October 26th, 2011, 01:58 PM
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#5 (permalink)
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Senior Member
- Join Date:
- Dec 2009
- Posts:
- 421
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- 117 times
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Re: bobbin thread showing
Chances are the tensioner on your bobbin holder has build up in it which does not allow for the tensioner to apply the tension correctly on the bobbin thread.
Remove the bobbin use the side of a business card and slide under the tensioner to remove the build up, then re-insert the bobbin and do a tension test. Thread the bobbin as normal except for the pig tail, hold the bobbin thread only and do a slight jerk, the bobbin in its case should not be able to unroll with only its weight that means the tensioner is to loose. What you are looking for when you do the small jerk is only a couple of inches of the bobbin to release. That is a good starting point for tension, finish threading through the pigtail and test.
The bobbin cases should be cleaned daily and tension checked, if running full eight hours a day clean them half way through. What we do in our business is have more than enough extra bobbin cases cleaned and ready to go at all times.
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