Singer 14J250 Stylist II Serger Instruction Manual - Page 41

ADJUSTING THREAD TENSIONS Turning thread tension control dial to a higher number gives a tighter thread tension. Turning the thread control dial to a lower number gives a looser thread tension. The higher the number, the tighter the tension. Test thread tensions on a scrap of the fabric you plan to use. Increase tension TWO-THREAD USE Just right. Under side Needle thread Lower looper thread Lower looper thread pulled to under side. Under side Needle thread pulled to top side. Under side Lower looper thread Lower looper thread Decrease tension Needle thread Top side Fig. 1 Needle thread Top side Decrease needle tension. Fig. 2 Top side Fig. 3 Increase needle thread tension. FOUR-THREAD USE Just right. Under side Upper looper thread pulled Lower looper thread pulled to to under side. top side. Under side Lower looper thread Under side Left needle thread loose Right needle thread loose and visible on under side of and visible on under side of fabric. fabric. Under side Left needle thread Under side Right needle thread Upper looper thread Left needle thread Top side Lower looper thread Right needle thread Fig. 1 40 Upper looper thread Upper looper thread Lower looper thread Top side Fig. 2 Top side Fig. 3 Increase upper looper thread Increase lower looper thread tension and/ or decrease tension and/or decrease lower looper tension. upper looper tension. Top side Fig. 4 Top side Fig. 5 Increase left needle thread Increase right needle thread tension and/or decrease either tension. or both looper threads.