Pfaff select 1520, Руководство по обслуживанию

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6. Adjustment of presser bar height on Pfaff 1530-1540
Requirement:
With the presser bar lifter raised, there must be a clearance of 8 mm between the needle plate and the
bottom of the zigzag foot.
Check:
z
Raise the presser bar lifter.
z
Fit the zigzag foot.
z
Lower the feed dog.
z
Fully raise the presser bar lifter and hold it there firmly.
z
At the same time, insert presser foot gauge No. 63-114690-39 from the rear under the zigzag foot and
into the cutouts of the needle plate (fig. 9).
z
Lower the presser bar lifter to its normal position again.
The zigzag foot must rest parallel and without play on the presser foot gauge.
However, the presser foot gauge must not lift the zigzag foot, and the needle thread tension release 23
must be without play (fig. 10).
Adjustment:
z
Loosen the three screws 21, 24 and 25.
z
With the presser bar lifter raised turn the zigzag foot until it is parallel to the sides of the presser foot
gauge.
z
Use a screwdriver to press presser bar guide 22 firmly downward.
z
At the same time, firmly tighten screw 21.
Cross-check:
z
Push the presser bar lifter further upward and release it again.
The zigzag foot must rest parallel and without play on the presser foot gauge.
Needle thread tension release 23 must be without play. The presser bar lifter must be in raised position.
Note:
Tighten the two screws 24 and 25 later, when the top feed foot height is adjusted.