27
3-15-4
If it is out of the standard, adjust dial tension regulator. Push
forward to get a weaker tension and do it in reverse way to get a
heavier tension.
3-15-5
Use the gauge to re-check the tension strength to see if it fits
the standard (60~70gf).
3-16. Adjust the bobbin case tension
3-16-1
Use a flathead screwdriver to remove the needle plate.
3-16-2
Take out the bobbin case
3-16-3
Put a thread into the tension meter (50gf) and place the thread in
between the bobbin case spring.
Pull the thread up to measure the tension strength.
The standard should be within 13~17gf.
