Owner's Manual

T-8420B, 8450B, 8720B, 8750B

7. THREAD TENSION

7- 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