Pfaff 3834-3/11 User manual

3834-3/11
Instruction manual
For adjustment of the sewing machine use
service manual Pfaff 1493 E.
296-12-17 378
Betriebsanleitung engl. 01.94

2 PFAFF
Notes on safety
●The machine must only be commissioned in full knowledge of the instruction manual and operated
by persons with appropriate training.
●Before putting into service also read the safety notes and the instruction manual of the motor
supplier.
●The machine must be used only for the purpose intended.
Use of the machine without the safety devices belonging to it is not permitted.
●When gauge parts are exchanged (e.g. needle, presser foot, needle plate, feed dog and bobbin)
during threading, when the workplace is left, and during service work, the machine must be isolated
from the mains by switching off the main switch or disconnecting the mains plug.
●On mechanically operated clutch motors without start inhibitor it is necessary to wait until the motor
has stopped.
●General servicing work must be carried out only by appropriately trained persons.
●Repairs, conversion and special maintenance work must only be carried out by technicians or persons
with appropriate training.
●For service or repair work on pneumatic systems the machine must be isolated from the compressed
air supply system.
Exceptions to this are only adjustments and function checks made by appropriately trained
technicians.
●Work on the electrical equipment must be carried out only by electricians or appropriately trained
persons.
●Work on parts and systems under electric current is not permitted, except as specified in regulations
EN50110.
●Conversions or changes to the machine must be made only on adherence to all safety regulations.
●For repairs, only replacement parts approved by us must be used.
●Comissioning of the sewing head is prohibited until such time as the entire sewing unit is found to
comply with EC regulations.
Meanings of the symbols:
Danger spot!
Items requiring special attention.
Danger of injury to operative
service staff.
Be sure to observe and adhere to these notes!

PFAFF 3
Contents
Notes on safety ............................................................................................................................ 2
Starting up .................................................................................................................................. 5
Encoder adjustment ..................................................................................................................... 6
Belt guard ................................................................................................................................... 7
Oiling ......................................................................................................................................... 8
Greasing the bevel gears ............................................................................................................... 8
Air filter/Lubricator ....................................................................................................................... 8
Care ............................................................................................................................................ 9
Lifting and disengaging the roller presser ....................................................................................... 9
Inserting the needle ..................................................................................................................... 10
Winding the bobbin thread........................................................................................................... 10
Changing the bobbin and threading the bobbin thread.................................................................... 11
Threading the needle thread .................................................................................................... ..... 12
Regulating the needle thread tension ............................................................................................13
Regulating the bobbin thread tension ............................................................................................13
Switching the machine on/off ....................................................................................................... 14
Pedal functions ........................................................................................................................... 14
Application ................................................................................................................................. 15
Specifications ............................................................................................................................. 15
Functions of the keys on the control panel ..................................................................................... 18
Menu functions - overview ........................................................................................................... 19
Brief describtion of display texts ................................................................................................... 20
Input for programming ................................................................................................................ 23
Main functions ............................................................................................................................ 24
Programming options.................................................................................................................. 25
Program 0 .................................................................................................................................. 25
Programming procedure - programs 1 and 2 .................................................................................. 26
Programming procedure of programs 3 to 24 ................................................................................. 27
Determining the roller presser feed motion for fullness application................................................... 32
Basic sizes and size tables for grading ........................................................................................... 32
Selecting a program number ........................................................................................................ 34
Sleeve selection .......................................................................................................................... 34
Size selection .............................................................................................................................. 35
Changing the programmed roller presser feed motion .................................................................... 35
Changing the roller presser feed motion within a certain seam segment...........................................36
Reworking beginning with a certain seam segment......................................................................... 36
Editing the length of a learned seam segment ................................................................................ 37
Example seam: jacket sleeve.................................................................................................... ..... 38
Changing the battery of the memory card ...................................................................................... 39
Memory Card (optional) ............................................................................................................... 40
List of error messages.................................................................................................................. 42
Flow charts for programming ....................................................................................................... 44
Subject to technical modifications Status11.93

4 PFAFF

PFAFF 5
Starting up
●Before the machine is put into operation for the first time, clean it thoroughly and oil it (see page 8).
●Check whether the belt guard is mounted (see page 7).
●Before the machine is switched on, connect compressed air and check air filter/lubricator (see
page 8).
●Ask a technician to check if the motor may be operated with the available mains voltage and if it is
properly connected in the junction box.
Never operate the machine if this is not the case.
●The encoder adjustment must only be carried out by persons with appropriate training
(see page 6).
●The maximum sewing speed is 3200 s.p.m.

