Pfaff 3811-2/45, 3811-11/43, 3811-13/45, 3811-11/45 Instruction Manual
3811
- 2/45
- 11/43
-11/45
-1 3/45
Instruction manual
● For machines with a thread trimmer use
the Maintenance Manual -900/71 for the
PFAFF 5480.
● Use the motor manufacturer's technical
literature for the motor.
296-12-17 514
Betriebsanleitung engl. 06.97
2
Notes on safety
l The machine must only be commissioned in full knowledge of the instruction manual and operated by
persons with appropriate training.
l Before putting into service also read the safety rules and instructions of the motor supplier.
l The machine must be used only for the purpose intended.
Use of the machine without the safety devices is not permitted.
Observe all the relevant safety regulations.
l When gauge parts are exchanged (e.g. needle, presser foot, needle plate, feed dog and bobbin) when
threading, when the workplace is left, and during service work, the machine must be
disconnected from the mains by switching off the master switch or disconnecting the mains plug.
l On mechanically operated clutch motors without start inhibitor it is necessary to wait until the motor
has stopped.
l Daily servicing work must be carried out only by appropriately trained persons.
l Repairs, conversion and special maintenance work must only be carried out by technicians or persons
with appropriate training.
l For service or repair work on pneumatic systems the machine must be disconnected from the compressed
air supply system.
Exceptions to this are only adjustments and function checks made by appropriately trained technicians.
l Work on the electrical equipment must be carried out only by electricians or appropriately trained persons.
l Work on parts and systems under electric current is not permitted, except as specified in regulations
EN 50110.
l Conversions or changes to the machine must be authorized by us made only adherence to all safety
regulations.
l For repairs, only replacement parts approved by us must be used.
l Comissioning of the sewing head is prohibited until such time as the entire sewing unit is found to
comply with EC directives.
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!
3
Inhaltsverzeichnis
Notes on safety................................................................................................................ 2
What the symbols mean.................................................................................................. 2
Fields of application.......................................................................................................... 5
1 Technical data .................................................................................................................. 5
2 Operation elements and optical displays.......................................................................... 6
3 Initial check ...................................................................................................................... 8
4 Installing the machine ...................................................................................................... 8
5 Connecting compressed air and electricity ...................................................................... 8
.1 Compressed air................................................................................................................8
.2 Electricity ......................................................................................................................... 8
6 Switching the machine on................................................................................................ 8
7 Switching the machine off ............................................................................................... 8
8 Check ............................................................................................................................. 10
.1 Oil level in the sewing machine ..................................................................................... 10
.2 Direction of rotation ....................................................................................................... 10
9 Inserting the needle ....................................................................................................... 10
10 For your attention before the initial operation ................................................................ 10
11 Needle thread and hook thread...................................................................................... 12
.1 Threading the needle thread .......................................................................................... 12
.2 Adjusting the needle thread tension .............................................................................. 12
.3 Threading the hook thread ............................................................................................. 12
.4 Adjusting the hook thread tension ................................................................................. 12
12 Top feed pressure and presser foot pressure ................................................................ 14
.1 Adjusting the top feed pressure..................................................................................... 14
.2 Adjusting the presser foot pressure............................................................................... 14
13 Adjusting the stitch length ............................................................................................. 14
14 Preparing for adjustments.............................................................................................. 16
15 Needle position in the needle hole................................................................................. 16
.1 Across the sewing direction........................................................................................... 16
.2 With the sewing direction .............................................................................................. 16
16 Preadjusting the needle height....................................................................................... 18
17 Bottom feed settings ..................................................................................................... 20
.1 Zeroing the main feed dog ............................................................................................. 20
.2 Limiting the shortest stitch length to 2 mm................................................................... 20
.3 Main feed and differential feed synchronicity ................................................................ 22
.4 Lateral motion of main and differential feeds................................................................. 24
.5 Lifting motion of main and differential feeds.................................................................. 26
.6 Setting the feed dog ...................................................................................................... 28
