Adjustment Of The Thread Tension - Mitsubishi PLK-G6030 Technical Manual

6-3. Adjustment of the thread tension

(1) Adjustment of bobbin thread tension
Adjust the bobbin thread tension with the thread tension
adjusting screw (No.2) on the bobbin case (No.1). The thread
tension becomes loose when loosening the thread tension
adjusting screw (No.2) counterclockwise, and the thread
tension becomes tight when tightening the thread tension
adjusting screw clockwise.
(2) Adjustment of upper thread tension
Adjust the upper thread tension corresponding to the bobbin
Thread tension. The upper thread tension becomes tight when
tightening the thread tension adjusting nut (No.1) clockwise,
and the upper thread tension becomes loose when loosening
the thread tension adjusting nut counterclockwise.
<1>: Thread tension adjusting nut
<1>
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<1>
<1>: Bobbin case
<2>: Thread tension adjusting screw
<2>