Pfaff 487 Guide
ADJUSTMENT MANUAL
296-12-18 646/002
Justieranleitung engl. 06.09
This Adjustment Manual is valid for machines
from the following serial numbers onwards:
# 2 756 862
487
The reprinting, copying or translation of PFAFF Service 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 for adjusting ............................................................... 4
1.03 Abbreviations ......................................................................................................................... 4
1.04 Explanation of the symbols.................................................................................................... 4
1.05 Checking and adjusting aid .................................................................................................... 5
1.06 Adjusting the basic machine .................................................................................................. 6
1.06.01 Balancing weight.................................................................................................................... 6
1.06.02 Needle in needle-hole centre................................................................................................. 7
1.06.03 Neutral position of drop feed ( Adjustment with the gearcase closed................................... 8
1.06.04 Adjustment with the gearcase opened.................................................................................. 9
1.06.05 Actuating lever under the reverse-feed control.................................................................... 10
1.06.06 Feeding motion of drop feed................................................................................................ 11
1.06.07 Lifting motion of drop feed .................................................................................................. 12
1.06.08 Height of drop feed dog....................................................................................................... 13
1.06.09 Clearance between presser foot and needle plate ............................................................. 14
1.06.10 Top feed actuating link ......................................................................................................... 15
1.06.11 Neutral position of top feed ................................................................................................. 16
1.06.12 Feeding motion of the top feed dog .................................................................................... 18
1.06.13 Vibrating presser clearance.................................................................................................. 19
1.06.14 Top feed lifting motion ......................................................................................................... 20
1.06.15 Position of lifting presser ..................................................................................................... 21
1.06.16 Synchronizing the top feed .................................................................................................. 22
1.06.17 Stitch length alignment ........................................................................................................ 23
1.06.18 Eccentric hook shaft bearing and hook-to-needle clearance................................................ 24
1.06.19 Final adjustment of needle rise, needle height, and bobbin case position finger..................25
1.06.20 Bobbin case opener height .................................................................................................. 26
1.06.21 Adjustment of the bobbin opener........................................................................................ 27
1.06.22 Bobbin case opener motion................................................................................................. 28
1.06.23 Needle thread tension release............................................................................................. 29
1.06.24 Thread check spring and thread regulator ............................................................................ 30
1.06.25 Bobbin winder...................................................................................................................... 31
1.06.26 Knee lever resting position .................................................................................................. 32
1.06.27 Knee lever play..................................................................................................................... 33
1.06.28 Knee lever stroke limitation ................................................................................................. 34
1.06.29 Position of vibrating presser in relation to lifting presser ..................................................... 35
1.06.30 Pressure of the vibrating- and lifting pressers...................................................................... 36
1.06.31 Stitch length limitation ......................................................................................................... 37
1.07 Parameter settings (only on machines with EcoDrive and control unit P40 ED).................. 38
1.07.01 Parameter list....................................................................................................................... 38
2Circuit diagrams ................................................................................................................ 39
Adjustment
4
1 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!
On the PFAFF 487 do not use a screw clamp on the needle bar!
The special coating of the needle bar could be damaged.
1.01 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 adjustments, are not mentioned in the text.
The order of the following chapters corresponds to the most logical work sequence for ma-
chines 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 loose-
ned before adjustment and tightened again afterwards.
1.02 Tools, gauges and other accessories for adjusting
● Set of screwdrivers with blade widths from 2 to 10 mm
● Set of open-ended spanners, 7 to 14 mm across-flats
● Set of allen keys, 1.5 to 6 mm
● Metal rule, part No. 08-880 218-00
● Adjustment pin (5 mm dia.), part No. 13-030 341-05
● Adjustment gauge, part. No. 61-111 639-49
● Adjustment link, part No. 91-069 375-15
● Adjustment foot, part No. 61-111 639-20
1.03 Abbreviations
TDC = top dead center
BDC = bottom dead center
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 qualified staff only)
Adjustment
5
1.05 Checking and adjusting aid
By blocking holes 1 to 6 with a pin it is possible to accurately fix the required
needle bar positions.
●Turn the balance wheel until the needle bar is roughly in the required position.
●Insert the blocking pin in the required hole and press against it.
●Turn the balance wheel slightly back and forth so that the pin enters the cutout in the
bearing plate behind and thus blocks the machine.
Hole 1 = 0.6 mm past top dead centre of the needle bar (0.6 past t.d.c.)
Hole 3 = 0.6 mm past bottom dead centre of the needle bar (0.6 past b.d.c.)
Hole 4 = 1.8 mm past bottom dead centre of the needle bar (needle rise position)
Hole 5 = top dead centre of the needle bar (t.d.c.)
Hole 6 = 4 mm past bottom dead centre of the needle bar (4 past b.d.c.)
Fig. 1 - 01
Adjustment
6
1.06 Adjusting the basic machine
1.06.01 Balancing weight
Requirement
With the needle bar at b.d.c. the underside of the needle bar must be at a distance of
approx. 16.5 mm from the needle plate.
●Re-position needle bar 1(screws 2) according to Requirement.
Fig. 1 - 02
1
2
16,5 mm
Adjustment
7
● Set the needle immediately above the needle hole.
● Loosen screws 1, 2 and 3.
● Reposition needle bar frame 4according to the Requirement both crosswise and
lengthwise of the feeding direction.
● Tighten screw 3firmly and screw 2 just a little.
● Turn screw 1to take up the guide pin behind it against the eye of the needle bar frame
and tighten it.
● Take out the needle.
● Loosen screw 2, turn the balance wheel a few turns (to remove any binding) and tighten
screw 2firmly.
1.06.02 Needle in needle-hole centre
Requirement
The needle must enter exactly in the centre of the needle hole.
Fig. 1 - 03
1
4
2
3
Adjustment
8
● Set feed regulator lever 1in its lowest position.
● Turn bush 2(screw 3) so that mark 4is facing downwards and the edge of the milled
surface is at an angle of approx. 45° to the front side of the machine.
● (For the final adjustment, see Chapter 1.0.06.16 "Top feed synchronization".)
● Insert a suitable pin or allen key in hole 5of tensioning ring 6and hold shaft 7with it
firmly.
● Turn shaft 7(screw 8) according to Requirement.
Fig. 1 - 04
56
8
7
45°
2
3
4
1
1.06.03 Neutral position of drop feed ( Adjustment with the gearcase closed
Requirement
At stitch length setting "O" the drop feed must not make any feeding movement when the
balance wheel is turned.
Adjustment
9
● Set feed regulator lever 1in its lowest position.
● Turn bush 2(screw 3) so that mark 4is facing downwards and the edge of the milled
surface is at an angle of approx. 45° to the front side of the machine.
(For the final adjustment, see Chapter 1.0.06.16 "Top feed synchronization".)
● Turn crank 5(screw 6) according to Requirement.
1.06.04 Adjustment with the gearcase opened
Fig. 1 - 05
56
45°
2
3
4
1
Adjustment
10
1.06.05 Actuating lever under the reverse-feed control
Requirement
At the longest stitch length setting, reverse-feed control lever 3must have a slight play
(approx. 0.3 mm) when pressed lightly.
● Loosen screws 1and 2.
● Make sure that reverse-feed control lever 3is resting on stop 4, move actuating lever 5
lightly against the reverse-feed control and tighten screw 1again.
Leave screw 2loose until the top-feed neutral position is adjusted
(Chapter 1.06.11).
Fig. 1 - 06
1
2
3
5
4
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