18 Top feed settings ........................................................................................................... 30
.1 Synchronicity of top and bottom feeds .......................................................................... 30
.2 Vibrating presser - lifting motion .................................................................................... 32
.3 Vibrating presser - stroke ............................................................................................... 32
.4 Front connecting rod to the top feed drive..................................................................... 34
19 Basic stitch length.......................................................................................................... 36
.1 Adjust basic stitch length to 3 mm ................................................................................ 36
4
20 Presser foot settings...................................................................................................... 38
.1 Clearance between presser foot and needle plate......................................................... 38
.2 Presser foot stroke with the automatic presser foot lifter ............................................. 38
.3 Aligning the presser foot ................................................................................................ 40
21 Hook settings.................................................................................................................42
.1 Hook - lateral motion ...................................................................................................... 42
.2 Adjusting the hook height .............................................................................................. 44
.3 Adjusting the hook angle................................................................................................ 46
.4 Hook-to-needle clearance in sewing direction................................................................ 46
.5 Hook-to-needle clearance in hook direction (across the sewing direction)..................... 46
.6 Hook motion .................................................................................................................. 48
.7 Needle height and hook-to-needle clearance ................................................................. 50
22 Rear needle guard.......................................................................................................... 52
.1 Adjusting the height of the rear needle guard ................................................................ 52
.2 Clearance between rear needle guard and needle ......................................................... 52
23 The hook-eccentric guard............................................................................................... 52
24 Front needle guard ......................................................................................................... 54
.1 Adjusting the height ....................................................................................................... 54
.2 Lateral adjustment ......................................................................................................... 54
25 Needle thread puller....................................................................................................... 56
26 Needle thread regulator ................................................................................................. 56
27 Adjustable thread guide ................................................................................................. 56
28 Hook thread regulator .................................................................................................... 58
29 Hook thread controller.................................................................................................... 58
30 Hook thread puller.......................................................................................................... 58
31 Quick adjustment of the differential for altering the gathering intensity ........................ 60
.1 Zeroing the differential quick adjustment ....................................................................... 60
.1.1 Rough adjustment at the Angle transmitter ................................................................... 60
.1.2 Fine adjustment at the poti “0” ..................................................................................... 60
.2 Key allocation for positioning the cam against the actuating lever................................. 62
.2.1 Setting the gathering level of key “1”............................................................................ 62
.2.2 Setting the gathering levels ........................................................................................... 62
32 Edge trimmer................................................................................................................. 64
.1 Trimming motion............................................................................................................ 64
.2 Zero point ....................................................................................................................... 64
.3 Knife height .................................................................................................................... 64
.4 Aligning the upper knife in sewing direction .................................................................. 66
.5 Aligning the upper knife across the sewing direction..................................................... 66
.6 Aligning the stop eccentric............................................................................................. 66
33 Tape brake ..................................................................................................................... 68
.1 Switching on ..................................................................................................................68
.2 Switching off.................................................................................................................. 68
.3 Adjusting the brake intensity.......................................................................................... 68
.4 Pre-tension..................................................................................................................... 68
34 Care and maintenance ................................................................................................... 70
.1 Sewing machine ............................................................................................................ 70
.2 Maintenance unit ........................................................................................................... 70
.3 Lubrication recommendation.......................................................................................... 71
