24 25
REV. 2.1 22-06-2020REV. 2.1 22-06-2020
A
1st
2nd
+5.5
10.5
24.1
24.3
24.2
24.4
25.1
25.2
12.4- Upper and lower meeting point
The correct timing of the looper movement versus the needle has to be as in the images below,
when the needle goes up in the image 24.1 and when the needle goes down in the image 24.2.
The adjustment of this timing is done losing the grub screw from the belt gear from the upper
shaft through the service hole (image 24.4). The correct method to do this adjustment is to
move the needle bar 5.5 mm up from the dead lower point, then have to loose the two grub
looper reach the position shown in the image 24.3.
12.5- Looper translation movement
The looper translation movement has to be adjusted that when the needle is going down has to
pass almost touching the looper and in the same way when the needle is going upwards. The
translation movement is given by the eccentric highlighted as A in the imagine 25.1.
The correct position of the translation movement eccentric is: with the machine rotating in the
shaft joint bush, imagine 25.2.
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