Bobbin Housing Elevator; General; Bobbin Housing Elevator Path - Dürkopp Adler M-Type 869 Serviceanleitung

2.7 Bobbin housing elevator

2.7.1

General

2.7.2

Bobbin housing elevator path

3
24
The thread lever must draw the thread between the bobbin housing
and its retainer.
So that the thread can slip through unhindered, the bobbin housing
must be raised at this time.
As a result the required seam construction is achieved with the lowest
possible thread tension.
Incorrect settings may have the following effects:
–
Thread breaking
–
Loops on the underside of the seam
–
Loud noises
2
Caution: Danger of injury!
Turn off the main switch.
Only check and adjust the bobbin housing elevator when the
machine is switched off.
Standard checking
The bobbin housing elevator 3 should raise the middle part of the
hook 2 so that the sewing thread can slip through unhindered between
the bobbin housing lug and the throat plate recess.
The elevation gap X depends on the thickness of the thread to be
sewn.
–
Turn the hand wheel and check whether the bobbin housing
elevator opens the bobbin housing far enough.
1