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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 Adjusting the basic machine .................................................................................................. 5

1.05.01 Basic position of the balance wheel (adjustment aid) ............................................................ 5

1.05.02 Balance weight ...................................................................................................................... 6

1.05.03 Zero position of the unison feed ........................................................................................... 7

1.05.04 Feeding motion of the unison feed ....................................................................................... 8

1.05.05 Lifting motion of the bottom feed dog ...................................................................................9

1.05.06 Height of the bottom feed dog ............................................................................................ 11

1.05.07 Feeding stroke difference .................................................................................................... 12

1.05.08 Preliminary adjustment of the needle height ....................................................................... 13

1.05.09 Needle rise, hook clearance, needle height and needle guard ............................................ 14

1.05.10 Top feed stroke .................................................................................................................... 16

1.05.11 Top-feed lifting motion ......................................................................................................... 17

1.05.12 Adjusting the potentiometer for speed reduction ................................................................ 18

1.05.12.01 On machines with drive P74 ED-L ........................................................................................ 19

1.05.12.02 On machines with drive PF 321 ........................................................................................... 19

1.05.13 Bobbin case opener stroke ................................................................................................. 19

1.05.14 Adjusting the shortened trim stitch......................................................................................20

1.05.15 Bobbin winder ...................................................................................................................... 21

1.05.16 Thread check spring and thread regulator ............................................................................ 22

1.05.17 Sewing foot pressure ........................................................................................................... 23

1.05.18 Lubrication ........................................................................................................................... 24

1.05.19 Limiting the stitch length ..................................................................................................... 25

1.05.20 Speed reduction ................................................................................................................... 26

1.05.21 Re-engaging the slip-clutch .................................................................................................. 27

1.06 Adjusting the thread trimmer -900/81 .................................................................................. 28

1.06.01 Resting position of roller lever/radial position of control cam .............................................. 28

1.06.02 Position and height of the thread catcher ............................................................................ 29

1.06.03 Knife pressure ...................................................................................................................... 30

1.06.04 Bobbin thread clamp spring ................................................................................................. 31

1.06.05 Manual cutting test .............................................................................................................. 32

Pfaff Powerline 2545 Adjustment Manual

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