Pfaff Powerline 2545 Guida
This Adjustment Manual is valid for machines
from the following serial numbers onwards:
# 2 798 767
296-12-19 220/002
Justieranleitung engl. 06.13
ADJUSTMENT MANUAL
2545
2546
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 unison feed ........................................................................................... 7
1.05.04 Feeding motion of the unison feed ....................................................................................... 8
1.05.05 Lifting motion of the bottom feed dog ...................................................................................9
1.05.06 Height of the bottom feed dog ............................................................................................ 11
1.05.07 Feeding stroke difference .................................................................................................... 12
1.05.08 Preliminary adjustment of the needle height....................................................................... 13
1.05.09 Needle rise, hook clearance, needle height and needle guard ............................................ 14
1.05.10 Top feed stroke .................................................................................................................... 16
1.05.11 Top-feed lifting motion ......................................................................................................... 17
1.05.12 Adjusting the potentiometer for speed reduction................................................................ 18
1.05.12.01 On machines with drive P74 ED-L........................................................................................ 19
1.05.12.02 On machines with drive PF 321........................................................................................... 19
1.05.13 Bobbin case opener stroke ................................................................................................. 19
1.05.14 Adjusting the shortened trim stitch......................................................................................20
1.05.15 Bobbin winder...................................................................................................................... 21
1.05.16 Thread check spring and thread regulator............................................................................ 22
1.05.17 Sewing foot pressure........................................................................................................... 23
1.05.18 Lubrication ........................................................................................................................... 24
1.05.19 Limiting the stitch length ..................................................................................................... 25
1.05.20 Speed reduction................................................................................................................... 26
1.05.21 Re-engaging the slip-clutch.................................................................................................. 27
1.06 Adjusting the thread trimmer -900/81.................................................................................. 28
1.06.01 Resting position of roller lever/radial position of control cam .............................................. 28
1.06.02 Position and height of the thread catcher ............................................................................ 29
1.06.03 Knife pressure...................................................................................................................... 30
1.06.04 Bobbin thread clamp spring ................................................................................................. 31
1.06.05 Manual cutting test .............................................................................................................. 32
Index
Contents ................................................................................Page
1.07 Adjusting the thread trimmer device -900/82.................................................................. 35
1.07.01 Preliminary testing ............................................................................................................... 35
1.07.02 Assrémbly of the thread clamp carrier and thread catcher .................................................. 35
1.07.03 Check settings according to the following chapter: ............................................................ 35
1.07.04 Needle position in sewing direction.....................................................................................36
1.07.05 Bottom transporter in sewing direction ............................................................................... 37
1.07.06 Blade position ...................................................................................................................... 38
1.07.07 Thread catcher height .......................................................................................................... 39
1.07.08 Thread catcher position in sewing direction......................................................................... 40
1.07.09 Thread catcher position crossways to sewing direction ...................................................... 41
1.07.10 Position of the control curve ................................................................................................ 42
1.07.11 Thread clamp ....................................................................................................................... 43
1.07.12 Parameter values ................................................................................................................. 44
2Circuit diagrams................................................................................................................. 45
Adjustment
5
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
●1gauge for the top feed stroke 5.0mm (Part No. 61-111 633-60)
●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)
Adjustment
6
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).
Fig. 1 - 01
1
2
2
127-01
●Adjust the scale dial 1( depending on model screws 2or 3) in accordance with the re-
quirement.
3
3
Adjustment
7
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.
1
2
1
2
Fig. 1 - 02
Adjustment
8
1.05.03 Zero position of the unison feed
Requirement
When the stitch length is set at "0", the top and 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.
Fig. 1 - 03
13
2
Adjustment
9
1.05.04 Feeding motion of the unison feed
Requirement
When the needle bar is positioned at b.d.c. (balance wheel position 180°), and the ma-
ximum stitch length is set, the top and bottom feed dogs and the needle bar should not
make any feeding motion when the reverse-feed lever is pressed.
●Adjust eccentric 1(screws 2) in accordance with the requirement. Make sure that the
cut-out (see arrow) is visible.
Fig. 1 - 04
1
2
Adjustment
10
1.05.05 Lifting 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.
Use the kit with the Order No. 91-501 399-90 to deactivate the transporter lif-
ting movement.
●Install assembly and adjust
●Remove collar 3(screws 4) and crank 5(screw 6, nut 7).
●Mount the preassembled parts of the kit as shown in figures 1 - 05a.
●Adjust bottom transporter height and stroke movement where required.
Fig. 1 - 05
1
2
3
4
6
5
7
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