Pfaff Industrial POWERLINE 2231 Guide

This Adjustment Manual is valid for machines
from the following serial numbers onwards:
# 2 765 806
296-12-19 151/002
Justieranleitung engl. 11.10
ADJUSTMENT MANUAL
2231

The reprinting, copying or translation of PFAFF Service 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

Index
Contents ................................................................................ Page
1Adjustment ........................................................................................................................... 4
1.01 Notes on adjustment ............................................................................................................. 4
1.02 Tools, gauges and other accessories for adjusting ............................................................... 4
1.03 Abbreviations ......................................................................................................................... 4
1.04 Explanation of the symbols.................................................................................................... 4
1.05 Adjusting the basic machine .................................................................................................. 5
1.05.01 Basic position of the balance wheel (adjustment aid)............................................................ 5
1.05.02 Balance weight ...................................................................................................................... 6
1.05.03 Zero position of the bottom and needle feed ........................................................................ 7
1.05.04 Feed dog motion of bottom feed dog and needle feed ......................................................... 8
1.05.05 Feeding motion of the bottom feed dog ................................................................................ 9
1.05.06 Height of the bottom feed dog ............................................................................................ 10
1.05.07 Feeding stroke difference .................................................................................................... 11
1.05.08 Preliminary adjustment of the needle height....................................................................... 12
1.05.09 Needle rise, hook clearance and needle height ................................................................... 13
1.05.10 Bobbin winder...................................................................................................................... 14
1.05.11 Thread check spring and thread regulator............................................................................ 15
1.05.12 Sewing foot pressure........................................................................................................... 16
1.05.13 Lubrication ........................................................................................................................... 17
1.05.14 Limiting the stitch length ..................................................................................................... 18
1.05.15 Basic position of the machine drive (only on machines with PicoDrive) .............................. 19
1.06 Adjusting the thread trimmer -900/91.................................................................................. 20
1.06.01 Basic position of the thread trimmer ................................................................................... 20
1.06.02 Control cam to roller lever clearance (resting position)........................................................ 21
1.06.03 Adjusting the control cam.................................................................................................... 22
1.06.04 Knife pressure...................................................................................................................... 23
1.06.05 Manual cutting test .............................................................................................................. 24
2Circuit diagrams................................................................................................................. 25
2.01 Block diagram PFAFF 2231 PLUS with control pack P45 PD-L ............................................ 25
2.02 Circuit diagrams ................................................................................................................... 26

4
Adjustment
1 Adjustment
Please observe all notes from Chapter 1Safety 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 instruc-
tion manual!
If not otherwise stated, the machine must be disconnected from the electrical
power supply. Danger of injury due to unintentional starting of the machine!
1.01 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 adjust-
ments, 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.
1.02 Tools, gauges and other accessories for adjusting
●Screwdrivers with blade width from 2to 10 mm
●Spanners (wrenches) with jaw width from 7to 14 mm
●1set Allen keys from 1.5to 6mm
●1feed dog adjustment gauge, Part No. 61-111 689-04
●Metal rule (part No. 08-880 218-00)
●Sewing thread and test materials
1.03 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
1.04 Explanation of the symbols
In this adjustment manual, symbols emphasize operations to be carried out or important in-
formation. The symbols used have the following meaning:
Note, information
Service, repair, adjustment, maintenance
(work to be carried out by qualified staff only)

5
Adjustment
Fig. 1 - 01
1
2
2
1.05 Adjusting the basic machine
1.05.01 Basic position of the balance wheel (adjustment aid)
Requirement
When the needle bar is positioned at t.d.c., the marking "0" on the scale should be level
with the top edge of the belt guard (see arrow).
Adjust the scale dial 1(four screws 2) in accordance with the requirement.

6
Adjustment
Fig. 1 - 02
12
1
2
1.05.02 Balance weight
Requirement
When the needle bar is positioned at b.d.c. (balance wheel position 180°) the largest ec-
centricity of the balance weight 1should be at the top.
●Adjust balance weight 1(screw 2) in accordance with the requirement.

7
Adjustment
Fig. 1 - 03
13
2
1.05.03 Zero position of the bottom and needle feed
Requirement
When the stitch length is set at "0", the bottom feed dogs and the needle bar should not
make any feeding motion when the balance wheel is turned.
●Remove spring 1.
●Adjust crank 2(screw 3) in accordance with the requirement.
●Replace the spring 1.

8
Adjustment
Fig. 1 - 04
1.05.04 Feed dog motion of bottom feed dog and needle feed
Requirement
Bottom transporters, as well as the needle bar should not move, when stitch
platen 3is activated with handwheel at 190° or higher.
●Adjust eccentric 1(screws 2) in accordance with the requirement. Make sure that the
cut-out (see arrow) is visible.
1
2
3

9
Adjustment
Fig. 1 - 05
1.05.05 Feeding motion of the bottom feed dog
Requirement
When the balance wheel is positioned at 180°, the feed dog should be at t.d.c.
●Adjust eccentric 1(screws 2) in accordance with the requirement.
1
2

10
Adjustment
Fig. 1 - 06
1.05.06 Height of the bottom feed dog
Requirement
1. When the needle bar is positioned at b.d.c. (balance wheel position 180°), the bottom
feed dog should be positioned 0.5mm horizontally above the top edge of the needle
plate, when crank 6is in the centre of the slot.
2. The bottom feed dog should be positioned in the centre of the needle plate slot.
12
4
3
5
0,5 mm
127-091
7
6
●Turn lifting crank 1(screws 2) in accordance with requirement 1.
●Adjust eccentric sleeve 3and feed bar 5(screws 4) in accordance with requirement 2
The height of the bottom feed dog can be increased or reduced by moving
crank 6(nut 7) up or down.

