Beisler 1220-4 - Manual (Page 51)

Chapter 6: Operation
Page 6-27
Pict. 26 Front needle protection (2)
A distance of 0.03 to 0.05 mm should exist between needle protection
and needle in the bottom change point of the needle.
1. Turn the hand wheel in turn direction until the needle stands
in its bottom change point.
2. Loosen screw (1) and push the needle protection that there
is a distance of 0.03 to 0.05 mm between needle protection
and needle.
3. Tighten screw (1) in this position.