JUKI LK-1900B series, Engineer'S Manual, Page: 51 / 174

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Adjustment procedures Results of Improper adjustment
1. Select the check program 02.
Refer to "6.-(3) X/Y motor origin adjustment".
2. Adjust the origin to be the dimensions that were described in "3.-
(21) Position of the mechanical origin" by the operation panel.
Adjustment procedures Results of Improper adjustment
1. Loosen the screw ❶ to adjust the clearance between the wiper
❷ and the needle so that this clearance attains 1.5 mm or more.
2. Loosen screw ❶ and adjust the distance A between the wiper
❷ end plane and the needle center until this distance attains the
values specified below.
After adjustments, tighten the screw ❶ firmly.
Distance A between the needle center and the wiper ❷ end plane
(A mm)
· Other than LK-1903B, 1903BN : 23 to 25 mm
· LK-1903B, 1903BN only
: 15 to 17 mm
* The needle stays in the position of the end of sewing and stop.
o
If Distance A is too small, the
work clamp foot may tread on
the needle thread when the work
clamp foot is lowered. At that
time, the needle thread may be
caught by the wiper
❷ and the
needle may be broken.
In particular, this must be taken
into consideration when a thin
needle (#11 or less) is used.