Pfaff POWERLINE 3741 User manual

296-12-19 008/002
Betriebsanleitung engl. 11.09
DOKU-SEAM-SYSTEM
3741
3745

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

SET-UP INSTRUCTIONS
INSTRUCTION MANUAL
SAFETY
ADJUSTMENT MANUAL
CALIBRATION INSTRUCTIONS
SHORT INSTRUCTIONS FORTHE INPUT
SOFTWARE
PARTS LIST

Sicherheit 01

PFAFF Industriesysteme und Maschinen AG, 67661 Kaiserslautern
Declaration of acknowledgement
of the documentation for the PFAFF-DOKU-SEAM-SYSTEM
Customer:................................................................................................................................................
Address:...................................................................................................................................................
Machine: PFAFF 3741 ................................... Serial-Nr.: ................................................................
Machine: PFAFF 3745.................................. Serial-Nr.: ................................................................
PC-software: ................................................. Control software:.....................................................
Each person working on the PFAFF-DOKU-SEAM-SYSTEM must be familiar with and understand the
contents of these technical documents. The operating and qualified personnel must be appropriately
authorised to handle the machine, i.e. qualified and instructed. The operator promises to train his per-
sonnel accordingly.
We hereby confirm that we have read and understood the documentation for the PFAFF-DOKU-SEAM-
SYSTEM, and that in addition to the advice in the documentation, we will also follow the local safety and
accident prevention regulations.
Place:...................................................................................... Date:................................................
Operator:...................................................................................................................................................

1
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.

2
Safety
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.
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.

3
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 explai-●
ned in the regulations EN 50110.
replace the protective coverings and close the electrical control box afer all repairs or●
maintenance work!

4
Safety
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 finger guard 1!
Danger of injury by up and down movement of needle!
Do not run the machine without take-up lever guard 2!
Danger of injury by moving take-up lever!
Do not run the machine without belt guards 3and 4!
Danger of injury by rotating v-belt!
Do not operate the machine without tilt lock 5!
Danger of crushing between sewing head and table!
Do not operate the machine without support 6! Danger due to top-heavy
sewing head! Machine can tip over backwards when tilted!
Fig. 1 - 01
2
1
3
4
6
5

Aufstell-Anl. 02

Betriebs-Anl. 03

This instruction manual applies to
machines from software version 1.2 and
serial number 2 763 625 onwards
Betriebsanleitung engl. 11.09
INSTRUCTION MANUAL
3741
3745

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
1Proper use............................................................................................................................. 5
2Specifications .......................................................................................................................6
3Disposal of Machine ............................................................................................................ 7
4Transportation, packing and storage.................................................................................. 8
4.01 Transportation to customer‘s premises ................................................................................. 8
4.02 Transportation inside the customer‘s premises..................................................................... 8
4.03 Disposal of packing materials ................................................................................................ 8
4.04 Storage .................................................................................................................................. 8
5Explanation of symbols....................................................................................................... 9
6Controls .............................................................................................................................. 10
6.01 On/off switch....................................................................................................................... 10
6.02 Power bar ............................................................................................................................ 10
6.03 Sewing lamp switch ............................................................................................................ 11
6.04 Pedal .................................................................................................................................... 11
6.05 Keyboard on machine head.................................................................................................. 12
6.06 Knee switch (optional).......................................................................................................... 14
6.07 Presser foot fixing key ......................................................................................................... 14
6.08 Bobbin thread supply monitor ............................................................................................. 15
6.09 Adjustment of the stand height (optional) ........................................................................... 15
6.10 Touch-screen monitor .......................................................................................................... 16
6.11 Label-printer......................................................................................................................... 16
6.12 Hand-held scanner ............................................................................................................... 17
6.13 PC ........................................................................................................................................ 17
7Setting up ........................................................................................................................... 18
7.01 Log-in ................................................................................................................................... 18
7.02 Language selection.............................................................................................................. 18
7.03 Inserting the needle ............................................................................................................ 19
7.04 Winding the bobbin thread, regulating the winder tension (PFAFF 3741+ 3745 PLUS) ....... 20
7.05 Winding the bobbin thread, regulating the winder tension (PFAFF 3745 PREMIUM).......... 21

Index
Contents ..................................................................................Page
7.06 Bobbin-changing/threading, and regulating the bobbin thread tension................................ 22
7.07 Threading the needle thread (PFAFF 3741 PLUS + 3745 PLUS) ............................................23
7.08 Threading the needle thread (PFAFF 3745 PREMIUM) ..........................................................24
8Sewing ................................................................................................................................ 25
8.01 Calling up / carry out the sewing operation ......................................................................... 25
8.02 Regulating the needle thread tension (PFAFF 3741 + 3745 PLUS)........................................ 26
8.03 Regulating the needle thread tension (PFAFF 3745 PREMIUM) ........................................... 28
8.04 Description of the functions ................................................................................................ 30
8.05 Concluding the sewing operation ........................................................................................ 32
9Care and maintenance....................................................................................................... 33
9.01 Servicing and maintenance intervals ................................................................................... 33
9.02 Cleaning the machine .......................................................................................................... 33
9.03 Lubricating ........................................................................................................................... 34
9.04 Checking/regulating the air pressure ................................................................................... 35
9.05 Emptying/cleaning the water bowl of the air filter/regulator................................................ 35
10 Wearing parts ..................................................................................................................... 36