Pfaff 1295 Instruction Manual page 45

Set the hook point at the needle centre, making sure that the needle is not deflected by
needle guard 8.
Making sure that bevel gear 6 is not too close, but the hook has not too much play,
tighten screws 2.
Move fixing collar 7 up against bevel gear 6 and tighten screws 3.
Adjust the needle height according to Requirement 2 (see also Chapter 11.04.04,
Needle height preliminary adjustment).
position needle guard 8 according to Requirement 3.
After changing the needle clearance be sure to readjust the connecting linkage
of the thread trimmer mechanism (see also Chapter 11.05.6, Connecting
linkage).
Adjustment
11 - 10