Reliable 787 - Manual (Page 19)

17
ADJUSTING THREAD TENSIONS
Turning tension dial to a higher number gives a tighter thread
tension. Turning tension dial to a lower number gives a looser
thread tension. The higher the number, the tighter the tension.
Test each thread tension on a scrap of the fabric you plan to
use.
TWO-THREAD USE
Just right Lower looper thread pulled to under side Needle thread Pulled to top side
Decrease needle tension Increase needle thread tension
FOUR-THREAD USE
Just right Upper looper thread pulled to top side Lower looper thread pulled to top side
Increase Upper looper thread tension
and/or decrease lower looper tension
Increase lower looper thread tension
and/or decrease upper looper tension
Increase left needle thread tension and/or
decrease either or both looper threads.
Left needle thread loose and visible on
under side of fabric.
Right needle thread loose and visible on
under side of fabric.
Increase right needle thread tension.