Why does the upper thread keep breaking?
There could be several reasons why the upper thread keeps breaking.
- The upper thread could be installed incorrectly.
Rethread the machine according to the instructions in the manual.
Please refer to "Upper threading" of "Preparation" category.
- The upper thread tension could be set too tight.
Set the tension to the basic thread tension setting or less.
- Make sure the spool of thread is installed correctly using the correct size spool cap for the size of spool.
One Point Advice Place a spool of thread on a spool pin.
- The combination of needle size, thread size, and fabric is incorrect.
Be sure to use the correct needle and thread size for the fabric you are sewing.
(Example: Denim-size 16 needle and 40-50heavy-duty threads).
One Point Advice Combination of fabric, thread and needle
BC-2100/BC-2100PRW, BC-2500, BM-3500/2600, BM-3600, CS-6000/6000b/6000t, CS-8060, DS-120, DS-140, FS101, FS155, FS50, FS70, Innov-is 1000, Innov-is 1200, Innov-is 1250D, Innov-is 1500D/1500, Innov-is 200/200QE, Innov-is 210, Innov-is 400, Innov-is 4000D/4000, Innov-is 410, Innov-is 4500D, Innov-is 500D, Innov-is 600, Innov-is 610, Innov-is 6700D, Innov-is 6750D, Innov-is 900, Innov-is 950, Innov-is 980D, Innov-is I / Innov-is 6000D, LS-2125/2160, LS-2150, NS10, NS15, NS20, NS25, NS30/30LE, NS35, NS50, NS55, NX-200/200QE, NX-250, NX-400Q/400, NX-450, NX-600, PQ-1500/1500S, PQ1500SL, PS-53/55/57, QC-1000, QC-2000, SL500, SuperGalaxie 3000/3000C/3000D/3100D, XL-2120/2220/2230/2240, XL-2600/2620/2630, XL-5500, XL-5700, XL-6040/6050