The lower tension of my NM 902 - 05 delta sewing machine is very loose. How do I get the right tension?

Lulu, July 2010

Hello Lulu,
On the bobbin case you will see a screw, turn the screw clockwise about a quarter of a turn at a time to tighten, test sew inbetween tightening, make sure the bobbin is in the correct way round so it turns anti clockwise as you look at it.
Ken

drivewithken, July 2010