Pfaff 2481-980/30 PLUSLINE Guide

296-12-19 273/002
Adjustment manual in English 05.16
This instruction manual applies to machines
from the serial number 2809 573 and
software version 0307/010 onwards.
ADJUSTMENT MANUAL
2481
-3/01-980/30

Reprinting, reproduction and/or translation of PFAFF instruction
manuals (including parts thereof) is only permitted with our prior
agreement and citation of the source.
PFAFF Industriesysteme
und Maschinen GmbH
Hans-Geiger-Str. 12 - IG Nord
D-67661 Kaiserslautern

Table of Contents
Contents ..................................................................................Page
15 Adjustment ........................................................................................................................... 5
15.01 Notes on adjustment ............................................................................................................. 5
15.02 Tools, gauges and other accessories .................................................................................... 5
15.03 Abbreviations ......................................................................................................................... 5
15.04 Explanation of symbols.......................................................................................................... 5
15.05 Checking and adjustment aid................................................................................................. 6
15.06 Adjusting basic machine ........................................................................................................ 7
15.06.01 Machine drive home position ................................................................................................ 7
15.06.02 Pre-calibrating the needle height ........................................................................................... 8
15.06.03 Bottom transporter zero position........................................................................................... 9
15.06.04 Needle transport zero position............................................................................................. 10
15.06.05 Bottom transporter sliding movement................................................................................. 11
15.06.06 Needle transport sliding motion........................................................................................... 12
15.06.07 Bottom transporter lifting movement .................................................................................. 13
15.06.08 Bottom transporter height / position in stitch platen cutout ................................................ 14
15.06.09 Needle in needle hole centre............................................................................................... 15
15.06.10 Hook shaft bearing and spur gear clearance........................................................................ 16
15.06.11 Hook lubrication .................................................................................................................. 17
15.06.12 Needle bar rise, hook-to-needle clearance, needle height and bobbin case position finger 18
15.06.13 Thread check spring and slack thread regulator .................................................................. 20
15.06.14 Passage under sewing foot ................................................................................................. 21
15.06.15 Adjusting the feed regulator zero position........................................................................... 22
15.06.16 Stitch length adjustment forwards and backwards ............................................................. 23
15.06.17 Bobbin winder...................................................................................................................... 24
15.06.18 Mechanical stitch length limitation ...................................................................................... 25
15.06.19 Sewing foot pressure .......................................................................................................... 26
15.07 Adjusting thread trimmer -900/24........................................................................................ 27
15.07.01 Pre-calibrating solenoid setting / control cam ...................................................................... 27
15.07.02 Aligning thread catcher laterally........................................................................................... 28
15.07.03 Knife position ....................................................................................................................... 29
15.07.04 Front turning point of thread catcher ................................................................................... 30
15.07.05 Manual cutting control ......................................................................................................... 31
15.07.06 Needle thread tension release............................................................................................. 32
15.07.07 Re-calibrating control cam ................................................................................................... 33
15.08 Aligning transmitted light transmitter .................................................................................. 34
15.09 Adjusting transmitted light sensors ..................................................................................... 35

Table of Contents
Contents ..................................................................................Page
15.10 Functional check of bobbin thread monitor ......................................................................... 36
15.11 Adjusting electric edge guide .............................................................................................. 37
15.12 Parameter settings .............................................................................................................. 38
15.12.01 Overview of parameter functions ........................................................................................ 38
15.12.02 Example of a parameter entry ............................................................................................. 39
15.12.03 Selecting user level.............................................................................................................. 40
15.12.04 List of parameters................................................................................................................ 41
15.13 Error messages and description .......................................................................................... 47
15.14 Sewing motor errors............................................................................................................ 48
15.15 Service menu....................................................................................................................... 49
15.16 Internet update of machine software .................................................................................. 50
16 Circuit Diagrams ................................................................................................................ 51
16.01 Block diagram of PFAFF 2481 with control unit P322 ED.................................................... 51
16.02 Circuit diagrams ................................................................................................................... 52
16.03 Plug connections ................................................................................................................. 57

