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2) Upper Thread Tension Adjustment
Thread tension adjustment is critical for producing high quality of the embroidery. A balance of 2/3 upper
thread and 1/3 lower thread generally indicates good tension.
– The upper thread tension is controlled by sub and main thread tension adjusters. Turn adjusting nut
clockwise to increase the tension and counterclockwise to decrease the tension.
– The sub thread adjuster should control about 2/3 of the upper thread tension.
– The main tension adjuster should handle the other 1/3.
– Set the tension of the sub thread adjuster so the upper thread flows smoothly through the rotary tension
disks and into the rollers of the main tension adjuster.
Adjusting nut
Sub thread
adjuster
Main tension
adjuster
1) If tension is too weak
The upper thread will loop, causing thread tangles or breaks.
2) If tension is too strong
Puckering may occur as well as thread and needle breaks.
CAUTION
1) If tension at the sub thread tension adjuster is too loose, the detector roller may not rotate
well and make wrong detections.
2) After adjusting the tension, check if the upper thread tension is what can be pulled with little
force of around 100-120g.
3) After adjusting the tension, pull the upper thread to see if the detector roller rotates well.
4) Adjust the tension constantly according to the type of thread and fabric used.
CAUTION
Summary of Contents for MA-6
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