Pfaff POWERline 2591 ME User manual
This service manual applies to machines
from software version 0389/001 and serial
number 2 766 760 onwards
296-12-19 129/002
Justieranleitung engl. 09.10
SERVICE MANUAL
2591 ME
2591 PREMIUM
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 ........................................................................................................................... 5
1.01 Notes on adjustment ............................................................................................................. 5
1.02 Tools, gauges and other accessories for adjusting ............................................................... 5
1.03 Abbreviations ......................................................................................................................... 5
1.04 Explanation of the symbols.................................................................................................... 5
1.05 Adjusting the basic machine .................................................................................................. 6
1.05.01 Basic position of the balance wheel (adjustment aid)............................................................ 6
1.05.02 Balance weight ...................................................................................................................... 7
1.05.03 Needle position in the direction of sewing ............................................................................ 8
1.05.04 Limiting the needle bar frame.............................................................................................. 10
1.05.05 Preliminary adjustment of the needle height....................................................................... 11
1.05.06 Needle rise, Gripper distance, Needle height and Needle guard......................................... 12
1.05.07 Needle position crosswise to sewing direction ................................................................... 14
1.05.08 Height and stroke of the bobbin case opener...................................................................... 15
1.05.09 Height of the feed wheel ..................................................................................................... 16
1.05.10 Roller-presser ....................................................................................................................... 17
1.05.11 Clearance between roller presser and feed wheel .............................................................. 18
1.05.12 Knee lever ............................................................................................................................ 19
1.05.13 Tension release .................................................................................................................... 20
1.05.14 Thread check spring and thread regulator ............................................................................ 21
1.05.15 Bobbin winder...................................................................................................................... 22
1.05.16 Sewing foot pressure........................................................................................................... 23
1.05.18 Lubrication ........................................................................................................................... 24
1.05.19 Re-engaging the slip-clutch .................................................................................................. 25
1.06 Adjusting the thread trimmer -900/81.................................................................................. 26
1.06.01 Resting position of the roller lever / radial position of the control cam................................ 26
1.06.02 Position of the thread catcher holder ...................................................................................27
1.06.03 Distance between thread catcher and needle plate ............................................................ 28
1.06.04 Position of the thread catcher .............................................................................................. 29
1.06.05 Knife position and knife pressure......................................................................................... 30
1.06.06 Bobbin thread retaining spring............................................................................................. 31
1.06.07 Manual cutting test .............................................................................................................. 32
Index
Contents ................................................................................Page
1.07 List of parameters for control P321 ..................................................................................... 33
1.08 Error Messages and Description.......................................................................................... 38
1.09 Motor Errors......................................................................................................................... 39
1.10 Internet-Update der Maschinen-Software............................................................................ 40
1.10.01 Updating 2591 ME (with null modem cable) ...................................................................... 40
1.10.02 Updating 2591 PREMIUM (with SD card) ........... ............................................................... 41
2 Circuit diagrams................................................................................................................. 43
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
1●set Allen keys from 1.5to 6mm
Setting gauge (Needle position in sewing direction Order No.●61-111 641-48)
Step gauge●
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
Fig. 1 - 01
1
2
2
127-01
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.
Adjustment
7
Fig. 1 - 02
1
2
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.
Adjustment
8
1.05.03 Needle position in the direction of sewing
Requirement
With the stitch length set at "5", in its front and rear point of reversal the needle should be
the same distance from the inside edges of the needle hole.
Turn on machine and set stitch length to "●5".
Turn machine off and on (synchronise needle bar to stitch length).●
Sew a stitch and check the rear position of the needle according to the requirement.●
Press the stitch control key, sew a stitch and check the forward position of the needle ac-●
cording to the requirement and where necessary make the following adjustments.
Turn off machine and loosen screws●1and 2.
Push the adjusting pin's angled part (Order No.●61-111Snnb641-48 through hole 3
into the hole in lever 4.
Fig. 1 - 03
3
4
2
5
=
=
1
Adjustment
9
Move the needle bar frame●5according to the requirement and tighten screw 1.
Check according to the requirement.●
Screws●2remain loosened for the subsequent adjustment.
Adjustment
10
Fig. 1 - 04
1.05.04 Limiting the needle bar frame
Requirement
With the stitch length set at "5", when the needle is in its front and rear point of reversal
screw 3should be the same distance from the inside edge of its hole..
Set stitch length to "●5".
Select parameter●605.
Turn the handwheel in the direction of rotation and check the "requirement".●
If necessary move regulating bow●1(screw 2).
3
2
1
3
=
=
This manual suits for next models
1
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