JUKI LK-1900A, Engineer'S Manual

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(11) Thread trimmer cam position adjustment and connection / disconnection
Procedures of disassembling
1. Loosen the two set screws of the thread trimmer cam (cam hereafter) .
2. Loosen the two set screws and remove the sensor slit .
3. Remove the four set screws and take out the presser lifting motor in the direction of the arrow. In some
cases, the bearing and the motor shaft seem to be tightly coupled. Pull out the motor shaft in the direction
of the arrow straightforward in order not to hurt the bearing .
At that time, the cam may come down. Handle it with care, not to damage it.
(12) Thread trimmer and presser foot origin sensor adjustment
Standard Adjustment
In the state of origin retrieval (Start Switch ON) in the test mode CP-6, the standard holes
A
and
B
of the
sewing machine frame come to coincide with the standard hole
C
of the thread trimmer and presser bar lifter
cam .
E
A
D
B
C
A
B
Flat section
A
B