Pfaff POWERLINE 2571 ME PLUS User manual

This instruction manual applies to machines
from software version 0389/001 and serial
number 2 766 760 onwards
296-12-19 128/002
Betriebsanleitung engl. 02.11
INSTRUCTION MANUAL
2571 ME PLUS
2574 ME PLUS
2591
ME PLUS

This Instruction Manual is valid for all models and subclasses listed in the
chapter "Specifications".
The adjustment manual for the machines can be downloaded free of
charge from the internet address
www.pfaff-industrial.com/pfaff/de/service/downloads
As an alternative to the internet download the adjustment manual can also be
ordered in book form under part no. 2296-12-19 129/002.
The reprinting, copying or translation of PFAFF Instruction 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
1Safety .................................................................................................................................... 5
1.01 Directives .............................................................................................................................. 5
1.02 General notes on safety......................................................................................................... 5
1.03 Safety symbols ...................................................................................................................... 6
1.04 Important points for the user................................................................................................. 6
1.05 Operating and specialist personnel........................................................................................ 7
1.05.01 Operating personnel .............................................................................................................. 7
1.05.02 Specialist personnel............................................................................................................... 7
1.06 Danger warnings.................................................................................................................... 8
2Proper use............................................................................................................................. 9
3Specifications ..................................................................................................................... 10
3.01 PFAFF 2571 ME, 2574 ME, 2591 ME .................................................................................. 10
3.02 Machine equipment and options ......................................................................................... 11
4Disposal of Machine .......................................................................................................... 12
5Transportation, packing and storage................................................................................ 13
5.01 Transportation to customer‘s premises ............................................................................... 13
5.02 Transportation inside the customer‘s premises................................................................... 13
5.03 Disposal of packing materials ..............................................................................................13
5.04 Storage ................................................................................................................................ 13
6Explanation of symbols..................................................................................................... 14
7Controls .............................................................................................................................. 15
7.01 On/off switch / Sewing lamp switch (option) ...................................................................... 15
7.02 Pedal .................................................................................................................................... 15
7.03 Keyboard on machine head.................................................................................................. 16
7.04 Swivel out the roller-presser ................................................................................................ 17
7.05 Knee lever ............................................................................................................................ 17
7.06 Switchable needle thread tension........................................................................................ 18
7.07 Edge trimmer -725/04 for 2571 ME..................................................................................... 19
7.08 Edge trimmer -725/04 for 2591 ME..................................................................................... 20
7.09 Control panel........................................................................................................................ 21
7.09.01 Selection keys...................................................................................................................... 21
7.09.02 Function keys ....................................................................................................................... 22
8Preparation ........................................................................................................................ 24
8.01 Inserting the needle ............................................................................................................ 24
8.02 Winding the bobbin thread, regulating the winder tension.................................................. 25
8.03 Removing/Inserting the bobbin case ................................................................................... 26
8.04 Threading the bobbin case/Adjusting the bobbin thread tension......................................... 26

Index
Contents ..................................................................................Page
8.05 Threading the needle thread and regulating its tension on model 2571 and 2591 ME .......27
8.06 Threading the needle thread and regulating its tension on model 2574 ME ........................28
8.07 Setting the stitch length ............................................................................................................29
8.08 Switching the sewing functions on / off............................................................................... 29
8.09 Entering start and end backtack stitches ..................................................................................30
8.10 Enter / change template code.............................................................................................. 31
8.11 Bobbin thread control........................................................................................................... 33
9Sewing ................................................................................................................................ 35
9.01 Manual sewing..................................................................................................................... 35
9.01.01 Turning sewing functions on/off........................................................................................... 36
9.01.02 Changing number of backtack stitches ................................................................................ 36
9.01.03 Selecting parameter entry ................................................................................................... 37
9.01.04 Selecting the maximum speed ............................................................................................ 37
9.02 Programmed Sewing ........................................................................................................... 38
9.03 Error Messages.................................................................................................................... 39
10 Input .................................................................................................................................... 40
10.01 Programming sewing........................................................................................................... 40
10.02 List of parameters for control P320 / P321.......................................................................... 43
10.03 Error Messages and Description.......................................................................................... 48
10.04 Motor Errors......................................................................................................................... 49
11 Care and maintenance....................................................................................................... 50
11.01 Servicing and maintenance intervals ................................................................................... 50
11.02 Cleaning the machine .......................................................................................................... 50
11.03 Oiling the hook..................................................................................................................... 51
11.04 Monitoring the oil level for clamp and head pieces.............................................................. 51
11.05 Lubricating the bevel gears.................................................................................................. 52
11.06 Cleaning the blower air filter ................................................................................................ 52
12 Wearing parts ..................................................................................................................... 53