Adjustment
5
15 Adjustment
Observe and comply with all instructions in the operating manual’s chapter 1
Safety! In particular make sure that all safety covers are installed again correct-
ly after making adjustments, see chapter 1.06 Operating manual hazard infor-
mation!
Unless otherwise stated, the machine must be disconnected from the power
supply before all adjustment work!
Risk of injury due to accidental machine start-up!
No screw clamp may be fastened to the needle bar with the
PFAFF 2481-980/30!
This may damage the special needle bar coating.
15.01 Notes on adjustment
All adjustments in this manual are based on a fully assembled machine and may only be car-
ried out by technical staff trained for this purpose. Machine covers, which have to be re-
moved 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 that have to be completely adjusted. Both the preceding and following chapters must
be observed if only specific individual work steps are carried out. Screws and nuts indicated
in brackets ( ) are fastenings for machine parts, which must be loosened before any adjust-
ment and tightened again afterwards.
15.02 Tools, gauges and other accessories
O1set of screwdrivers with knife widths of 2to 10 mm
O1set of wrenches with jaw widths from 7to 14 mm
O1set of Allen keys of 1.5to 6mm
O1feed dog setting gauge (order no. 61-111 639-71)
O1setting gauge (order no. 61-111 639-73)
O1adjustment pin (5mm diameter), order no. 13-033 346-05
O1metal ruler (order no. 08-880 218-00)
OThread and testing material
15.03 Abbreviations
t.d.c. = top dead centre
b.d.c. = bottom dead centre
15.04 Explanation of symbols
Activities to be performed or important information in this adjustment manual are empha-
sised by symbols. The symbols used have the following meaning:
Note, information
Maintenance, repairs, adjustment, service work
(only to be carried out by technical staff)

Adjustment
6
15.05 Checking and adjustment aid
The adjustment pin 1(order no. 13-033 346-05) and the adjustment gauge 3
(order no. 61-111 639-73) if necessary can be used to fix the required positions
during the adjustment.
Needle bar positioned 1.8 mm after b.d.c.
OTurn the handwheel until the needle bar is approximately in the required position.
OPush the adjustment pin 1into the hole.
OMove the handwheel gently back and forwards until the adjustment pin 1engages in the
crank 2.
Needle bar positioned 0.6 mm after b.d.c.
OMove the needle bar approximately into the required position.
OFit the adjustment gauge 3to the studs 4and 5ensuring the right side (for a 30 mm or
36 mm needle bar stroke).
Fig. 15 - 01
1
2
4
5
3

Adjustment
7
15.06 Adjusting basic machine
15.06.01 Machine drive home position
This setting is only required if the toothed belt 2has been dismantled.
Rule
The markings 3 and 4 should be aligned if the needle bar is positioned 0.6 mm after b.d.c.
Fig. 15 - 02
OMove the needle bar to 0.6mm after b.d.c.
OTurn the toothed belt wheel 1according to the rule and slide on the toothed belt 2.
Make sure that the shaft flange, shock absorber and motor flange are in the
right position when installing the motor!
The second toothed belt wheel screw 1is a balance cup screw
3
41
2

Adjustment
8
15.06.02 Pre-calibrating the needle height
Rule
The marking on the needle bar 1 should be flush with the lower edge of the needle bar
frame 3 when the needle bar is positioned 1.8 mm after b.d.c.
Fig. 15 - 03
OMove the needle bar to 1.8mm after b.d.c. and fix with the adjustment pin, see chapter
15.05 Checking and adjustment aid.
OAdjust the needle bar 1( screw 2) without twisting according to the rule.
2
1
3

Adjustment
9
15.06.03 Bottom transporter zero position
Rule
At stitch length regulation “0”
1. The marking on the toothed segment 1 should be in the centre of the shaft of the gear
wheel 3,
2. The cranks 4 and 6 should be aligned and the bottom transporter should not move
when turning the handwheel.
Fig. 15 - 04
OSwitch the machine on.
OSet the stitch length to “0” using the control panel and turn the handwheel until the feed
regulator motor responds.
OMake sure that parameter 834 is set to “0”, see chapter 15.11 Parameter settings.
OAdjust the toothed segment 1( screws 2) without the gear wheel 3according to rule 1.
OTurn the crank 4( screws 5) according to rule 2.
OSwitch the machine off.
6
5
4
1
2
2
3
0.0

Adjustment
10
15.06.04 Needle transport zero position
Rule
The needle bar should not move when turning the handwheel with stitch length regulation
“0”.
OSwitch the machine on.
OSet the stitch length to “0” using the control panel and turn the handwheel until the feed
regulator motor responds.
OMake sure that parameter 834 is set to “0”, see chapter 15.11 Parameter settings.
OTurn the crank 1( screw 2) according to the rule.
OSwitch the machine off.
Fig. 15 - 05
2
1
0.0