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Sec. 12 Adjustment of thread tension
Checking:
1. Set thread tension at the center of “AUTO” position.
2. Pull thread between tension discs and check thread tension value using 100 gr. tension gauge.
Measured value should be 40 to 50 g.
*When tension gauge is not available, do actual sewing and check balance of upper and lower
threads.
Adjustment:
1. Remove front cover and adjust by turning spring pressure adjustment screw.
*Turn it clockwise to increase tension.
*Turn it counter-clockwise to decrease tension.
When making adjustment without removing front cover,
1. Remove face cover and lower thread take-up lever.
2. Insert index finger and adjust by turning spring pressure adjustment screw as shown below.
Revised: January 2006