5
Safety
1 Safety
1.01 Directives
This machine is constructed in accordance with the European regulations contained in the
conformity and manufacturer’s declarations.
In addition to this Instruction Manual, also observe all generally accepted, statutory and
other regulations and legal requirements and all valid environmental protection regulations!
The regionally valid regulations of the social insurance society for occupational accidents or
other supervisory organizations are to be strictly adhered to!
1.02 General notes on safety
●This machine may only be operated by adequately trained operators and only after having
completely read and understood the Instruction Manual!
●All Notes on Safety and Instruction Manuals of the motor manufacturer are to be read be-
fore operating the machine!
●The danger and safety instructions on the machine itself are to be followed!
●This machine may only be used for the purpose for which it is intended and may not be
operated without its safety devices. All safety regulations relevant to its operation are to
be adhered to.
●When exchanging sewing tools (e.g. needle, roller presser, needle plate and bobbin),
when threading the machine, when leaving the machine unattended and during mainte-
nance work, the machine is to be separated from the power supply by switching off the
On/Off switch or by removing the plug from the mains!
●Everyday maintenance work is only to be carried out by appropriately trained personnel!
●Repairs and special maintenance work may only be carried out by qualified service staff
or appropriately trained personnel!
●Work on electrical equipment may only be carried out by appropriately trained personnel!
●Work is not permitted on parts and equipment which are connected to the power supply!
The only exceptions to this rule are found in the regulations EN 50110.
●Modifications and alterations to the machine may only be carried out under observance
of all the relevant safety regulations!
●Only spare parts which have been approved by us are to be used for repairs! We express-
ly point out that any replacement parts or accessories which are not supplied by us have
not been tested and approved by us. The installation and/or use of any such products can
lead to negative changes in the structural characteristics of the machine. We are not liable
for any damage which may be caused by non-original parts.

6
Safety
I
1.04 Important points for the user
●This Instruction Manual is an integral part of the machine and must be available to the
operating personnel at all times.
●The Instruction Manual must be read before operating the machine for the first time.
●The operating and specialist personnel is to be instructed as to the safety equipment of
the machine and regarding safe work methods.
●It is the duty of the user to only operate the machine in perfect running order.
●It is the obligation of the user to ensure that none of the safety mechanisms are removed
or deactivated.
●It is the obligation of the user to ensure that only authorized persons operate and work
on the machine.
Further information can be obtained from your PFAFF agent.
1.03 Safety symbols
Danger!
Points to be observed.
Danger of injury for operating and specialist personnel!
Caution
Do not operate without finger guard and safety devices.
Before threading, changing bobbin and needle, cleaning
etc. switch off main switch.

7
Safety
1.05 Operating and specialist personnel
1.05.01 Operating personnel
Operating personnel are persons responsible for the equipping, operating and cleaning of
the machine as well as for taking care of problems arising in the sewing area.
The operating personnel is required to observe the following points and must:
●always observe the Notes on Safety in the Instruction Manual!
●never use any working methods which could adversely affect the safety of the machine!
●not wear loose-fitting clothing or jewelery such as chains or rings!
●also ensure that only authorized persons have access to the potentially dangerous area
around the machine!
●always immediately report to the person responsible any changes in the machine which
may limit its safety!
1.05.02 Specialist personnel
Specialist personnel are persons with a specialist education in the fields of electrics, electro-
nics and mechanics. They are responsible for the lubrication, maintenance, repair and adjust-
ment of the machine.
The specialist personnel is obliged to observe the following points and must:
●always observe the Notes on Safety in the Instruction Manual!
●switch off the On/Off switch before carrying out adjustments or repairs, and ensure that
it cannot be switched on again unintentionally!
●wait until the luminous diode on the control box is no longer blinking or on before begin-
ning adjustment or repair work.
●never work on parts which are still connected to the power supply! Exceptions are ex-
plained in the regulations EN 50110.
●replace the protective coverings and close the electrical control box afer all repairs or
maintenance work!

