Setting The Lower Blade Bracket And The Seam Width Adjusting Knob - Pfaff Coverlock 4872 Service Manual

24. Setting the lower blade bracket and the seam width adjusting knob

Requirement:
When the seam width adjusting knob 25 is set at the lowest number (fig. 43), the lower blade must have a
clearance of 0.2 - 0.3 mm to the needle plate. The knob 26 of the upper blade must also have a clearance
of 0.1 - 0.2 mm to the holder 27 (fig. 44).
Check:
G Set the seam width adjusting knob 25 to the narrowest seam width.
G Carry out a visual check (fig. 43).
Setting:
G Set the seam width adjusting knob 25 to the narrowest seam width.
G Loosen the fastening screws 28.
G Push the complete seam width adjusting knob 25 so that a
clearance of 0.2 - 0.3 mm to the needle plate is set.
G Tighten the fastening screws 28.
G Loosen the fastening screw 29 (fig. 44).
G Push the holder 27 toward the front until the holder 27 has a
clearance of 0.1 - 0.2 mm to the knob 26 of the upper blade.
G Tighten the fastening screw 29.
Test:
G As described under "Check".
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