Pfaff 3827-4/33 User manual

Instruction manual
3827
296-12-18 593/002
Betriebsanleitung engl. 02.06
This instruction manual applies to machines from the
following serial numbers onwards:
# 2713253
-4/33
-4/34

This Instruction Manual is valid for all models and subclasses listed in the
chapter " Specifications ".
The reprinting, copying or translation of PFAFF Instruction Manuals, whether in whole or in
part, is only permitted with our previous permission and with written reference to the
source.
PFAFF Industrie Maschinen AG
Postfach 3020
D-67653 Kaiserslautern
Königstr. 154
D-67655 Kaiserslautern

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
5Transportation, packing and storage ......................................................................... 5 - 1
5.01 Transportation to customer's premises ........................................................................ 5 - 1
5.02 Transportation inside the customer's premises ............................................................ 5 - 1
5.03 Disposal of packing materials........................................................................................ 5 - 1
5.04 Storage ......................................................................................................................... 5 - 1
6Explanation of symbols .............................................................................................. 6 - 1
7Controls ....................................................................................................................... 7- 1
7.01 On/off switch ................................................................................................................7- 1
7.02 Pedal ............................................................................................................................. 7 - 1
7.03 Knee switch ..................................................................................................................7- 2
7.04 Keys on the machine head ............................................................................................ 7 - 2
7.05 Adjustment lever for stitch length and fullness ............................................................. 7 - 3
7.06 Mechanical edge guide (PFAFF 3827--4/33) .................................................................. 7 - 3
7.07 Control Panel................................................................................................................. 7 - 4
7.07.01 Screen displays ............................................................................................................. 7 - 4
7.07.02 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 Tightening the V-belt .....................................................................................................8- 2
8.01.03 Fitting the top V-belt guard ............................................................................................ 8 -2
8.01.04 Mounting the bottom V-belt guard ................................................................................ 8 - 3
8.01.05 Fitting the synchronizer ................................................................................................. 8- 3
8.01.06 Connecting the plug-in connections and earth cables ................................................... 8 - 4
8.01.07 Fitting the reel stand ..................................................................................................... 8 - 5
8.02 Commissioning ............................................................................................................. 8 - 6
8.03 Switching the machine on/off ....................................................................................... 8 - 6

Contents
Contents ................................................................................. Chapter - Page
9Preparation .................................................................................................................. 9 - 1
9.01 Inserting the needle ...................................................................................................... 9 - 1
9.02 Winding the bobbin thread, adjusting the thread tension .............................................. 9 - 2
9.03 Removing/inserting the bobbin case ............................................................................. 9 - 3
9.04 Threading the bobbin case, adjusting the thread tension .............................................. 9 - 3
9.05 Threading the needle thread ......................................................................................... 9 - 4
9.06 Adjusting the needle-thread tension.............................................................................. 9 - 4
9.07 Pre-selecting the stitch length and fullnes .................................................................... 9 - 5
9.08 Entering the maximum speed ....................................................................................... 9 - 6
9.09 Entering the start and end backtacks ............................................................................ 9 - 6
9.10 Setting the edge guide .................................................................................................. 9 - 7
9.10.01 Mechanical edge guide (PFAFF 3827-4/33) ................................................................... 9 - 7
9.10.02 Pneumatic edge guide (PFAFF 3827-4/34) .................................................................... 9 - 7
10 Sewing ....................................................................................................................... 10 -1
10.01 Manual sewing (side seams) ....................................................................................... 10 - 1
10.02 Programmed sewing (shoulder seams) ....................................................................... 10 - 2
10.03 Examples of operating cycles ..................................................................................... 10 - 3
10.03.01 Sewing shoulder seams .............................................................................................. 10 - 3
10.03.02 Sewing side and shoulder seams in combination........................................................ 10 - 4
10.04 Error messages ........................................................................................................... 10 - 6
11 Care and Maintenance .............................................................................................. 11 - 1
11.01 Cleaning the machine.................................................................................................. 11 - 1
11.02 Oil level of the machine .............................................................................................. 11 - 2
11.03 Cleaning/lubricating the top feed joints ....................................................................... 11 - 2
11.04 Checking the air pressure ........................................................................................... 11 - 3
11.05 Emptying/cleaning the water container of the air filter/regulator ................................. 11 - 3
12 Adjustment ................................................................................................................ 12 - 1
12.01 Notes on adjustment................................................................................................... 12 - 1
12.02 Tools, gauges and other accessories for adjusting ...................................................... 12 - 1
12.03 Abbreviations .............................................................................................................. 12 -1
12.04 Check and adjustment aid ........................................................................................... 12 - 2
12.05 Adjusting the basic machine ....................................................................................... 12 - 3
12.05.01 Basic position of the machine ..................................................................................... 12 - 3
12.05.02 Preliminary adjustment of the needle height ............................................................... 12 - 4
12.05.03 Needle in needle-hole centre....................................................................................... 12 - 5
12.05.04 Neutral position of the bottom feed dog ..................................................................... 12 - 6
12.05.05 Feeding motion of the bottom feed dog ..................................................................... 12 - 7
12.05.06 Lifting motion of the bottom feed dog ........................................................................ 12 - 8
12.05.07 Height of the bottom feed dog .................................................................................... 12 - 9
12.05.08 Clearance between presser foot and needle plate ...................................................... 12 - 10
12.05.09 Stop in relation to the presser foot .............................................................................. 12 - 12
12.05.10 Top feed driving and connecting lever......................................................................... 12 - 13
12.05.11 Neutral position of the top feed dog............................................................................ 12 - 14

