Positioning The Integral Adjusting Disc With Respect To The Arm Shaft - Duerkopp Adler 271 Service Manual

1.3 Positioning the integral adjusting disc with respect to the arm shaft

5 6
6
1
2
3
4
X
IMPORTANT
Adjustments carried out with the adjusting disc will only be correct if
the disc itself has been adjusted as described below.
If the arm shaft is moved, all subsequent settings must be checked
and adjusted if necessary.
Caution: danger of injury
Turn off the main switch.
The position of the arm shaft may only be adjusted with the sewing
machine switched off.
Regulation and inspection
The groove 4 and notch A of the adjusting disc on the
synchronous-belt pulley must coincide on the X - Y line.
–
Lock the arm shaft with a locking pin or a 5 mm Ø pin in the
arm-shaft groove 4 (through hole 3).
–
It must be possible to pass the locking pin through the hole 2 in
position A into the integral adjusting disc.
Adjustment
–
Remove bobbin-winder cover 1.
–
Undo the screws of synchronous-belt pulley 6 from above with the
Allen key 5 through the hole.
–
Lock the synchronous-belt pulley in position A with the locking pin.
–
Insert a 5 mm-thick pin into the rig hole 3 and allow it to engage in
the arm-shaft groove 4.
–
Tighten the screws on the synchronous-belt pulley 6.
The synchronous-belt pulley must not be axially shifted.
Y