Trimmer Test - Pfaff 3801-3/07 Instruction Manual

Adjustment
13

Trimmer test

.06.06
● Lay material under presser foot and sew a few stitches.
● Remove cover plate 1.
● Set needle position according to chapter 13.06.04 Thread catcher guard.
● Operate cutting cylinder manually to check requirements 1 and 2.
● If necessary, adjust thread catcher 2 accordingly.
● Screw on cover plate 1.
● Operate cutting cylinder again and check requirement 3.
● If necessary, turn screw 4 carefully according to requirement 3.
13 - 41
Requirement
1. The point of the thread catcher 2 must securely take hold of the looper thread and the
back part of the needle thread loop.
2. The threads must not be damaged when the cover plate 1 is removed.
3. When the cover plate 1 is mounted, the thread catcher 2 must enter between the
knife 3 and the thread clamp spring 5; in the process, the threads must be perfectly
cut and trapped.
2
Fig. 13 - 38
1
3
1
5
4