5
1 Specifications for the PFAFF 3811-../..
Sewing machine head : for -2/45: .................... 5487/5489-814/01 N
for -11/43 und -11/45:.. 5487/5489-814/01
for -13/45: .................. 5487/5489-814/01-731/12
Stich type : 401
Max. s.p.m. : 3200 min
-1
Basic stitch length : 3 and 4 mm ( -2/45 2,2 mm)
Differential stitch length : 8 mm ( -2/45 6 mm)
Needle system : Leather: 4463KKD
Fabric: 4463-35
Needle size : 80 - 110 depending on material
Trimming margin : (only -13/45) 6mm
Presser foot clearance : 7mm
Sewing motor : QE 6040, Q 31 PLUS, P 40 SE, Q 40 SE
Input rating : 0,8 kW
Power supply : E 230 Volt, 50/60Hz
Working air pressure : 6 bar
Air consumption : ~0,3 - 0,5 Normlitre per work cycle
Work place related emission level : at s.p.m. n=2600min-1: LpA<79 dB(A). Noise level
measurement in accordance with DIN 45635-48-A-1
Dimensions : LxBxH (1250 x 600 x 1700mm; incl. spool holder)
Weight : Net: 140 kg
Subject to alterations Status 06.94
Fields of application
PFAFF 3811-2/45
-11/43
-11/45
Integrated sewing unit for working fullness into a material ply
PFAFF 3811-13/45
Integrated sewing unit for working fullness into a material ply with simultaneous edge
trimming
6
Key panel
Potentiometer 0-15
for adjusting the fullness as
allocated to the numbered keys
Foot pedal
0 = Foot pedal resting position
+ = Foot pedal forwards
+1 = Presser foot down
s
+2 = Sewing
- = Foot pedal reverse
-1 = Presser foot up s, needle position
-2 = Trim thread (optional)
Presserfußposition
s
Bi02-10
On/off switch
For switching the entire
work station on and off. The
version depends on the
motor.
Quick digital motor control panel
(see technical literature from the
motor manufacturer)
Knee lever for fullness
By pressing the knee lever you achieve the following results:
on the -2/45: switching between the two fullness levels which
are set with the keys and
on the -11/43, -11/45, -13/45:
switching between the last value selected with a
numbered key and sewing without fullness.
s
= in accordance with the switch setting on
the motor control panel (see technical
literature from the motor manufacturer)
2 Operation elements and optical displays
Bi02-01
7
Key panel -2/45
(Key activ = LED on)
Key panel -11/43; -11/45; -13/45
Tape brake on/off (optional)
This key is also on the -11/43, -11/45 and -13/45
even when there is no tape brake installed.
In this case it has no function whatsoever.
The tape brake can be installed at a later date.
Fullness 0
Sewing without fullness
By pressing the
key you switch to
“sewing without fullness”.
The key is activated automatically when
the machine is switched on.
(except on -2/45)
Numbered keys for fullness levels
Basic stitch length: 4 mm
By pressing one of the keys to you switch to the
basic stitch length of 4 mm.
With keys to , the fullness levels set with the
potis “1” to “9” can be called up.
to
Numbered keys for fullness levels
Basic stitch length: 3 mm
By pressing one of the keys
to you switch to the
basic stitch length of 4 mm.
With keys
to , the fullness levels set with the
potis “10” to “15” can be called up.
to
Edge trimmer on/off
(only on -13/45)
This key is also on the other sub-classes but
it is without function.
The edge trimmer cannot be installed later.
for setting 2 fullness levels which can be
switched to and from with the knee lever.
(only -2/45)
Example: if you wish to switch between key
and key .
l Press the key, press the key
- The fullness level of the
key is
now programmed as the
upper
gathering level.
l Press the key, press the key
- The fullness level of the
key is
now programmed as the
lower
gathering level.
for switching from a numbered key to the fullness level of the next lowest numbered key.
Example: the
key is activated (LED on)
the key is pressed
- Machine switches to the fullness level
of key
for switching from a numbered key to the full-ness
level of the next highest numbered key.
Example: the key is activated (LED on)
the key is pressed
- Machine switches to the fullness level
of key
Bi02-02.CDR
Bi02-03.CDR
8
3 Initial check
After unpacking the machine and before operating it for the first time, check that it has not
been damaged during transport.
If any damage has occurred, inform the forwarding company and your Pfaff agent immediately.
4 Installing the machine
Place the machine in the desired position on a horizontal surface.
5 Connecting compressed air and electricity
5.1 Compressed air
Connect the compressed air hose (6 mm internal diameter) to coupling 1 (diag. 1).
Minimum pressure in system: 7 bar
Working pressure: 6 bar
Pressure regulation: adjusting knob 2
5.2 Electricity
.1 The admissable working voltage (arrow in fig. 3) is indicated on the specification plate.
.2 Never operate the machine if the supply voltage and the working voltage are not the
same! (circuit diagram!)