6 PFAFF
Encoder adjustment
This work should only be carried out by a qualified technician.
1 Preliminary work
- Plug the 6 channel plug of the encoder into the motor control box.
- Turn master switch on.
2 Setting
The settings on the input panel are as follow:
press -LED off.
INPUT
appears in the display
press
SERVICE
press
PARAMETER 618
press - until display is at 700.
PARAMETER 700
press
Turn the hand wheel slowly in the direction of rotation (at least one turn!) until the point of the
needle is directly above the needle hole.
press
Switch to sewing mode.
press -LED on.
Operate pedal. The reference position (parameter 700) and the positions needle bottom dead
centre (b.d.c) (702) and needle top dead centre (t.d.c.) (703) have now been set.
Further parameter settings can be carried out in the main menu " 6 SERVICE ", sub function " 2
SEW. MOTOR " as described above (see also "Menu functions - overview" page 19).

PFAFF 7
The following parameters of the part function "SEWING MOTOR" are possible
●Parameter 618, reverse on/off.
●Parameter 700, reference position of the needle with automatic generation of the needle position
down (parameter 702) and needle position up (parameter 703).
●Parameter 702, needle position down.
●Parameter 703, needle position up.
●Parameter 718, after-brake of the sewing drive.
●Parameter 722, acceleration ramp of the sewing drive.
●Parameter 723, brake ramp of the sewing drive.
●Parameter 800, direction of rotation of the sewing drive.
●Parameter 801, reverse rotation angle.
Do not operate the machine without the
belt guard. Danger of accident!
Fig.1
1
2
3
4
5
6
7
7
1
Belt guard
Switch off the machine.
Above the table top
Slide the left and right hand part of the guard with
their slots behind the heads or rubber washers of
the retaining screws 1.
Attach spacer 2 onto the retaining screw 3 and
screw into the threaded hole 4.
Making sure that the lug 5 is behind the slot 6 and
in front of the spacer 2, adjust the belt guard and
tighten up screw 3.
Finally tighten up the screws 1 in the holes 7.
Beneath the table top
Adjust the belt guard so that both the motor disk
and the V belt run free and tighten up in this
position.

8 PFAFF
1
2
Fig.3Fig.2
Fig.4
Oiling
Switch off the machine.
Put a few drops of oil in hole 1 of the oil reservoir
each day.
Put 1 to 2 drops of oil in the hole 2 of the hook gib
each day.
Please note! Only use oil with a mean viscosity
of 22.0 mm²/sec. at 40°C and a density of
0.865g/m3at15°C.
Pfaff sewing machine oil no. 280-1-120 144.
Greasing the bevel gears
The bevel gears of the hook drive must be freshly
greased once a year.
Tilt the machine over backwards and apply a little
grease to the tooth flanks.
We recommend sodium grease with a drip-point
of about 150°C (part no. 280-1-120 243).
Lift the sewing head up with both hands.
Risk of crushing between the sewing
head and table top.
Air filter/lubricator
The pressure gauge must show a pressure of 6 bar.
If necessary have pressure set correctly.

PFAFF 9
Care
Switch off the machine.
Clean the hook and surrounding area each day -
more often when in continuous use.
Fig.5
Fig.6
1
Raising and disengaging the roller presser
Raise the hand lever at the back of the needle head.
Pull roller presser 1 lightly down and disengage it
to the left.

10 PFAFF
Inserting the needle
Switch off the machine.
Only use needle system 134-35.
Raise and disengage roller presser (see page 9).
Loosen needle retaining screw 1 and push needle
right in (the long groove must face to the left).
Tighten needle retaining screw 1 and re-engage the
roller presser.
1
Fig.8
Fig. 7
1
Winding the bobbin thread
Thread the bobbin thread as shown in fig. 8.
Thread tension (knurled screw 1).

PFAFF 11
Changing the bobbin and threading the
bobbin thread
Switch off the machine.
Open the bed cap, lift retainer 1, remove bobbin
case and thread as shown in fig. 9.
Insert bobbin case, return retainer 1 and close bed
cap.
1
Fig.9

12 PFAFF
1
Fig.10
Do not operate machine without the
take-up lever guard 1.
Danger of injury!
Threading the needle thread
Switch off the machine.
Thread the needle thread as shown in fig. 10.

PFAFF 13
Fig.11
Fig.12
Regulating the needle thread tension
Regulating the bobbin thread tension

14 PFAFF
Fig.18
Switching the machine on / off
0
1
23
Fig.19
Pedal functions
0 =inoperative position
1 =sewing
2 =to raise roller presser
3 =to trim sewing threads and to raise roller
presser
on
off

PFAFF 15
Application of PFAFF 3834-3/11
Single needle lockstitch post-bed high-speed seamer (post to the right of the needle) with wheel feed and
roller presser for insertion of pre-gathered and not pre-gathered sleeves.
Specification PFAFF 3834-3/11
Stitch type: 301 (Lock stitch)
Model: A
Hand wheel eff. diameter: 65 mm
Needle system: 134-35R
Workspace width: 245 mm
Workspace height: 115 mm
Fabric clearance: 9 mm
Post height: 180 mm
Bed plate dimensions: 518 x 177 mm
Maximum speed: 3200s.p.m.*
Workplace-related noise level at
a speed of 2700 s.p.m.: LpA = 80 dB (A)
Noise measurement according to DIN 45635-48-A-1
Net weight (head only): about 61 kg
Gross weight: about 71 kg
*depending on stitch length
Subject to modifications in design, weight and dimensions.

