Needle Bar Height - DURKOPP ADLER 767 Service Instructions Manual

4.2

Needle bar height

16
1
2
Caution: Danger of injury !
Switch off main switch.
Check and adjust needle bar height only when sewing machine is
switched off.
Standard checking
In looping stroke position the hook tip must be at the level of the middle
of the needle hollow groove 3.
–
Move needle in looping stroke position by handwheel.
In looping stroke position the hook tip is at the level of the middle of
the needle.
–
Check position of the hook tip to the needle hollow groove 3.
Correction
–
Take off head cover.
–
Loosen both screws 1.
–
Adjust the height of needle bar 2 in such a way that the hook tip is
at the level of the middle of the needle hollow groove 3.
Attention!
Needle bar 2 must not be twisted when being shifted.
–
Tighten screws 1.
ATTENTION !
After a correction of the needle bar height:
Check position of the hook protection and correct it, if necessary.
A wrong adjustment of the needle bar height can have the following
consequences:
–
Damage to the hook tip
–
Jamming of the bobbin thread between needle and needle
protection
3