Contents
Contents ................................................................................. Chapter - Page
12.05.12 Feeding motion of the top feed dog ............................................................................ 12 - 15
12.05.13 Front linkage rod to top feed drive .............................................................................. 12 - 16
12.05.14 Top feed stroke ........................................................................................................... 12 - 17
12.05.15 Lifting motion of the top feed dog............................................................................... 12 - 18
12.05.16 Position of the top feed dog ........................................................................................ 12 - 19
12.05.17 Stitch length adjustment ............................................................................................. 12 - 20
12.05.18 Synchronizing the top feed dog ................................................................................... 12 - 21
12.05.19 Eccentric hook shaft bearing and hook-to-needle clearance ........................................ 12 - 22
12.05.20 Needle bar rise, readjustment of the needle height and bobbin case position stop .... 12 - 23
12.05.21 Bobbin opener height .................................................................................................. 12 - 24
12.05.22 Adjustment of the bobbin opener................................................................................ 12 - 25
12.05.23 Bobbin case opener .................................................................................................... 12 - 26
12.05.24 Needle thread tension release .................................................................................... 12 - 27
12.05.25 Thread check spring .................................................................................................... 12 - 28
12.05.26 Bobbin winder ............................................................................................................. 12 - 29
12.05.27 Position of the top feed dog in relation to the sewing foot.......................................... 12 - 30
12.05.28 Top feed dog and sewing foot pressure...................................................................... 12 - 31
12.05.29 Limiting the stitch length............................................................................................. 12 - 32
12.06 Adjusting the thread trimmer -900/99 ......................................................................... 12 - 33
12.06.01 Lateral adjustment of the thread catcher .................................................................... 12 - 33
12.06.02 Front reversal point of the thread catcher ................................................................... 12 - 34
12.06.03 Knife to needle clearance ............................................................................................ 12 - 35
12.06.04 Manual trimming control ............................................................................................. 12 - 36
12.06.05 Needle thread tension release .................................................................................... 12 - 37
12.06.06 Mounting and dismounting the control unit................................................................. 12 - 38
12.07 Parameter settings...................................................................................................... 12 - 39
12.07.01 Example of a parameter input ..................................................................................... 12 - 39
12.07.02 Selecting the user level ............................................................................................... 12 - 40
12.07.03 List of parameters ....................................................................................................... 12-41
12.08 Explanation of the error signals ................................................................................... 12 - 45
12.09 Hardware-test ............................................................................................................. 12 - 46
12.09.01 Carrying out the hardware test ................................................................................... 12 - 46
12.09.02 Test block 1 - inputs .................................................................................................... 12-46
12.09.03 Test block 2 - outputs.................................................................................................. 12 -47
12.09.04 Test block 3 - speed control unit ................................................................................. 12 - 47
12.09.05 Test block 4 - actual value transmitters ....................................................................... 12 - 47
12.09.06 Test block 5 - light barrier ............................................................................................ 12 -48
12.09.07 Test block 6 - thread monitor (only on subclass -926/06) ............................................ 12 - 48
12.09.08 Test block 7 - data transfer.......................................................................................... 12 - 48
12.10 Connection plan for X5 plug ........................................................................................ 12 - 49
14 Wearing parts ............................................................................................................ 14 - 1
15 Circuit diagrams ........................................................................................................ 15 - 1

Safety
1 - 1
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, observe also 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 organisations 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, presser foot, needle plate, feed dog or
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!
●When servicing or carrying out repairs on pneumatic devices, the machine is to be
removed from the compressed air supply! The only exceptions to this are adjustments
and function checks carried out by 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! Exceptions to this are in accordance with 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 constructual characteristics of the machine.
We shall not be liable for any damage which may be caused by non-original parts.

