29 MA_VEB100-2-4-5_A5-3_230123_en.doc
3.3 Loop stroke
The loop stroke is the path of the needle from its right reversal point to the point
where the tip of the large gripping finger stands above the centre of the needle. (Fig.
15)
3.3.1 Adjusting the loop stroke
A T T E N T I O N !
Switch off the machine electrically!
In the factory setting, the loop stroke is 2.1 +3.0 mm for VEB100-4 and 2.8 +0.3 mm for
VEB100-2/-5. (Fig. 15)
Adjustment:
Unscrew the head of the connecting rod : Loop stroke becomes smaller
Screw in the head of the connecting rod : Loop stroke becomes larger
Thread slope = 0.5 mm per rotation
The following steps are required to rotate the head of the connecting rod (Fig. 12 and
Fig. 13):
- Unscrew the fillister head screw (9) Fig. 12 and push the looper forwards.
- Remove the nut (5) Fig. 12 from the looper shaft.
- Remove the cylinder head screws (4) Fig. 12 from the head of the connecting rod
(3) Fig. 12.
- Remove the adjusting ring (3) Fig. 13 and pull out the looper shaft including the
head of the connecting rod (3) Fig. 12 from the cross-beds (5) Fig. 13.
Do not remove the contoured bolt (4) Fig. 13!
The loop stroke can be determined using a special dial indicator or vernier caliper.
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