T-8421C, 8422C, 8452C, 8722C, 8752C
10. THREAD TENSION
52
10-2. Adjusting the presser foot pressure
Correct stitches
Upper thread
Skipped stitches occur
Increase the pressure.
Uneven stitch length
Stitches are puckered
Decrease the pressure.
The presser foot pressure should be as weak as possible,
but strong enough so that the material does not slip.
(Refer to “Adjusting screw height” in the table below as a
guide to adjustment.)
1. Loosen the adjusting nut (1).
2. Turn the presser adjusting screw (2) to adjust the presser
foot pressure.
3. Tighten the adjusting nut (1).
Reference values
Use Adjusting screw height
For foundation Approx. 34mm
For light-weight and
medium- weight
materials
Approx. 34mm
For heavy-weight
materials
Approx. 29mm
0894M
0895M
0896M
0897M
2925M
Becomes stronger
Becomes weaker
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