Safety
1 - 2
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 a component 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 authorised persons operate and
work on the machine.
Further information can be obtained at your PFAFF agent.
Caution
Do not operate without finger guard and safety devices.
Before threading, changing bobbin and needle, cleaning
etc. switch off main switch.
I

Safety
1 - 3
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 taking care of faults arising in the sewing area.
The operating personnel is obliged to observe the following points and must:
●always observe the Notes on Safety in the Instruction Manual!
●never use any working methods which could limit the level of safety in using the
machine!
●not wear loosely fitting clothing or jewellery such as chains or rings!
●also ensure that only authorised 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 of the On/Off switch before carrying out adjustments or repairs and ensure that it
cannot be switched on again unintentionally!
●never work on parts which are still connected to the power supply! Exceptions are
contained in the regulations EN 50110.
●when servicing or carrying out repairs on pneumatic devices, remove the machine from
the compressed air supply! The only exceptions to this are function checks.
●replace the protective coverings and close the electrical control box after all repairs or
maintenance work!

Safety
1 - 4
1.06 Danger
A working area of 1 metre 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 or in the needle plate area while adjusting the
machine settings! Objects can become trapped or be slung away! Danger of
injury!
Do not operate the macine without finger guard 1!
Danger of injury by the needle!
Do not operate the machine without take-up lever guard 2!
Danger of injury due to movement of the take-up lever!
Do not operate the machine without belt guards 3und 4!
Dange of injury by the rotating v-belt!
Do not operate the machine without tilt lock 5!
Danger of crushing between sewing head and table!
Fig. 1 - 01
3
2
1
4
54-66a
5

Proper use
2 - 1
2 Proper use
The PFAFF 3827 is a sewing machine for the closing of side and shoulder seams on
outerwear (e.g. suit jackets, skirt suits, overcoats). The shoulder seams, including bartacks
and application of fullness are produced automatically as mirror images. On the side seams
the fullness to be applied is switched on using a manual switch.
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 ▲
Stitch type: ................................................................................................ 301 ( lockstitch )
Model: ............................................................................................................................... B
Max. speed:: ................................................................................................... 4800 s.p.m.◆
Needle system: ........................................................................................................ 134 KK
Needle size in 1/100 mm:........................................................................................80 - 100
Top feed stroke: ......................................................................................................... 2 mm
Clearance under the presser foot: .............................................................................. 7 mm
Max. stitch length: .................................................................................................. 4.5 mm
Connection data:
Operating voltage: ............................................230 V ± 10%, 50/60 Hz, alternating voltage
Max. power: ............................................................................................................. 400 VA
Fuse protection: ............................................................................................ 1 x 16 A, inert
Working air pressure: .................................................................................................. 6 bar
Air consumption: .................................................................................... ~1,6 l / work cycle
Noise data:
Emission sound pressure level at the workplace with
a sewing speed of 4000 spm: .................................................................... LpA < 79 dB(A) ■
(Noise measurement in accordance with DIN 45 635-48-A-1, ISO 11204, ISO 3744, ISO 4871)
Machine dimensions:
Length: .................................................................................................. approx. 11365 mm
Width: ....................................................................................................... approx. 950 mm
Height(with reel stand): ........................................................................... approx. 1700 mm
Net weight: .................................................................................................. approx. 108 kg
Gross weight: ............................................................................................... approx. 230 kg
▲ Subject to alteration
■ KpA = 2,5 dB
◆Depending on the material, work operation

Disposal of Machine
4 - 1
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 mat-
erials.
The electrical equipment comprises plastic materials and copper.
●The machine is to be disposed of according to the locally valid pollution control regula-
tions; 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
5 - 1
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
6 - 1
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)

Controls
7 - 1
7.02 Pedal
The position of the presser foot
and the needle depend on the
selected functions, see Chapter
7.07 Control panel.
0 = Machine stop
+1 = Lower presser foot or sewing start
+2 = Sew
-1 = Raise presser foot
-2 = End bartack and trim thread
Fig. 7 - 02
0
-1 -2
+1
+2
Fig. 7 - 01
7 Controls
7.01 On/off switch
●Switch the machine on or off by turning
main switch 1.
1

Controls
7 - 2
7.03 Knee switch
●Press the knee switch 1to call up
programmed sewing (shoulder seam
program).
Fig. 7 - 03
1
Fig. 7 - 04
2
13
7.04 Keys on the machine head
Hand button 1= Reset; return to semi-
automatic operation.
Hand button 2= Turn fullness on and
off.
Hand button 2= Intermediate seam
backtacking. As long as
the key is pressed, the
machine sews in
reverse.