8
Safety
Fig. 1 - 01
1.06 Danger warnings
A working area of 1mmust be kept free both in front of and behind the machi-
ne, so that easy access is possible at all times.
Never put your hands or fingers in the sewing area during sewing!
Danger of injury by the needle!
While setting or adjusting the machine do not leave any objects on the table nor
in the needle plate area! Objects may be trapped or flung out of the machine!
Do not run the machine without take-up lever guard 1!
Danger of injury by moving take-up lever!
Do not operate machine without cover 2and belt guard 3!
Risk of injury from moving parts!
Do not operate the machine without tilt lock 4!
Danger of crushing between sewing head and table!
Do not operate the machine without support 5! Danger due to top-heavy
sewing head! Machine can tip over backwards when tilted!
1
2
5
3
4

9
Proper use
2 Proper use
The PFAFF 2571 ME and PFAFF 2591ME are high-speed, single-needle postbed sewing
machines with a forwards and reverse feeding feed wheel and roller presser and needle
feed.
PFAFF 2571 ME Post to the left of the needle.
PFAFF 2591 ME Post to the right of the needle.
The PFAFF 2574 ME is a high-speed, two-needle postbed sewing machines with a forwards
and reverse feeding feed wheel and roller presser.
The machines are used for sewing lockstitch seams in the leather and upholstery industries.
Any and all uses of this machine which have not been approved of by the
manufacturer are considered to be inappropriate! The manufacturer cannot be
held liable for any damage caused by the inappropriate use of the machine!
The appropriate use of the machine includes the observance of all operational,
adjustment, maintenance and repair measures required by the manufacturer!

Specifications
10
3 Specifications *
3.01 PFAFF 2571 ME, 2574 ME, 2591 ME
Stitch type:..........................................................................................................301 (lockstitch)
Needle system:
2571, 2591........................................................................................................................... 134
2574 .............................................................................................................................. 134 - 35
Model:............................................................................................................................. A, B, C
Needle thickness in 1/100 mm:
Model A: ................................................................................................................................ 70
Model B: ............................................................................................................................. 100
Model C: ............................................................................................................................. 130
Stitch length max.: .........................................................................................................5,0 mm
Thread thickness max. ( Synthetiks ):
Model A: .......................................................................................................................... 60/3▲
Model B: .......................................................................................................................... 40/3▲
Model C: .......................................................................................................................... 15/3▲
Clearance under roller presser:.........................................................................................7 mm
Clearance width: ...........................................................................................................345 mm
Clearance height: ..........................................................................................................290 mm
Post height:...................................................................................................................180 mm
Max. speed:
PFAFF 2571, 2591 Ausführung A + B .....................................................................3500 spm X
PFAFF 2574 Ausführung A + B............................................................................... 2600 spm X
PFAFF 2574, 2591 Ausführung C ............................................................................2000 spm X
Cutting depth (for –725/..): ....................................................................................0.8 – 2.5 mm
Cutting speed (for –725/..):................................................................................. 2800 cuts/min.
Noise data:
Emission level at workplace at appropriate speed
(Noise measurement in accordance with DIN 45 635-48-A-1, ISO 11204, ISO 3744, ISO 4871)
model A + B at a speed of 2800 spm.:............................................................ LpA = 80 dB(A) ■
model C at a speed of 1600 spm.:................................................................... LpA = 74 dB(A) ■
Connection data:
Operating voltage: ................................................................................ 230 V ± 10%, 50/60 Hz
Max. power consumption: ............................................................................................. 1.2 kVA
Fuse protection: ................................................................................................... 1 x 16 A, inert
Leakage current: ....................................................................................................... < 5 mA **
Net weight of sewing head:..................................................................................approx. 87 kg
Gross weight of sewing head: ..............................................................................approx. 97 kg
❋Subject to alteration
❋ ❋ Due to the use of network filters there is a nominal leakage current of <5mA.
XDependent on material, work operation and stitch length
▲or similar strengths of other types of thread
■K
pA = 2,5dB

Specifications
11
3.02 Machine equipment and options
●= Standard, ❍= Option
Vetical hook ●
Thread trimmer (-900/81), < 13 mm thread ends ●
Presser foot lift (-910/..), electromagnetic ●
Knuckle switch manual locking ●
Automatic backtacking (-911/..) ●
Oil level control through inspection glass ●
Roller-presser pressure, manually adjustable ●
DC-motor functionality ●
Control panel - PicoTop ●
Integrated multiple switch on machine head ●
Integrated LED sewing lamp on sewing head, dimmable ●
Bobbin thread winding device ●
Edge trimmer -725/.. (only on the 2571 and 2591)❍

Disposal of Machine
12
4 Disposal of Machine
●Proper disposal of the machine is the responsibility of the customer.
●The materials used for the machine are steel, aluminium, brass and various plastic
materials. The electrical equipment comprises plastic materials and copper.
●The machine is to be disposed of according to the locally valid pollution control regula-ti-
ons; if necessary, a specialist ist to be commissioned.
Care must be taken that parts soiled with lubricants are disposed of separately
according to the locally valid pollution control regulations!