16 PFAFF

PFAFF 17
16 17
1
2
3
4
10 12
18
19 20
7
8
911
14
13
Fig.20
6
15
5
20 R1
+0.3 38
Programnumber
Selected size
Difference in roller presser motion
Segment display (R = right-hand sleeve, L = left-hand sleeve, K =Knee
switch for programs 1 and 2)

18 PFAFF
Functions of keys on the control panel
1 =Size selection (only possible in programs 3 to 24 with knee switch switched off).*
2 =To switch between right and left hand sleeve (only possible in programs 3 to 24 and when
program is set at sewing segment 1).
3 =To interrupt programmed sewing* (e.g. in order to trim the sewing threads in case of thread
breakage, possible in programs 1 to 24, see also pages 34 and 36).
4 = Thread trimmer ON*/OFF
5 =Direct input of roller presser feed motion (only possible in program 0)
6 = Direct input of wheel feed (only possible in program 0)
7 = To select a program number
8 =To select INPUT* or SEWING mode
9 = To verify the inputted program data
10 =ESC key
When actuated within menu, the program goes to the next higher level; when programming, it
moves one step back.
11 = To verify an error message and continue input.
12 = To recall default state or to cancel values when inputting numbers (only in INPUT mode).
13 =a) To increase roller presser feed motion by steps of 0.1 mm when program number 0 is selected.
=b) To select the following sewing segment when program interruption is selected (LED on key is on).
=c) To browse forwards in menu when INPUT mode is selected (LED on key is on).
=d) To increase roller presser feed motion by steps of 0.1 mm for all segments of a program when
program number 1 to 24 is selected and control is at program start.
14 =a) To decrease roller presser feed motion in steps of 0.1 mm when program number 0 is selected.
=b) To select previous sewing segment when program interruption is selected (LED on key is on).
=c) To browse backwards in menu when INPUT mode is selected (LED on key is on).
=d) To decrease roller presser feed motion in steps of 0.1 mm for all segments of a program when
program number 1 to 24 is selected and control is at program start.
15 =Dialog display
16 =Display for roller presser feed motion
17 =Display for wheel feed
Functions of keys on machine head
18 = To interrupt programmed sewing* (e.g. in order to trim the sewing threads in case of thread
breakage, possible in programs 1 to 24, also see pages 34 and 36).
Upper LED lights up when function is selected; lower LED lights briefly up when control switches to
the next sewing segment
19 = To decrease roller presser feed motion by steps of 0.1 mm for one segment of a program when
program number 1 to 24 is selected and the control is at the desired program segment. All other
functions same as key 13 item a to c.
20 = To increase roller presser feed motion by steps of 0.1 mm for one segment of a program when
program number 1 to 24 is selected and the control is at the desired program segment. All other
functions same as key 14 item a to c.
✵) LED lights up

PFAFF 19
Menu functions - overview
Input
1 Programming
2 Memory Card 1 Read program 1 One program
2 All programs
2 Write program 1 One program
2 All programs
3 Show free blocks
4 Format
5 Change battery
3 Switch functions 1 Knee switch
2 Languages 1 German
2 English
3 French
4 Italian
5 Spanish
6 Portuguese
4 Counters 1 Slow start stitches
2 Pedal parameters
5 Speeds 1 Maximum speed
2 Slow start speed
6 Service 1 Stepping motors 1 Roller presser
2 Feed wheel
3 All 1 one feed motion
2 continous feed
motion
2 Sewing motor
3 Cold start
4 Software version

20 PFAFF
Brief description of display texts
INPUT
1 PROGRAMMING
PROGRAM NO. _ _
SIZE _ _
STITCH LENGTH
SEGMENT _ _
FEED ROLL.PR.
SEAMLENGTH_ _ _MM
GRADING VAL. _ _MM
END OF SEAM
CONTINUE SEAM
END OF PROGRAM
TEACH
TEACH SEAM LE.
2 MEMORYCARD
1 READ PROGRAM
1 ONE PROGRAM
2 ALL PROGRAMS
2 WRITE PROGRAM
1 ONE PROGRAM
2 ALL PROGRAMS
OVERWRITE PROG. ?
OVERWRITE BLOCK ?
Input function
Program menu
Program number input
Size input
Wheel feed input
Segment number input
Roller presser feed motion input
Seam length input
Grading value input
Seam end selection
Selection seam continuation
Program end selection
Teach-in function
Learn seam length selection
Menu memory card
Read program function
Read one program
Read all programs
Memory card sub-function write program
Write one program
Write all programs
Query - overwrite program?
Query - overwrite block?