Trimming And Clamping Device For The Underthreads - Duerkopp Adler 745-26 Service Instructions Manual

15.16 Trimming and Clamping Device for the Underthreads

1 2
100
Function
–
After the seam end the underthreads are pulled through the thread
grooves of the needle plate into the opened underthread shears 1
and underthread clamp 2 during the drawing forward of the thread.
–
The underthread clamp 2 is under the needle plate.
It opens pneumatically.
–
The underthreads are pulled between the needle plate wall and the
opened spring clamping plates 5.
–
The spring clamping plates 5 close.
–
The underthread shears 1 cuts the underthreads off.
–
During each work cycle the underthread shears 1 are cleaned by a
jet of air.
This prevents a clamping in of lint and thread ends.
Setting
The upper edge of the underthread shears 1 must lie at the same
height as the top of the needle plate.
An underthread shears lying too high can cause damage to the
material.
The underthreads are not cut off if the underthread shears lie too low.
The limit plates 4 mounted on the cylinder 3 determine the opening
width of the spring clamping plates.
With the spring clamping plates 5 pneumatically opened both hook
points must move past at a safe clearance.
3 4 5