Setting The Upper Dead Center - Duerkopp Adler 579 Service Instructions Manual

3. Setting the Upper Dead Center

8
Caution Risk of Injury!
Set the upper dead center only in the "Safe Stop" position or with the
machine turned off.
Rule and Control
With the aid of of the proximity switch, the automatic buttonhole
machine recognizes if it is at the upper dead center in front of the left
or right needle entry point.
If the needle bar is at the upper dead center for the left needle entry
point, the screw 2 must lie in front of the proximity switch 3.
The clearance between screw 2 on the set collar and proximity switch
3 may be a max. of 0.5 mm.
Insert the positioning pin for the arm shaft in the appropriate drilled
hole (see Chapter 2).
Correction
Stake out arm shaft.
–
Loosen screw 1.
–
Turn the collar on the shaft.
–
Tighten screw 1.
–
Loosen screws 4.
–
Move proximity switch 3 so that the clearance between screw 2
–
and proximity switch 3 is a max. of 0.5 mm.
Tighten screws 4.
–
Remove the positioning pin.
–
1
2
3
4