Table Of Contents - Pfaff 939 U Adjustment Manual

Contents ..................................................................................Page
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Adjustment ........................................................................................................................... 5
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.01 Tools, gauges and other accessories for adjusting ................................................................ 5
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.02 Abbreviations ......................................................................................................................... 5
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.03 Explanation of the symbols .................................................................................................... 5
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.04 Check and adjustment aid ...................................................................................................... 6
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.05 Adjusting the basic machine .................................................................................................. 7
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.05.01 Balancing weight .................................................................................................................... 7
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.05.02 Centering the needle in the needle hole (in sewing direction) ............................................... 8
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.05.03 Parallel guiding of the needle bar ........................................................................................... 9
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.05.04 Locking lever ........................................................................................................................ 10
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.05.05 Zero stitch and zigzag stitch scale ........................................................................................ 11
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.05.06 Centering the needle in the needle hole (crosswise to sewing direction) ........................... 12
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.05.07 Zigzag stitch width ............................................................................................................... 13
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.05.08 Multi-stitch movement (only on the PFAFF 939U) ............................................................... 14
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.05.09 Zigzag stitch movement (only on the PFAFF 3704-2/..) ........................................................ 15
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.05.10 Needle penetration symmetry - left, centre and right (only on the PFAFF 3704-2/..) ........... 16
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.05.11 Zigzag movement (only on the 939U) .................................................................................. 17
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.05.12 Target positioning sensor (only on the 939U) ...................................................................... 18
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.05.13 Needle position adjustment lever ........................................................................................ 19
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.05.14 Adjustment wheels for differential feed (only on the PFAFF 939U) ..................................... 20
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.05.15 Zeroing the differentiatio (only on the PFAFF 939 U) ........................................................... 21
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.05.16 Differential feed synchronisation (only on the PFAFF 3704-2/..) ........................................... 22
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.05.17 Position of the stitch length adjustment wheel (on the PFAFF 939 U) ................................ 23
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.05.18 Position of the stitch length adjustment wheel (on the PFAFF 3704-2/..) ............................ 24
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.05.19 Zeroing the main feed (rear feed dog) on the PFAFF 939 U................................................. 25
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.05.20 Zeroing the main feed (rear feed dog) on the PFAFF 3704-2/.. ............................................ 26
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.05.21 Zeroing the differential feed (front feed dog) on the PFAFF 939 U ...................................... 27
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.05.22 Zeroing the differential feed (front feed dog) on the PFAFF 3704-2/.. .................................. 28
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.05.23 Torsion spring of the reverse feed lever (on the PFAFF 939 U) ............................................ 29
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.05.24 Torsion spring of the reverse feed lever (on the PFAFF 3704-2/..) ....................................... 30
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.05.25 Torsion spring of the differentiation regulating shaft (on the PFAFF 939 U) ......................... 31
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.05.26 Torsion spring of the differentiation regulating shaft (on the PFAFF 3704-2/..) .................... 32
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.05.27 Feeding motion of the main and differential feeds .............................................................. 33
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.05.28 Lifting stroke of the main and differential feed dogs ............................................................ 34
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.05.29 Height of the main and differential feed dogs ...................................................................... 35
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.05.30 Drive belt in the gearbox housing ........................................................................................ 36
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.05.31 Hook bearing bracket .......................................................................................................... 37
Index