Needle Plate Disengaging Lever; Stitch Length Adjustment Knob - Pfaff coverlock 4852 Owner's Manual

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Adjusting the stitch length
You can set the desired stitch length
between 0.5 mm to 4.0 mm by turning the

stitch length adjustment knob (42).

Note
For the two thread chainstitch, the setting
should be 3.0 or higher.
Removing the needle plate
Raise the presser foot and move the
needle(s) to the highest position. Remove
the presser foot and open the swivel plate.
Press down the needle plate disengaging
lever 26. The needle plate 11 is raised out of
its mount. The needle plate can be removed
to the left.
Note:
The machine should be unthreaded when
removing the needle plate.
Inserting the needle plate
Place the needle plate to the rear on the
guide pin (A) and press down at the front
until you hear it click into place.