Thread Trimmer Cam Position Adjustment And Connection/Disconnection; Thread Trimmer And Presser Foot Origin Sensor Adjustment - JUKI LK-1900AN Engineer's Manual

(12) Thread trimmer cam position adjustment and connection/disconnection

1. Loosen the two set screws 2 of the thread trimmer cam (cam hereafter) 1 .
2. Loosen the two set screws 4 and remove the sensor slit 3 .
3. Remove the four set screws 5 and take out the presser lifting motor 6 in the direction of the arrow.
In some cases, the bearing 7 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 7 .
At that time, the cam 1 may come down. Handle it with care, not to damage it.

(13) Thread trimmer and presser foot origin sensor 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 1 .
Procedures of disassembling
Standard adjustment
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