Thread Trimmer; Control Cam For The Knife Motion; Control Cam Position - Duerkopp Adler 281 Service Instructions Manual

7.

Thread trimmer

7.1 Control cam for the knife motion

7.1.1

Control cam position

3
The control cam 3 determines the stroke and the timing of the knife
motion. The timing thus coincides with the motion of the needle.
The thread trimmer is switched on electromagnetically.
2 1
Caution: Risk of injury!
Turn off the main switch!
Check and set the control cam only with the sewing machine
switched off.
Standard checking
With the sewing machine arrested at locking position "4", the roller 1
must engage in the indentation 4 of the control cam 3 when manually
pressed downwards.
Correction
–
Arrest the sewing machine at locking position "4".
–
Loosen the fastening screws 2 of the control cam 3.
–
Turn the control cam of the lower shaft.
The roller 1 must engage in the indentation 4 of the control cam 3
when manually pressed downwards.
–
Tighten the fastening screws 2 again.
2
4
1
3
GB
25