58
29. Setting the synchronizer
Requirement:
If the foot control is released, the needle bar must stop at its highest position and the upper overedge loo-
per must have a clearance of 3.0 - 5.0 mm to the needle “R2” (fig. 66).
Check:
● Switch on the machine.
● Press the foot control for a short period of time.
● Release the foot control.
● Carry out a visual check.
Setting:
● Remove the stand cover as described in the adjustment and repair instructions.
● Press the foot control for a short period of time.
● Release the foot control.
● Turn the hand wheel in the normal direction and set the clearance of 3.0 - 5.0 mm between the needle
“R2” and the upper overedge looper.
● Loosen the fastening screw 39 (fig. 66).
● Set the washer 40 as shown in fig. 66.
● Tighten the fastening screw slightly.
● Check the setting of the needle bar and the upper overedge looper.
● Keep repeating this procedure until the setting is correct (as seen in fig. 66).
● Tighten the fastening screw 39.
Test:
● As described under “Requirement”.
● Mount the stand cover as described in the adjustment and repair instructions.
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