Pfaff 3806-12/22 Guide
ADJUSTMENT MANUAL
296-12-19 448/002
Justieranleitung engl. 04.2020
This instruction manual applies to
machines from the serial number 2 829 139 and
software version 0435/008 onwards
3806-12/22
-12/23
The reprinting, copying or translation of PFAFF AdJustment Manuals, whether in whole or in
part, is only permitted with our previous authorization and with written reference to the sour-
ce.
PFAFF Industriesysteme
und Maschinen GmbH
Hans-Geiger-Str. 12 - IG Nord
D-67661 Kaiserslautern
Inhaltsverzeichnis
Inhalt ....................................................................................... Seite
13 Adjustment ........................................................................................................................... 5
13.01 Tools, gauges and other accessories for adjusting ............................................................... 5
13.02 Abbreviations ......................................................................................................................... 5
13.03 Explanation of the symbols.................................................................................................... 5
13.04 Control and adjustment aids .................................................................................................. 6
13.05 Adjusting the basic machine .................................................................................................. 7
13.05.01 Position of the needle in the needle hole .............................................................................. 7
13.05.02 Preliminary adjustment of the needle height......................................................................... 8
13.05.03 Zeroing the bottom feed (on machines with closed gearcase) .............................................. 9
13.05.04 Zeroing the bottom feed (on machines with open gearcase)............................................... 10
13.05.05 Driver lever under the stitch shift key .................................................................................. 11
13.05.06 Feed driving motion ............................................................................................................ 12
13.05.07 Feed lifting height ................................................................................................................ 13
13.05.08 Feed lifting motion ............................................................................................................... 14
13.05.09 Limiting the stitch length ..................................................................................................... 15
13.05.10 Looper avoiding motion ....................................................................................................... 16
13.05.11 Looper motion...................................................................................................................... 17
13.05.12 Looper height and looper angle ........................................................................................... 18
13.05.13 Looper-to-needle clearance in sewing direction................................................................... 20
13.05.14 Looper-to-needle clearance crosswise to sewing direction ................................................. 21
13.05.15 Final adjustment of the needle height ................................................................................. 22
13.05.16 Height of rear needle guard ................................................................................................. 23
13.05.17 Clearance between rear needle guard and needle .............................................................. 24
13.05.18 Guard of looper-avoiding-motion eccentric........................................................................... 25
13.05.19 Take- up lever.......................................................................................................................26
13.05.20 Basic setting of the needle thread regulator and the thread guide...................................... 27
13.05.21 Looper thread regulator and looper thread take-up..............................................................28
13.05.22 Looper thread puller............................................................................................................. 29
13.05.23 Clearance between presser foot and needle plate .............................................................. 30
13.05.24 Top feed actuating link ......................................................................................................... 31
13.05.25 Neutral position of top feed.. ............................................................................................... 32
13.05.26 Feeding motion of the top feed dog ....................................................................................34
13.05.27 Vibrating presser clearance.................................................................................................. 35
13.05.28 Vibrating presser lifting motion ............................................................................................36
Inhaltsverzeichnis
Inhalt ....................................................................................... Seite
13.05.29 Position of vibrating presser ................................................................................................ 37
13.05.30 Eliminating differences in feed stroke lengths.....................................................................38
13.05.31 Pressure of vibrating presser and presser foot.................................................................... 39
13.06 Adjusting the top knife (chain cutter) ............................................................................... 40
13.06.01 Agjusting the diagonal position of the knife quide ...............................................................40
13.06.02 Adjusting the height of the top knife ...................................................................................41
13.06.03 Adjusting the top knife to the stationary knife.....................................................................42
13.06.04 Changing the top knife......................................................................................................... 43
13.07 Adjusting the light barrier..................................................................................................... 44
13.08 Parametereinstellungen....................................................................................................... 46
13.09. Internet-Update der Steuerung P40 CD............................................................................... 46
14 Stromlaufpläne ................................................................................................................. 47
Adjustment
5
13 Adjustment
Please observe all notes from Chapter 1 Safety of the instruction manual!
In particular care must be taken to see that all protective devices are refitted
properly after adjustment, see Chapter 1.06 Danger warnings of the instruc-
tion manual!
If not otherwise stated, the machine must be disconnected from the electrical
power supply. Danger of injury due to unintentional starting of the machine!
Notes on adjustment
All following adjustments are based on a fully assembled machine and may only be carried
out by expert staff trained for this purpose.
