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8-6. Adjusting the thread trimming cam timing
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
❶
❷
• Adjusting the bobbin thread clamp pressure
Loosen screw . Adjust the clamp pressure by turn-
ing cramp arm in the direction of the arrow.
Adjust the clamp pressure so that the bobbin thread
comes off at the pressure of 0.3 N.
Bring the moving knife to its front end. At this time,
position the thread trimming cam so that the two
marker dots on the handwheel align with the marker
line of the motor cover. Then, tighten thread trimming
cam setscrew ❷ to fix thread trimming cam ❶ .
– 106 –
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