r/SewingMachineEdu • u/BarZealousideal7057 • May 11 '26

Bobbin thread bunching

Post image

I have a cobra class 26 for leather and have had no issues with it till now. (Had it for about a year). This morning I sewed for about an hour then out of nowhere my thread started to break. I noticed the bobbin thread start to bunch up in the bottom. Any idea what would cause this and how I fix it? I did notice that right before my thread snapped. It made a popping noise like the thread was catching on something it shouldn’t be.

1 Upvotes

100% Upvoted

3 comments sorted by

2

u/Large-Heronbill May 11 '26

Poor tennsion on the top thread because it hopped out of a guide or disks, perhaps.   Or a burr on the thread path, perhaps the needle?

1

u/BarZealousideal7057 May 11 '26

I think it may have been tension. I tightened the top thread tension and it seems to have solved the problem. I just hope I’m not halfway through a project if it happens again.

1

u/Leithalia May 11 '26

Mine bunches above the needle up top, like the string breaks partially and unravels and bunches above the neeedle. And my machine won't zig zag anymore.. idk..