.3 Only plug the machine into an earthed power socket.
6 Switching the machine on
.1 Open the air pressure at the main conductor.
.2 Check the working pressure: 6 bar (Manometer 3; fig. 1)
.3 Adjust if necessary (adjustment knob 2).
.4 Switch on the machine (switch 4 to “|”; fig. 2)
Note: Other switch combinations are possible.
E.g. Switch on the machine = Press the “|” key.
7 Switching the machine off
Switch 4 to “O” (fig. 2).
Note: Other switch combinations are possible.
E.g. Switch on the machine = Press the “0” key.
9
1
1
2
3
-1/..
Bi34-01.CDR
2
4
3
Bi03-03.CDR
10
8 Checks
8.1 Oil level in the sewing machine
When necessary, fill by pouring oil through hole 1 (fig. 1) in the oil-level sight glass.
We recommend Pfaff sewing-machine-oil, article number 280-1-120 or an oil with a
mean viscosity of 22.0 mm2/s at 40°C and a density of 0.865 g/cm3.
8.2 Direction of rotation
Requirement: The handwheel must turn in the direction of the arrow (fig. 2).
.1 Switch on the machine.
.2 Lift the presser foot with the hand lever.
.3 Press the foot pedal lightly (+1) forwards (fig. 3).
.4 If the direction of rotation is wrong, see the technical literature from the motor manufacturer;
parameter 800.
9 Inserting the needle
.1 Switch the machine off (mains switch).
.2 Slide the needle bar into position until it stops (long groove facing the operator).
10 For your attention before the initial operation
Oil the connections (arrows in fig. 4) of the top feed a little.
For the first 2 weeks of operation, only run the machine up to 3/4 of its maximum
speed.
11
4
1
Min. Oil level
Max. Oil level
1
2
Bi08-01
Bi18-05
Bi08-04.CDR
Bi02-01
3
12
11 Needle thread and hook thread
11.1 Threading the needle thread
.1 Turn the machine off (mains switch).
.2 Thread the needle in accordance with fig. 1 (taking care to maintain the tension; Chapter 11.2)
.3 Pull the needle thread approx. 7 cm (2 3/4 inches).
11.2 Adjusting the needle thread tension
Milled nut 1 (fig. 1)
+ = more tension
- = less tension
11.3 Threading the hook thread
.1 Turn the machine off (mains switch).
.2 Remove cover 2 (fig. 1) (catch 3)
.3 Thread the hook thread in accordance with fig. 2 and 3.
11.4 Adjusting the hook thread tension
Milled nut 4 (fig. 2)
+ = more tension
- = less tension
13
3
2
1
+
-
+
-
4
1
Bi11-01.CDR
2
3
Bi11-02
Bi11-04 Bi11-03
ca. 7cm
14
12 Top feed pressure and presser foot presser
Requirement: The pressure from the top feed 1 (fig. 2) and that of the presser foot should
be adjusted so that the workpiece is fed perfectly at all sewing speeds.
12.1 Adjusting the top feed pressure
Screw 3 (fig. 1)
+ = more tension
- = less tension
12.2 Adjusting the presser foot pressure
Milled ring 4 (milled nut 5)
+ = more tension
- = less tension
13 Adjusting the stitch length
Adjusting lever 6 (fig. 3)
15
2
Bi12-02.CDR
Bi12-03.CDR
3
6
1
2
45
1
3
+
-
+
-
Bi12-01.CDR
16
14 Preparing for adjustments
Note: The bearing disc 1 (fig. 1) is provided with four holes so that the machine can be set at the
required needle bar position.
After positioning the needle bar (handwheel) insert the cylindrical pin 2 into the desired hole
so that it sticks securely in the recess behind the bearing disc, thus ensuring that the
selected setting is fixed.
15 Needle position in the needle hole
Note: For the following adjustment it is recommended to:
- remove the presser foot
- insert a new needle.
15.1 Across the sewing direction
Requirement: The needle 3 (fig. 2) should enter the middle of the needle hole across the
sewing direction.
