Triggering The Needle Thread Scissors - Pfaff 3117 Instruction Manual

14 Triggering the needle thread scissor
.20.05
Requirement
The needle thread scissor must not cut the thread before tension 2 has opened
(cf. section 14.14 Needle thread tension).
Fig. 14 - 47
Loosen grub screw 1.
Turn the eccentric 2 until there is a clearance of 1.5 mm between the lifting piece 3 and
the roller 4.
Tighten grub screw 1.
Loosen screw 5 and shift catch 6 in height so that there is a clearance of 0.5 mm
between the springborn pawl 7 and the top surface of catch 6.
Tighten screw 5.
2
1
4
3
5
6
7
Adjustment
14 - 49