SunStar HC Series - Upper Threading and Tension Adjustment

4-3) UPPER THREADING AND TENSION ADJUSTMENT
1) Upper Threading
Upper thread stand
Upper thread
(from the upper
thread stand)
Sub thread adjuster
Thread tension
adjustment board
Thread detecting
roller
Take-up lever spring
stopper
Take-up spring
Rotary tension disk
Main thread tension
adjuster
Upper thread guide
Thread guide (upper)
Take-up lever
Thread guide
(middle)
Thread guide
Upper thread holder
Presser foot
Needle
[Fig.4-3]