Transportation, packing and storage
13
5 Transportation, packing and storage
5.01 Transportation to customer‘s premises
The machines are delivered completely packed.
5.02 Transportation inside the customer‘s premises
The manufacturer cannot be made liable for transportation inside the customer‘s premises
nor to other operating locations. It must be ensured that the machines are only transported
in an upright position.
5.03 Disposal of packing materials
The packing materials of this machine comprise paper, cardboard and VCE fibre. Proper dis-
posal of the packing material is the responsibility of the customer.
5.04 Storage
If the machine is not in use, it can be stored as it is for a period of up to six months, but It
should be protected against dust and moisture.
If the machine is stored for longer periods, the individual parts, especially the surfaces of
moving parts, must be protected against corrosion, e.g. by a film of oil.

Explanation of symbols
14
6 Explanation of symbols
In this instruction manual, work to be carried out or important information is accentuated by
symbols. These symbols have the following meanings:
Note, information
Cleaning, care
Lubrication
Maintenance, repairs, adjustment, service work
(only to be carried out by technical staff)

15
Controls
Fig. 7 - 02
7 Controls
7.01 On/off switch / Sewing lamp switch (option)
●To switch the control system of the
machine on or off, turn main switch 1.
●Switch the sewing lamp, which is inte-
grated in the machine head, on or off by
operating switch 2.
●Switch 3regulates the brightness of the
sewing lamp.
0 +1
-1 -2
7.02 Pedal
●With the on/off switch on
0= Machine stop
+1= Sew
- 1= Raise roller presser
- 2= Trim thread
Fig. 7 - 01
12
3

16
Controls
Fig. 7 - 03
1234
●The machine as a keyboard with 4keys to activate different functions.
●When the keys 1– 4are operated on the standard version, the functions listed below are
carried out.
Key 1: Reverse sewing or intermediate backtacks during the seam (Standard)
Key 2: Needle position change / Half stitch
In setting 203, this button can be allocated to the following functions:
1= Half stitch, 2= Needle position change, 3= Knee switch
Key 3: Needle position change / Single stitch
In setting 204 this button can be allocated to the following functions:
1= Single stitch, 2= Needle position change, 3= Knee switch
Key 4: EMERGENCY key
Needle rises without thread trimming, thread tension is released, roller presser is
raised and the motor start inhibitor is activated. If the key is operated again, the
motor start inhibitor is deactivated.
7.03 Keyboard on machine head

17
Controls
Fig. 7 - 04
Fig. 7 - 05
7.05 Knee lever
●Operate knee lever 1to raise the roller
presser.
1
7.04 Swivel out the roller-presser
●In the raised position the roller-presser
1can be swivelled out by gently pulling
downwards.
1

18
Controls
Fig. 7 - 06
7.06 Switchable needle thread tension
●The needle thread tension can be increa-
sed by turning lever 1to the right.
1

19
Controls
7.07 Edge trimmer -725/04 for 2571 ME
Keep your hands away from the
moving knife! Danger of injury!
Switch on knife drive:
●Move lever 1backwards. The knife
moves into operating position.
Switch off knife drive:
●Press lever 1. The knife swings back-
wards.
Switch on edge guide:
●Swing edge guide 2into position by
hand and press lever 3. The edge guide 2
moves into its operating position.
Switch off edge guide:
●Raise edge guide 2and let it click into
position. The edge guide 2is out of
operation.
●Raise lever 4. The edge guide swings
backwards.
Changing the knife:
The following work may only be carried out by technical staff or by
persons who have been properly instructed.
●Switch off the machine.
●Loosen screw 5and remove knife 6.
●Insert new knife and slightly tighten screw 5.
●Adjust the knife according to Chaper 1.06.05 Cutting stroke and tighten screw 5.
Fig. 7 - 07
1
6
4
3
5
2

20
Controls
Fig. 7 - 08
7.08 Edge trimmer -725/04 for 2591 ME
Keep your hands away from the moving knife! Danger of injury!
Switch on knife drive:
●Move lever 1backwards. The knife moves into operating position.
Switch off knife drive:
●Press lever 1. The knife swings backwards.
Switch on edge guide:
●Swing edge guide 2into position by hand and press lever 3. The edge guide 2moves
into its operating position.
Switch off edge guide:
●Raise edge guide 2and let it click into position. The edge guide 2is out of operation.
●Raise lever 4. The edge guide swings backwards.
Changing the knife:
The following work may only be carried out by technical staff or by
persons who have been properly instructed.
●Switch off the machine.
●Loosen screw 5and remove knife 6.
●Insert new knife and push it close to needle plate insert 7.
●Slightly tighten screw 5.
●Adjust the knife according to Chaper 1.06.07 Knife position and tighten screw 5.
16
4
3
5
2
7