Controls
7 - 3
7.05 Adjustment lever for stitch length and fullness
●To adjust the stitch length, move stitch
length controls 1and 2together.
●Pre-select fullness with adjustment
lever 3.
Fig. 7 - 05
3
2
1
Fig. 7 - 06
7.06 Mechanical edge guide (PFAFF 3827--4/33)
Switching on the edge guide:
●Press knob 1in the direction of the arrow
until it locks into place.
Switching off the edge guide:
●Press down key 2.
21

Controls
7 - 4
10 3
7.07 Control panel
The control panel is used to create and alter seam programs, enter parameter values and
read error messages and service settings.
The control panel consists of display 1and the function keys described below. Display 1
consists of a two-row, alpha-numerical display with 16 symbols per row. The special
symbols 2, 3 and texts 4 show the respective status of the function keys and the operating
modes of the machine.
During the power-on phase the control panel automatically switches on all LCD segments
and the horn.
7.07.01 Screen displays
●Activated functions are displayed with a triangular marking 2below or next to the
respective function key.
●In the sewing mode all relevant sewing data is displayed and these can be changed
directly, depending on the status of the machine, see also Chapter 10 Sewing.
●During the parameter input the selected parameter number with the corresponding value
is displayed, see Chapter 12.07 Parameter settings.
7.07.02 Function keys
The function keys described below are used basically to switch machine functions on and
off.
If a corresponding value has to be set for the activated function, this is carried out with the
corresponding +/- key. For example, by pressing and holding the +/- key 5, the numerical
value 6shown above the key is changed slowly to begin with. If the +/- key 5 is held down
longer, the numerical value 6is changed more quickly.
5
1
23
6
4200
SPEED
4
6
5

Controls
7 - 5
Start backtacks
●If this key is pressed, the backtacks at the beginning of the seam (start backtacks) are
switched on or off. The number of forward stitches (A) or reverse stitches (B) for the start
backtacks can be changed by pressing the +/- key underneath. To convert from double
backtack to single backtack set the number of stitches for the corresponding seam
section at zero.
End backtacks
●If this key is pressed, the backtacks at the end of the seam (end backtacks) are switched
on or off. The number of reverse stitches (C) or forward stitches (D) can be changed by
pressing the +/- key underneath. To convert from double backtack to single backtack set
the number of stitches for the corresponding seam section at zero.
Needle position
●If this key is pressed the "needle raised after sewing stop" function is switched on or off.
When the function is switched on, the needle positions at t.d.c. after sewing stops
(take-up lever t.d.c.)
Foot position after stop
●If this key is pressed the "foot raised after sewing stop" function is switched on or off.
When the function is switched on, the presser foot is raised after sewing stops.
Foot position after trimming
●If this key is pressed the "foot raised after thread trimming" function is switched on or off.
When the function is switched on, the presser foot is raised after thread trimming.
Thread trimmer
●If this key is pressed the thread trimming function is switched on or off.
Speed
●If this key is pressed the corresponding function is switched on or off. When the function
is switched on, the current seam section is sewn at the speed entered irrespective of the
pedal position (Parameter "585", see Chapter 12.07 Parameter settings).
Reverse sewing
●If this key is pressed the corresponding function is switched on or off. When the function
is switched during programmed sewing, the corresponding seam section is sewn in
reverse.
Manual seam end
●No function

Controls
7 - 6
Programmed stop
●If this key is pressed the corresponding function is switched on or off. When the function
is switched on, the machine stops automatically at the end of a seam section.
Sensor
No function (in programmed sewing the sensor is activated automatically)
Stitch counting
●If this key is pressed the corresponding function is switched on or off. When the function
is switched on, the machine moves to the next seam section after sewing the number of
stitches entered.
TE/Speed
●If this key is pressed once while the machine is in the sewing mode, the input menu for
the maximum speed is selected. If no input is made within 5 seconds, the sewing mode
is selected again.
●If this key is pressed twice (within 5 seconds) while the machine is in the sewing mode,
the machine switches to parameter input.
●If this key is pressed once while the machine is in the parameter input mode, the altered
values are stored and the sewing mode is selected.
Scrolling
●If this key is pressed the machine scrolls among the displays (parameters), if more than
4 parameters are directly accessible in the sewing mode.
PM
●If this key is pressed, the machine switches from programmed sewing (shoulder seam)
to manual sewing (side seam and shoulder seam) und vice versa. The selected mode is
shown on the display with the corresponding symbol, see Chapter 10 Sewing. The
specific program parameters are listed in the alphanumerical section of the display.
F1
No function
F2
No function
F3
No function
F4
No function