11
Adjustment
Fig. 1 - 07
+
-
12
1.05.07 Feeding stroke difference
Requirement
With the maximum stitch length set, when the balance wheel is turned the feeding stro-
kes of the needle and the bottom feed dog should be the same.
●With connecting rod 1(nut 2) increase ("+") or reduce (-) the needle feed stroke in
accordance with the requirement.

12
Adjustment
Fig. 1 - 08
1
2
22 mm
1.05.08 Preliminary adjustment of the needle height
Requirement
When the needle bar is positioned at t.d.c. (balance wheel position 0°), the clearance
between the needle point and the needle plate should be 22 mm.
●Without turning it, re-position needle bar 1(screw 2) in accordance with the
requirement.

13
Adjustment
1.05.09 Needle rise, hook clearance and needle height
Requirement
For stitch length setting "4.5" and needle bar position 2.0mm to u.T. ( = handwheel positi-
on 202°):
1. The hook point 5should be positioned at needle centre with a needle cut clearance
of 0.05 – 0.1mm.
2. The top of the needle eye should be positioned 0.8mm below hook point 5.
Fig. 1 - 09
1
2
3
2
5
0,05 - 0,10 mm
4
0,8 mm
5
●Set stitch length "4.5" and bring the balance wheel into the needle rise position.
●Adjust hook 1(screws 2) in accordance with requirement 1.
●Bring oil distributor ring 3(screw 4) into contact with hook 1.
●Without turning it, re-position the needle bar in accordance with the requirement 2.

14
Adjustment
Fig. 1 - 10
2
1
3
1.05.10 Bobbin winder
Requirement
1. When the bobbin winder is engaged, the winding spindle must be driven reliably.
When it is disengaged, friction wheel 3should not be touching drive wheel 1.
2. When it is switched off, the bobbin winder must click securely into its end position
(knife raised).
●Adjust drive wheel 1(screw 2) in accordance with the requirement.

15
Adjustment
Fig. 1 - 11
2
4
5
6
3
7 mm
1
1.05.11 Thread check spring and thread regulator
Requirement
1. The movement of thread regulator 3must be completed when the needle point enters
the material.
2. When the thread loop is at its largest while being passed around the hook, the check
thread spring 3should rise slightly from the rest 1.
●Position rest 1(screw 2) in accordance with requirement 1.
●Turn sleeve 4(screw 2) to adjust the tension of thread check spring 3.
●Position thread regulator 5(screw 6) in accordance with requirement 2.
For technical reasons it may be necessary to deviate from the indicated spring
stroke or spring tension.
Move thread regulator 5(screw 6) towards ("+") (= more thread) or ("-") (= less
thread).

16
Adjustment
Fig. 1 - 12
1
1.05.12 Sewing foot pressure
Requirement
The material should be fed properly even at maximum speed and with the smallest stroke.
●Turn adjustment wheel 1in accordance with the requirement.

17
Adjustment
Fig. 1 - 13
12
1.05.13 Lubrication
Requirement
After a running time of 10 seconds a thin film of oil should be visible on paper strip 1
when this is held over the hook.
●Check that the machine is filled with oil and that the oil lines are free of air.
●Run the machine for 2– 3 min.
Do not put your hands into the needle area when the machine is running!
Danger of injury from moving parts!
●With the machine running, hold paper strip 1against the hook and check the require-
ment.
●If necessary, regulate amount of oil with screw 2.

18
Adjustment
●Set the desired max. stitch length at control button 1
(on model BN and CN = 6.0mm).
●Remove adjustment knob 1(screws 2) and scale dial 3.
●Remove adjustment unit 4(screws 5).
●Bring lineal 6(screw 7) to the unit using stitch adjuster 4(see arrow).
●Replace adjustment unit 4, scale dial 3and adjustment knob 1.
Fig. 1 - 14
1
2
3
5
4
6
7
When exchanging the parts kit with stitch lengths differing from the as-deliv-
ered state of the machine, limit the max. stitch length using stitch adjuster 4.
1.05.14 Limiting the stitch length

19
Adjustment
1.05.15 Basic position of the machine drive (only on machines with PicoDrive)
●Switch on the machine.
●When the machine is commissioned, "Pulley" appears on the display.
●Call up the parameter input by pressing the scroll key.
●Press the TE key to switch the function keys to input function (LED in the TE key is
illuminated).
●Press the corresponding +/- keys to select parameter "798" and select the service level
C, see chapter Selecting the User Level in the separate instruction manual for the control
panel.
●Select parameter "800" by pressing the corresponding +/- keys.
●Check whether the value is set at "1" (balance wheel turns towards operator) and alter if
necessary.
●Press the scroll key until "Pulley" appears on the display.
●If the pedal is operated, the control unit carries out a teach-in operation.
●The machine runs at low speed until the teach-in operation is completed.
●This operation cannot be interrupted.
●After the teach-in operation, the "Pulley" disappears from the screen - display returns to
standard.
●Select parameter "700" by pressing the +/- keys.
●Sew one stitch by operating the pedal.
●Turn the balance wheel in the direction of rotation until the needle point, descending
from above, is flush with the top edge of the needle plate.
●Conclude the adjustment of the sewing motor by pressing the scroll key.

20
Adjustment
Fig. 1 - 15
1 mm
3
1
2
4
5
2
6
7
1.06 Adjusting the thread trimmer -900/91
1.06.01 Basic position of the thread trimmer
Requirement
1. When the thread trimmer is in its resting position (cylinder extended), the point of
thread catcher 6should be flush with the cutting edge of knife 7(see arrow).
2. The roller lever 3should have a clearance of 1mm to the connecting piece.
●Adjust thread trimmer 1(screws 2) in accordance with requirement 1.
●Adjust roller lever 3(only screw 4) in accordance with requirement 2.