Why does bobbin make thread bunch up

SOURCE: Singer 6217C Bobbin Thread bunching

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SOURCE: Bobbin thread bunching

I have a Kenmore 16231 That kept bunching up on the bottom side of the material. I found to correct this problem, there is a tension adjustment under the cover on the left side of the machine ( the light is housed under this cover) I found a tensiner lever numbered 1 - 4 and if you try this adjustment on 3 or 4 this machine works great. hope this helps

Rick

• 202 Answers
• Posted on Feb 11, 2009

SOURCE: Thread is bunching underneath fabric

Needle in correct? Be sure your bobbin is not in upside down and turning the wrong way. Possibly the hook that the bobbicase fits in/on has been hit by a needle and caused a burr that is catching the thread as it comes around. The burr would have to be polished off or hook replaced. The machine could be slightly out of time also.

SOURCE: Bicor vx1005 ...thread keeps bunching

Try a different bobbin. Look for one that is a little narrower. I had the same problem and changing to a narrower bobbin fixed it.

SOURCE: mass bunching of thread in the bobbin compartment

it had nothing to do with the shuttle, it is the upper thread is not in the tensioner. lift the presser foot up and thread the machine even if you have to hold the thread on the top and pull on the bottom to make it go in the tensioner it will help, if a machine loops on the bottom it is the upper tension if it loops on the top it is the lower tension