401a bobbin chatter and tension issues
03-10-2018, 10:01 AM
#11
Member
Join Date: Feb 2018
Posts: 90
The metal 66 bobbins you buy today are all from china and are of poor quality. If you buy 20 you will have to
throw 5 away. Their dimensions are not consistent. Some will be too tight in the bobbin case. You need to test
each one first in the bobbin case to see they spin free and throw any tight ones away. The plastic bobbins seem
to work much better than these new metal ones.
Also you can get a burr on the needle plate where the thread passes through and this will cause you fits. If the
needles have hit the plate by the hole their will be rough spots that the thread will catch on. Your machine should
have come with a straight stitch plate also. Put that plate on with the straight stitch foot and see if it sews better
and quieter. If so order a new zigzag plate. You can get new ones.
throw 5 away. Their dimensions are not consistent. Some will be too tight in the bobbin case. You need to test
each one first in the bobbin case to see they spin free and throw any tight ones away. The plastic bobbins seem
to work much better than these new metal ones.
Also you can get a burr on the needle plate where the thread passes through and this will cause you fits. If the
needles have hit the plate by the hole their will be rough spots that the thread will catch on. Your machine should
have come with a straight stitch plate also. Put that plate on with the straight stitch foot and see if it sews better
and quieter. If so order a new zigzag plate. You can get new ones.
03-13-2018, 04:42 PM
#12
Senior Member
Join Date: Jul 2017
Posts: 808
If the bobbin case is worn, maybe putting one of those teflon bobbin washers will help. I think its a Sharon Schamburg thing. I saw them on Amazon. That would lift it up a smidge, but it would still be slippery so it spins freely.
03-15-2018, 12:50 PM
#14
Super Member
Join Date: Jul 2013
Location: Houston, TX
Posts: 9,606
03-15-2018, 01:28 PM
#15
Super Member
Join Date: Mar 2016
Posts: 2,853
My point was that you wouldn't have several bobbin cases. You seldom, if ever, take it out, like you would on a 15-91. So you never loose it or drop it or whatever.
But, since you asked, I looked it up. Now I know. Thanks.
bkay
[ATTACH=CONFIG]590903[/ATTACH]
But, since you asked, I looked it up. Now I know. Thanks.
bkay
[ATTACH=CONFIG]590903[/ATTACH]
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