... 20
15.22 Adjusting the engaging lever .............................................................................................. 21
15.23 Position of the thread catcher and knife ............................................................................. 22
15.24 Position of the release trip ................................................................................................. 23
15.25 Position of the release catch .............................................................................................. 24
15.26 Needle thread tension release ........................................................................................... 25
15.27 Thread check spring and thread regulator .......................................................................... 26
15.28 Bobbin winder drive wheel ................................................................................................. 27
15.29 Button clamp initiator ......................................................................................................... 28
15.30 Changing the feeder and the jaws of the button clamp ..................................................... 29
15.31 Cold start ........................................................................................................................... 30
15.32 Internet update of the machine software ........................................................................... 31
15.33 List of parameters .............................................................................................................. 32
15.34 Error messages on the display ........................................................................................... 40
15.35 Sewing motor errors .......................................................................................................... 41
15.36 OTE-errors ......................................................................................................................... 41
16 Circuit diagrams ............................................................................................................... 42

Adjustment
1
15 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.
15.01 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.
15.02 Tools, gauges and other accessories
●1 set of screwdrivers with blade widths from 2 to 10 mm
●1 set of spanners with jaw widths from 7 to 14 mm
●1 set of Allen keys from 1.5 to 6 mm
●1 metal ruler, part no. 08-880 218-00
●1 machine zero point gauge, part number 61-111 637-08
●1 gauge button, part number 61-111 635-6
15.03 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
15.04 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
2
15.05 Basic position of the machine
Requirement
After being switched on the machine should position approx. 3 – 4 mm before t.d.c. take-
up lever.
●Switch on the machine.
●Press the TE key.
●Select parameter 605 with the corresponding +/- key.
●Press pedal forwards once briefly (machine positions in t.d.c. needle).
●Hold clutch 1(screws 2) and bring the needle bar into the appropriate position by turning
the balance wheel.
●Press pedal forwards again to re-check the position set.
●Conclude the adjustment by operating the TE key.
The distance from the clutch 1to the motor plate should be 3.5 mm.
In the direction of rotation the second screw of the clutch section 3should be
on the surface of the motor shaft.
The clutch section 1should be touching the 0-ring of the axial bearing.
2
1
3,5 mm
2
3
Fig. 15 - 01

Adjustment
3
15.06 Button clamp zero point
Requirement
After the machine ahs been switched on and parameter "608" selected,
1. the needle should be centred to the hole in the adjustment gauge,
2. the switch lugs 2and 4should be centred to the respective initiator.
●Remove the button clamp holder and the lower feed plate .
●Screw adjustment gauge 1(part no. 61-111 637-08) to the button clamp drive unit.
Preliminary adjustment
●Move the button clamp drive unit by hand in accordance with requirement 1.
●Adjust switch lug 2(screw 3) and switch lug 4(screw 5) in accordance with requirement 2.
Fine adjustment
●Switch on the machine.
●In the input mode, select parameter "608", see Chapter 11.03 Parameter input in the
instruction manual.
4
5
2
3
1
Fig. 15 - 02

Adjustment
4
●If necessary, enter the access code, see Chapter 11.05.01 Entering the access code in
the instruction manual.
●With the corresponding +/- key move the button clamp drive unit in accordance with
requirement 1, also see Chapter 11.03 Parameter input.
●Switch off the machine.
●Remove adjustment gauge 1.
●Fit the lower feed plate and button clamp holder.
If, during the fine adjustment, the setting is ± 5 increments above or below the
value in X- and Y-direction, the setting should be checked again in accordance
with requirement 2.

Adjustment
5
15.07 Aligning the feeder
Regel
The feeder should be aligned in the "X and Y direction” in such a way that the feeder cut-
out does not touch the raised needle hole 3 during sewing.
●Switch on the machine.
●Set the sewing area size (see Chapter 9.07 Adjusting the size of sewing area in the
instruction manual)
●In the input mode, select parameter "610", see Chapter 11.03 Parameter input in the
instruction manual
●If necessary, enter the access code, see Chapter 11.04.01 Entering the access code in
the instruction manual.
●Align feeder 1(screw 2) so that the raised needle hole 3is positioned in the centre of the
feeder cutout.
Checking the "Y-direction"
●To check this adjustment, move along the maximum set sewing area size in "Y-
direction" by pressing the corresponding +/- keys (readjust if necessary).
X
Y
1
Fig. 15 - 03
2
3

Adjustment
6
●Call up parameter "609".
Checking the "X-direction"
●Move along the maximum set sewing area size in "X-direction" by pressing the
corresponding +/- keys.
●If necessary adjust the position of feeder 1by entering a correction value "X" with the
corresponding +/- keys in "X-direction" in accordance with the requirement.
●Conclude the input.

