581
583
ADJUSTMENT MANUAL
This Adjustment Manual is valid for machines
from the following serial numbers onwards:
# 2 771 790
296-12-19 140/002
Justieranleitung engl. 04.11
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
source.
PFAFF Industriesysteme
und Maschinen AG
Hans-Geiger-Str. 12 - IG Nord
D-67661 Kaiserslautern
Index
Contents ..................................................................................Page
1 Adjustment ........................................................................................................................... 4
1.01 Notes on adjustment ............................................................................................................. 4
1.02 Tools, gauges and other accessories .................................................................................... 4
1.03 Abbreviations ......................................................................................................................... 4
1.04 Explanation of the symbols .................................................................................................... 4
1.05 Control and adjustment aids .................................................................................................. 5
1.06 Adjusting the basic machine .................................................................................................. 6
1.06.01 Preliminary adjustment of the needle height ......................................................................... 6
1.06.02 Neutral position of the bottom feed dog ................................................................................ 7
1.06.03 Zeroing the needle feed motion (not on the PFAFF 583) ....................................................... 9
1.06.04 Bottom transporter stroke movement ................................................................................. 10
1.06.05 Bottom transporter height.................................................................................................... 11
1.06.06 Needle in stitch hole (in PFAFF 581) ....................................................................................12
1.06.07 Needle in stitch hole (in PFAFF 583) ....................................................................................13
1.06.08 Bottom transporter sliding movement ................................................................................. 14
1.06.09 Timing the needle feed motion (not on the PFAFF 583) ...................................................... 15
1.06.10 Eccentric hook shaft bearing and hook-to-needle clearance ................................................ 16
1.06.11 Needle rise, hook-to-needle clearance, needle height and bobbin case position fi nger ............. 17
1.06.12 Clearance between presser foot and needle plate .............................................................. 18
1.06.13 Correction of forward feed offset (only in PFAFF 581) ......................................................... 19
1.06.14 Stitch length adjustment ...................................................................................................... 20
1.06.15 Limiting the stitch length ..................................................................................................... 21
1.06.16 Tension release mechanism ................................................................................................. 22
1.06.17 Thread check spring ............................................................................................................. 23
1.06.18 Bobin winder ........................................................................................................................ 24
1.06.19 Presser foot pressure .......................................................................................................... 25
1.07 Adjusting the thread trimming device -900/24 ..................................................................... 26
1.07.01 Home position of the roller lever ......................................................................................... 26
1.07.02 Control cam ......................................................................................................................... 27
1.07.03 Front return position of the thread catcher .......................................................................... 28
1.07.04 Knife pressure and cut test .................................................................................................. 29
1.07.05 Top thread tension release (in machines with -900/..) .......................................................... 30
2 Basic position of the machine drive unit ........................................................................31
2.01 On machines with PicoDrive and control unit P41 PD2 ....................................................... 31
2.02 With drive system MD-4-58-220-CE .................................................................................... 32
2.03 Reseting the drive system MD-4-58-220-CE ....................................................................... 32
3 Block diagram .................................................................................................................... 33
3.01 PFAFF 581 + 583 with MD-4-58-220-CE .............................................................................33
3.02 PFAFF 581 + 583 with PicoDrive and control unit P41 PD2 ............................................... 34
Adjustment
1 Adjustment
1.01 Notes on 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 refi tted properly after adjustment, see Chapter 1.06 Danger warnings of the instruction
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!
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
adjustments, 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 specifi c 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.
On the PFAFF 581 and 583 no c-clamps may be attached to the needle bar
as this would damage the special coating on the needle bar.
1.02 Tools, gauges and other accessories
● 1 set of screwdrivers with blade widths from 2 to 10 mm
● 1 set of wrenches with jaw widths from 7 to 22 mm
● 1 set of Allan keys from 1.5 to 6 mm
● 1 Absteckstift 5,0 mm (Best.-Nr. 13-030 341-05)
● 1 Adjustment gauge, part No. (Best.-Nr. 61-111 642-19)
● 1 metal ruler (part no. 08-880 218-00)
1.03 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
1.04 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 qualifi ed staff only)
4
Adjustment
1.05 Control and adjustment aids
By marking the holes 1 - 7 with the adjustment pin (ø 5 mm), the desired nee-
dle bar positions can be fi xed exactly.
