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f) Checking width of bar tack and bead
Theoretical sizes: bar tack width =4,27 mm
bead width
= 1.9 1 mm
cut gap
=0.45
mm
Correcting cut gap:
Cut gap and bead width cannot be adjusted independently.
-
Buttonhole knob to 1
-
Dismantle knob and scale plate of buttonhole device
- Loosen locknut 1 59 on zig-zag changeover lever
-
Set cut gap and bead width by turning eccentric bolt 1 60
-
Tighten locknut 159.
After adjustment check the position of the stitch width knob (marking must be at
0).
Loosen screw if neccessary and move knob to correct position.
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