Machine covers, which have to be removed and replaced to carry out checks and adjust-
ments, are not mentioned in the text.
The order of the following chapters corresponds to the most logical work sequence for
machines which have to be completely adjusted. If only specific individual work steps are
carried out, both the preceding and following chapters must be observed.
Screws, nuts indicated in brackets ( ) are fastenings for machine parts, which must be
loosened before adjustment and tightened again afterwards.
13.01 Tools, gauges and other accessories for adjusting
Screwdrivers with blade width from 2to 10 mm
Spanners (wrenches) with jaw width from 7to 14 mm
1set Allen keys from 1.5 to 6 mm
1Metal rule (Order No. 08-880 218-00
1adjustment pin, 5 mm (Order No. 13-030 341-05 )
1clamp (Order No. 61-111 600-35/001
1gauge (Order No. 61-111 642-19
1Alignment gauge (Order No. 91-069 375-15)
1gauge foot (Order No. 61-111 639-20)
1gauge for the looper (Order No. 61-111 643-06)
13.02 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
13.03 Explanation of the symbols
In this adjustment manual, symbols emphasize operations to be carried out or important in-
formation. The symbols used have the following meaning:
Note, information
Service, repair, adjustment, maintenance
(work to be carried out by qualified staff only)
Adjustment
6
Fig. 13 - 01
13.04 Control and adjustment aids
By adjusting the holes 1, 3 and 4 with the adjustment pin ( 5 mm) the
required needle bar positions can be set exactly.
Turn the balance wheel until the needle by is approximately in the required postion.
Insert the adjustment pin into the appropriate adjustment hole and apply pressure.
Turn the balance wheel slightly backwards and forwards, until the adjustment pin slips
into the rear crank recess, blocking the machine.
Adjustment hole 1= top dead center of the needle bar (TDC)
Adjustment hole 3= bottom dead center of the needle bar (BDC)
Adjustment hole 4= 0.8 mm before the top dead center of the needle bar (0.8 before TDC)
1
3
4
Adjustment
7
1
3
4
Fig. 13 - 02
1
3
2
13.05 Adjusting the basic machine
13.05.01 Position of the needle in the needle hole
Requirement
1. The needle 6must be centered in the needle hole in a crosswise direction.
2. The distance between needle 6and the front edge of the needle plate must be ap-
prox. 0.8 mm.
Loosen screws 1, 2, 3 and 4.
Shift needle bar frame 5according to the requirements.
Tighten screw 3securely and slightly tighten screw 2.
Using screw 1, pull the guide stud behind it against the eye of the needle bar frame 5
and tighten it.
Loosen screw 2and turn the balance wheel a few times (this helps to avoid the oc-
curence of any tension).
Tighten screw 2.
Tighten screw 4, making sure that the slotted guide is parallel to the needle bar.
4
5
0,8 mm
6
Adjustment
8
1
3
4
13.05.02 Preliminary adjustment of the needle height
Requirement
With the needle bar at TDC (pin in hole 1) the needle point must be positioned 11 mm
above the needle plate.
Bring the needle bar 1to TDC.
Adjust needle bar 1(screw 2) according to the requirement.
Fig. 13 - 03
1
2
11 mm
Adjustment
9
Set the stitch length adjusting lever 1all the way down.
Turn bushing 2(screw 3) so that marking 4points down and the edge of the milled sur-
face is at an angle of approx. 45 ° to the front of the machine (readjustment see chap.
13.05.36Top feed synchronous position).
Insert a suitable pin or Allen key into the hole 5of the clamping ring 6and hold the shaft
7with it.
Turn shaft 7(screw 8) according to the requirement.
Fig. 13 - 04
5 6
8
7
45°
2
3
4
1
13.05.03 Zeroing the bottom feed (on machines with closed gearcase)
Requirement
With the stitch length set at "0", the feed dog must not move when the balance wheel is
turned.
Adjustment
10
13.05.04 Zeroing the bottom feed (on machines with open gearcase)
Requirement
With the stitch length set at "0", the feed dog must not move when the balance wheel is
turned.
Set the stitch length adjusting lever 1all the way down.
Set stitch length at "0".
Turn eccentric bush 2(screw 3) so that the marking faces downward and the surface of
the eccentric bush 2is at an angle of 45° to the front edge of the machine.
(readjustment see chap. 13.05.36Top feed synchronous position).
While turning the balance wheel continuously twist crank 4(screw 5) according to the
requirement.
Fig. 13 - 05
45
45°
2
3
4
1
This manual suits for next models
1
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