Adjustment
7
15.08 Aligning the button clamp
Requirement
The button clamp should be aligned in "X" and "Y" direction, so that the needle penetrates
the centre of the gauge button.
●Insert gauge button 1(part number 61-111 635-66) and switch on the machine.
●In the input mode select parameter "609", see Chapter 11.03 Parameter input of the
instruction manual (machine moves to "0-position").
●If necessary, enter the access code, see Chapter 11.05.01 Entering the access code in
the instruction manual.
●Adjust button clamp 2(screws 3) in "X and Y direction" in accordance with the
requirement.
●Conclude the input, remove the gauge button and switch off the machine.
Fig. 15 - 03_a
3
2
1

Adjustment
8
15.09 Hook driver
Requirement
1. When the balance wheel is turned, the machine should not bind.
2. The play of catch 7should be less than 0.1 mm.
●Remove the hook.
●Loosen screws 1, 2 and 3(remove motor 4).
●Move the eccentric shaft 5in accordance with requirement 1 and twist it in accordance
with requirement 2.
●Tighten screws 1and 3.
●Move adjustment ring 6against the metal edge and tighten screw 2.
●Insert the hook.
If catch 7has too much play, the running noise of the machine increases. Too
little play may cause the machine to jam.
Fig. 15 - 04
7
361
2
5 4

Adjustment
9
Fig. 15 - 05
1
2
15.10 Needle height
Requirement
With the needle bar in b.d.c., the upper marking on the needle bar 1should be flush with
the lower edge of the needle bar bush.
●Adjust needle bar 1(screw 2) in accordance with the requirement.

Adjustment
10
Fig. 15 - 06
0,05 - 0,10 mm 23
1
4
7,5 mm
0,05 - 0,10 mm
15.11 Hook-to-needle clearance
Requirement
When the bottom marking of the ascending needle bar is level with the lower edge of the
needle bar bush
1. the hook point 5should be at a distance of 0.05 – 0,1 mm from the needle groove.
2. the distance between the needle and the tip of the hook race should be 7.5 mm.
●Loosen screws 1, 2and 3.
●Turn the eccentric pin 4in accordance with the requirements.
●Tighten screws 2and 3.
Screw 1remains loosened for further adjustments.

Adjustment
11
Fig. 15 - 07
2
1
15.12 Needle rise and needle guard
Requirement
When the bottom marking of the ascending needle bar is level with the lower edge of the
needle bar bush
1. the hook point should be centred to the needle and
2. the needle guard (see arrow) should slightly touch the needle.
●Turn catch 1(screw 2) in accordance with requirement 1, or move it in accordance with
requirement 2.

Adjustment
12
Fig. 15 - 08
2
1
2
1
A
B
15.13 Aligning the hook race cover
Requirement
The needle should be centred to cutout Band the rear side of the needle flush to the
imaginary line A.
●Move the hook race cover 1(screws 2) in accordance with the requirement.

Adjustment
13
15.14 Button clamp height
Requirement
The button clamp should be 13 mm above the upper edge of the needle plate.
●Turn lever 1(nut 2and screw 3) in accordance with requirement .
After aligning the button clamp, it is imperative to check the position of the
thread wiper, see Chapter 15.16 Position of the thread wiper! Danger of
needle breakage!
Fig. 15 - 09
1
2
13 mm

Adjustment
14
15.15 Button clamp pressure
Requirement
The pressure of the button clamp should be set so that the workpiece can be held reliably
without pressure marks.
●Adjust milled screw 1in accordance with the requirement.
Fig. 15 - 10
1

Adjustment
15
15.16 Position of the thread wiper
Requirement
When the thread wiper is centred to the needle, its lower edge should be 14 – 15 mm
above the upper edge of the needle plate.
●Bring thread wiper 1into the appropriate position
●Move thread wiper 1(screw 2) in accordance with the requirement.
Fig. 15 - 11
15 - 15 mm
2
1

Adjustment
16
Fig. 15 - 12
3
1
2
32,5 mm
15.17 Position of the control cam
Requirement
1. The markings on control cam 1and arm shaft 3should correspond with each other.
2. The outer edge of control cam 1should be at a distance of 32.5 mm from the metal
surface of the case.
●Turn control cam 1(screw 2) in accordance with requirement 1, or move it in accordance
with requirement 2.

Adjustment
17
15.18 Position of the control roller
Requirement
When the needle bar is at its b.d.c., the control roller should be centred to the running path
of control cam 2.
Fig. 15 - 13
2
1
43
●Turn screw 3(nut 4) in accordance with the requirement.
●For checking purposes, operate lever 1by hand to let the control roller fall into the running
path of control cam 2.