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9. Adjusting of the stitch length before trimming
Depending on sewing conditions, the stitch immediately before trimming may not be formed correctly.
This may cause the trimmed tail length to be long.
In this case, adjust the length of the stitch immediately before the trimming position to ensure that a
proper stitch is formed. As reference, the standard stitch length is 1 to 2 mm. The length of the stitch
immediately before trimming can be adjusted by moving the position of the knuckle to the air cylinder
shaft up/down. Adjust with the following methods.
(1) Loosen the nut on the knuckle.
(2) Rotate the air cylinder shaft.
Adjust the position of the knuckle to the air cylinder shaft.
(3) The stitch immediately before trimming is as follows.
･
During forward stitching: Looking from above, turn the shaft clockwise to change to reverse stitching.
･
Too short during reverse stitching: Looking from above, turn the shaft clockwise.
･
Too long during reverse stitching: Looking from above, turn the shaft counterclockwise.
The stitch length changes about 1 mm when the shaft is rotated once.
In the position of the knuckle when shipping, dimension A between the lower surface of the air cylinder and
the upper surface of the knuckle is 19 mm like the below figure with the air cylinder drawn in.
10. Setting up the XC-GMFY control box
Set the control box to machine model LU2-4412 by simple setting function.
AXIS
NUT
KNUCKLE
A