.1 Loosen screws 4 and 5 (fig. 4).
.2 Move the needle bar frame 6 (fig. 3) in accordance with the requirement.
.3 Tighten screws 4 and 5 (fig. 4).
15.2 With the sewing direction
Requirement: Clearance between the needle 3 (fig. 2) and the front edge of the needle hole
should be approx. 0.8 mm.
.1 Loosen screws 4 and 5 (fig. 4).
.2 Swivel the needle bar frame 6 (fig. 3) in accordance with the requirement.
.3 Tighten screws 5 and 7 (fig. 4).
ø5mm
21
Bi14-01
1
17
4
Bi14-04
5
Bi14-05
Schematic diagram
7
6
Bi14-03
3
6
4
5
7
4
7
5
0,8mm
Bi14-02.CDR
2
3
18
16 Preadjusting the needle height
Requirement: At the top dead centre of the needle bar (= adjustment hole “1”; fig.1), the
distance between the top edge of the needle plate and the point of the needle
must be 11 mm (approx. 1/2 inch) (fig. 2).
.1 Bring the needle bar 1 (fig. 3) to its top dead centre (handwheel).
.2 Insert the cylindrical pin (see chapter 14) in hole “1” (fig. 1) of the bearing disc
- the machine is blocked.
.3 Move the needle bar 1 (fig. 3) in accordance with the requirement (screws 2).
.4 Remove the cylindrical pin.
19
Bi01-01
1
1
2
Bi16-02.CDR
11mm
Bi14.03
3
1
2
20
2
1
Bi14-02H.CDR
Bi12-03.CDR
1
6
17 Bottom feed settings
17.1 Zeroing the main feed dog
Requirement: With the stitch length set at “0” (stitch length lever 1, fig. 1), the main feed
dog 6 (fig. 2) should not move laterally.
.1 Loosen limiting screw 2 (fig. 3) to such an extent as that the stitch length “0” can be set with the
stitch length adjustment lever 1 (fig. 1).
.2 Set the stitch length at “0”.
.3 Loosen the clamp screw 3 (fig. 4) just far enough so that the reversing crank can only be turned on its
shaft using a small amount of force.
.4 Note: In order to be able to see more effectively that the feed is at a standstill, insert a
screwdriver in the clamp slot of the feed crank 5 (fig. 5).
.5 While continually turning the handwheel, change the position of the reversing crank 4 (fig. 4) in such a
way that the main feed dog (fig. 2) does not move laterally i.e. the screwdriver in the clamp slot of the
feed crank 5 (fig. 5) does not move.
.6 Tighten the clamp screw 3 (fig. 4).
.7 Carry out a check (remove the screwdriver from the clamp slot).
.8 Carry out the adjustment in accordance with chapter 17.2.
17.2 Limiting the shortest stitch length to 3 mm
Tighten the limiting screw 2 (fig. 3) enough so that no stitch length shorter than 3 mm can be set with
the stitch length adjustment lever 1 (fig. 1).
21
5
Bi17-03.CDR
3
4
Bi17-04.CDR
2
Bi17-03
34
4
Bi17-05x.CDR
5
22
17.3 Main feed and differential feed synchronicity
Requirement: at:
- stitch length 4 mm
- cam setting “0”
both bottom feed dogs (main feed dog 6 and differential feed dog 7; fig. 6)
must make the same movement when the handwheel is turned.
.1 Set the stitch length at 4 mm (stitch length adjustment lever 1; fig. 7).
.2 Set the control cam 8 (fig. 8) at “0” (turn cam carrier 9 on the shaft).
Note: With the control cam set at “0”, the actuating lever 10 must have a little bit of play;
see arrow in fig. 8.
.3 Loosen clamp screw 11 (fig. 9) just enough so that the reversing crank 12 can only be turned on its
shaft using much force.
.4 While continuing to turn the handwheel, change the position of the reversing crank 12 (fig. 10)
so that the main feed dog 6 (fig. 6) and the differential feed dog 7 carry out the same motion.
.5 Tighten clamp screw 12 (fig. 10).
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