Pfaff 3371-1 series User manual

Instruction Manual
3371-1/..
296-12-18 618/002
Betriebsanleitung engl. 06.05
This instruction manual applies to machines from software
version 0335/009 and serial number 6 001 000 onwards

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 Industrie Maschinen AG
Postfach 3020
D-67653 Kaiserslautern
Königstr. 154
D-67655 Kaiserslautern
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/de/service/download/index.php3.
As an alternative to the internet download the adjustment manual can also be
ordered in book form under part no. 296-12-18 619/002.

Contents
Contents ................................................................................. Chapter - Page
1Safety ........................................................................................................................... 1 - 1
1.01 Directives ...................................................................................................................... 1 - 1
1.02 General notes on safety ................................................................................................ 1 - 1
1.03 Safety symbols ............................................................................................................. 1 -2
1.04 Important points for the user ........................................................................................ 1 - 2
1.05 Operating and specialist personnel ............................................................................... 1 - 3
1.05.01 Operating personnel ...................................................................................................... 1- 3
1.05.02 Specialist personnel ......................................................................................................1- 3
1.06 Danger .......................................................................................................................... 1 - 4
2Proper use.................................................................................................................... 2 -1
3Specifications .............................................................................................................. 3 - 1
4Disposal of machine ................................................................................................... 4 - 1
5Transport, packaging and storage ............................................................................. 5 - 1
5.01 Transport to the customer ............................................................................................ 5 - 1
5.02 Transport within the customer’s premises ................................................................... 5 - 1
5.03 Disposal of the packaging ............................................................................................. 5 - 1
5.04 Storage ......................................................................................................................... 5 - 1
6Explanation of the symbols ........................................................................................ 6 - 1
7Control elements ......................................................................................................... 7 - 1
7.01 Main switch ..................................................................................................................7- 1
7.02 Pedal ............................................................................................................................. 7 - 1
7.03 Balance wheel ............................................................................................................... 7- 2
7.04 Control panel ................................................................................................................. 7 - 3
7.04.01 Screen displays ............................................................................................................. 7 - 3
7.04.02 Display symbols ............................................................................................................ 7 - 3
7.04.03 Function keys ................................................................................................................ 7 - 4
8Installation and commissioning ................................................................................. 8 - 1
8.01 Installation ..................................................................................................................... 8 - 1
8.01.01 Adjusting the table height ............................................................................................. 8 - 1
8.01.02 Removing the transit support ........................................................................................ 8 - 2
8.01.03 Fitting the reel stand ..................................................................................................... 8 - 2
8.01.04 Mounting the table top (for deliveries without stand) .................................................... 8 - 3
8.01.05 Table top drill hole plans ................................................................................................8- 4
8.01.06 Connecting the plug-in connections and earth cable ..................................................... 8 - 6
8.02 Commissioning the machine ......................................................................................... 8 - 6
8.03 Switching the machine on/off ....................................................................................... 8 - 6

Contents
Contents ................................................................................. Chapter - Page
9Setting up .................................................................................................................... 9 -1
9.01 Inserting the needle ...................................................................................................... 9 - 1
9.02 Threading the needle thread / adjusting the needle thread tension ............................... 9 - 2
9.03 Winding the bobbin thread ............................................................................................ 9 - 3
9.04 Removing / replacing the bobbin case ........................................................................... 9 - 4
9.05 Threading the bobbin thread / adjusting the bobbin thread tension ............................... 9 - 4
9.06 Selecting a seam program ............................................................................................ 9 - 5
9.06.01 Selecting and changing the seam pattern. .................................................................... 9 - 5
9.06.02 Selecting a program station. ......................................................................................... 9 - 6
9.06.03 Selecting a sequence .................................................................................................... 9 -6
9.07 Adjusting the size of the sewing area ........................................................................... 9 - 7
9.08 Setting up the bobbin thread counter ............................................................................ 9 - 8
9.09 Resetting the piece counter .......................................................................................... 9 - 8
9.10 Shifting the seam pattern .............................................................................................. 9 - 9
10 Sewing ....................................................................................................................... 10 -1
10.01 Operating cycle ........................................................................................................... 10 -1
10.02 Error messages ........................................................................................................... 10 - 1
11 Input ...........................................................................................................................11- 1
11.01 Reserving program stations ........................................................................................ 11 - 1
11.02 Entering sequences .................................................................................................... 11 - 2
11.03 Parameter input .......................................................................................................... 11 - 3
11.04 Access codes .............................................................................................................. 11 - 4
11.04.01 Entering the access code ............................................................................................ 11 - 4
11.04.02 Changing the access code .......................................................................................... 11 - 4
11.04.03 Granting access rights ................................................................................................ 11 - 5
11.05 Summary of the seam patterns .................................................................................. 11 - 6
11.06 List of parameters ....................................................................................................... 11 - 9
11.07 Error messages on the display .................................................................................... 11 - 16
11.08 Sewing motor errors ................................................................................................... 11 - 17
11.09 OTE-errors .................................................................................................................. 11-17
12 Care and maintenance .............................................................................................. 12 - 1
12.01 Maintenance intervals ................................................................................................. 12 - 1
12.02 Cleaning the machine .................................................................................................. 12 - 1
12.03 Cleaning the hook compartment ................................................................................. 12 - 2
12.04 Oiling the needle head parts ....................................................................................... 12 - 2
12.05 Oiling the hook ............................................................................................................ 12- 3
12.06 Oiling the bearing points in the arm ............................................................................ 12 - 4
12.07 Oil disposal .................................................................................................................. 12 - 4
13 Wearing parts ............................................................................................................ 13 - 1

