Pfaff 421E1 - Hook-To-Needle Clearance, Needle Rise, Needle Height and Needle Guard

Adjustment
13.04.07 Hook-to-needle clearance, needle rise, needle height and needle guard
Requirements
With the needle at 1.8 after BDC and with the stitch length at " 0.8 "
1. the hook point must point to the middle of the needle and be 0.05 to 0.1 mm from the
needle,
2. the top edge of the needle eye must be 0.8 to 1.0 mm beneath the hook point and
3. the needle guard 4 must lightly touch the needle.
● Turn the machine on.
● Set the stitch length to " 0.8 " and sew four to five stitches (without trimming).
● Turn the machine off.
● Loosen screws 1, 2 and 3.
● Move the hook bearing in accordance with requirement 1 taking care to ensure that the
needle is not pressed by the needle guard 4.
● Tighten screws 1 and 2 while positioning the second screw 2 on the recess of the shaft
in the direction of rotation.
Fig. 13 - 06
6
1
1
5
2
3
4
7
8
0.8 - 1 mm
13 - 9