3
7
1
6
4
5
Fig. 1 - 01
● Turn the balance wheel until the needle bar is approximately in the desired position.
● Insert the adjustment pin into the appropriate hole and apply pressure.
● Turn the balance wheel slightly backwards and forwards, until the pin locks into the
rear crank recess, in this way blocking the machine.
Adjustment hole 1 = 0.6 mm past top dead centre of the needle bar (0.6 past t.d.c.)
Adjustment hole 3 = 0.6 mm past bottom dead centre of the needle bar (0.6 past b.d.c.)
Adjustment hole 4 = 1.8 mm past bottom dead centre of the needle bar (1.8 past b.d.c.)
Adjustment hole 5 = top dead centre of the needle bar (t.d.c.)
Adjustment hole 6 = 4.0 mm past bottom dead centre of the needle bar (4.0 past b.d.c.)
Adjustment hole 7 = 1,5 mm before bottom dead centre of the needle bar ( 1,5 before u.T. )
5
Adjustment
1.06 Adjusting the basic machine
1
.06.01 Preliminary adjustment of the needle height
Requirement
With the needle bar at b.d.c. the distance between bottom edge of the needle bar and
the needle plate must be16.5 mm.
3
7
6
4
1
5
Fig. 1 - 02
● Adjust needle bar 1 (screws 2) according to the requirement.
16,5 mm
6
Adjustment
1.06.02 Neutral position of the bottom feed dog
Requirement
With the stitch length set at "0" there should be no feeding motion of the bottom feed dog
when the balance wheel is turned..
4
5
3
1
2
45°
Fig. 1 - 03
Zeroing procedure with the gearbox closed
● Turn excenter sleeve 1 (screw 2) until largest excentricity is in lower area (see arrow) and
the edge of the milled surface is at an angle of approx. 45° to the machine's base plate.
● Insert an Allen key in an opening for clamping ring 3 to hold shaft 4.
● Turn shaft 4 (screw 5) with the Allen key with a continuous movement of the handwheel
in accordance with the rule.
7
Adjustment
Zeroing procedure with the gearbox open
5
6
1
2
45°
Fig. 1 - 03a
● Turn excenter sleeve 1 (screw 2) until largest excentricity is in lower area (see arrow) and
the edge of the milled surface is at an angle of approx. 45° to the machine's base plate.
● Turn crank 5 (screw 6) according to the rule.
8
Adjustment
1.06.03 Zeroing the needle feed motion (not on the PFAFF 583)
Requirement
With the stitch length control set at “0” the needle bar should make no feed motion when
the handwheel is turned.
1
Fig. 1 - 03a
● Adjust needle feed regulating crank 1 (screw 2) according to the requirement
2
9
Adjustment
.06.04 Bottom transporter stroke movement
1
Requirement
With the stitch length set at "0"
1. the feed dog should be at t.d.c. when the needle bar is at a position 1.5 mm before
b.d.c (cylindrical pin in hole "7"; for PFAFF 581) or 0.6 mm past t.d.c (cylindrical pin in
hole "1"; for PFAFF 583).
2. In this position, the notch in feed lifting eccentric 1 should be positioned perpendicularly
below the center of the shaft.
1
2
Fig. 1 - 04
● Turn feed lifting eccentric 1 (screws 2) according to the requirement.
2
10
Adjustment
1.06.05 Bottom transporter height
Requirement
With the stitch length set at "0" and the needle bar at a position
1.5 mm before b.d.c (cylindrical pin in hole "7", for PFAFF 581) and 0.6 past t.d.c. (cylindri-
cal pin in hole "1"; for PFAFF 583)
1. the feed dog must be positioned in the middle of the needle plate slots when looked
atfrom the side as well as in feeding direction.
2. the feed dog must be at its top point of reversal and must contact the gauge through-
out its entire length.
61-111 642-19
3
1
5
1
4
6
2
=
Fig. 1 - 05
● Move feed bar 1 (screw 2) according to requirement 1.
● Turn eccentric 3 (screw 4) and eccentric 5 (screw 6) according to requirement 2.
=
11
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