1 - 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
before 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
maintenance 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
expressly 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.

1 - 2
Safety
1.03 Safety symbols
Danger!
Points to be observed.
Danger of injury for operating and specialist personnel!
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.
I
Caution
Do not operate without finger deflector and safety
devices.
Before threading, changing bobbin and needle, cleaning
etc. switch off main switch.

1 - 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,
electronics and mechanics. They are responsible for the lubrication, maintenance, repair and
adjustment 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
beginning adjustment or repair work.
●never work on parts which are still connected to the power supply! Exceptions are
explained in the regulations EN 50110.
●replace the protective coverings and close the electrical control box afer all repairs or
maintenance work!

1 - 4
Safety
Do not operate the machine without its take-up-lever guard 1!
Danger of injury due to the motion of the take-up lever!
Do not operate the macine without finger deflector 2!
Danger of injury by the needle!
Do not operate the machine without eye shield 3!
Danger of injury from flying needle fragments!
Only operate the machine with cover 4closed!
Danger of injury from rotating hook!
Do not operate the machine without cover 5!
Danger of injury from moving parts!
1.06 Danger
A working area of 1 meter is to be kept free both in front of and behind the
machine while it is in operation so that it is always easily accessible.
Never reach into the sewing area while sewing! Danger of injury by the needle!
Never leave objects on the table while adjusting the machine settings!
Objects can become trapped or be slung away! Danger of injury!
Fig. 1 - 01
1
2
3
4
5

Proper use
2 - 1
2 Proper use
The Pfaff 3371-1/.. is an automatic sewing machine for sewing lockstitch bartacks and short
seams in the sewing industry.
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
3 - 1
3 Specifications ▲
Max. sewing speed: ............................................................................................. 2700 spm
Feed type: ......................................................................................................... intermittent
Stitch length: ................................................................................................ 0.1 – 10.0 mm
Stitch type: .................................................................................................. 301 (lockstitch)
Needle size in 1/100 mm:
for fine materials: ....................................................................................................70 - 100
for medium-weight materials: .............................................................................. 100 - 120
for medium-heavy materials: ................................................................................ 120 - 140
Needle system
Subclass -1/01, -1/21, -1/31 ......................................................................................... DPx5
Subclass -1/11 ........................................................................................................... DPx17
Needle bar stroke: ................................................................................................... 41 mm
Fabric clearance: ............................................................................................. max. 17 mm
Max. size of sewing area: ................................................................................ 40 x 20 mm
Power supply: ........................................................... 220 V ± 10%, 50/60 Hz, single phase
Power consumption: ............................................................................................. 0.55 kVA
Electrical power rating: ........................................................................................... 1,2 kVA
Fuse protection: ............................................................................................. 1x 16 A, inert
Noise data:
Noise emission level at workplace
with a sewing cycle of 4 sec. on and 2 sec. off: ........................................ Lpa = 74 dB(A) ■
(Noise measurement in accordance with DIN 45 635-48-B-1, ISO 11204, ISO 3744, ISO 4871)
Sewing head dimensions:
Length: ...................................................................................................... approx. 770 mm
Width: ....................................................................................................... approx. 220 mm
Height: ...................................................................................................... approx. 380 mm
Dimensions of standard base:
Length: .................................................................................................... approx. 1060 mm
Width: ....................................................................................................... approx. 600 mm
Height: ...................................................................................................... approx. 820 mm
Weights
Sewing head: .............................................................................................. approx. 42 kilos
Base incl. control box: ................................................................................. approx. 45 kilos
▲Subject to alterations
■KpA = 2,5 dB