Table of Contents
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Table of Contents
1
1.1
1.2
1.3
1.4
2
2.1
2.2
3
3.1
3.2
3.3
3.3.1 Gage set ..................................................................................... 12
3.3.2 Handwheel positions .................................................................. 13
4
5
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
7
7.1
7.2
7.3
7.4
8
9
9.1
9.2
10
10.1
10.2
10.3
11
11.1
11.2
11.3
11.4
11.5
Service Instructions 171/173 - 00.0 - 01/2020
About these instructions ........................................................... 3
For whom are these instructions intended?.................................. 3
Representation conventions - symbols and characters ............... 3
Other documents .......................................................................... 4
Liability.......................................................................................... 5
Safety ........................................................................................... 7
Basic safety instructions ............................................................... 7
Signal words and symbols used in warnings ................................ 8
Working basis ........................................................................... 11
Order of the adjustments ............................................................ 11
Laying the cables........................................................................ 11
Gage set and handwheel positions ............................................ 12
Placing the toothed belt at the bottom ................................... 16
Position of needle and hook.................................................... 17
bearing on the left ....................................................................... 17
Adjusting the hook drive housing................................................ 19
Adjusting the needle evasive movement (ellipsis width)............. 20
Adjusting the symmetry of the hook ........................................... 23
Adjusting the hook in the hook carrier ........................................ 24
Adjusting looping stroke and needle bar height.......................... 25
Adjusting the needle guard ......................................................... 27
Feed dog.................................................................................... 28
Adjusting the thrust movement of the feed dog .......................... 28
Adjusting the stroke movement of the feed dog ......................... 30
Adjusting the retention spring on the hook ................................. 31
Adjusting the thread take-up disk ............................................... 32
Adjusting the thread trimmer .................................................. 34
Adjusting the sewing foot stroke ............................................ 40
Adjusting the sewing foot stroke for presser feet........................ 40
Adjusting the sewing foot stroke for hinged lever feet ................ 43
Stitch lengths ............................................................................ 45
Adjusting normal stitch lengths ................................................... 45
Adjusting stitch condensing for the bottom feed ......................... 46
Adjusting stitch condensing for the puller ................................... 47
Puller.......................................................................................... 48
Adjusting the synchronization of bottom feed and puller ............ 48
Adjusting the distance between carrier roller and needle ........... 49
Adjusting the lift stroke of the carrier roller ................................. 50
Adjusting the carrier roller pressure............................................ 51
Fabric deflector ........................................................................... 52
1
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