Adjustment
11 - 54
11.07.08 Control cam for cutter (adjustment without gauge)
Requirements
1. The cutting movement must begin when the needle bar is positioned 0.6 mm past TDC.
2. There must be a distance of 9 mm between control cams 2 and 4.
● Loosen screws 1.
● Bring needle bar to BDC and operate the engaging lever by hand.
● Bring the needle bar to 0.6 mm past TDC (use adjustment gauge and clamp).
● Turn control cam 2 until the cam is resting on the cylinder of control lever 3.
● Making sure that control cam 2 is at a distance of 9 mm to sliding cam 4, tighten one of
the screws 1.
● Remove clamp, make second screw 1 accessible and tighten it.
When using elastic thread it may be necessary to adjust the control cams for the
bobbin opener and cutter a little "later".
For very elastic threads a thread tension control device (subclass 906/10) for
automatic tension release is available.
4
1
2
3
Fig. 11 - 50
9 mm
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