Question about Bernina Sewing Machines
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Posted on Jan 02, 2017
This unfortunately sounds dismally like a timing problem. When a sewing machine makes a sudden mechanical stop as when a needle is bent slightly and hits the needle plate, sometimes the other machine bits revolve along further causing the needle to be introduced into the hook either to early or to late to catch the thread.
To test this, remove the thread, the needle plate and and the bobbin case. Replace the needle with a brand new one. Yes, again. Revolve the machine by hand via the balance wheel and watch closely as the needle goes into the hook region allow it to it move down and then just start to move up. If the tip of the hook is not pretty close to right behind the needle than it is more than likely a timing problem.
If the tip of the hook is behind the needle in the scarf (the slight hollow on the back of the needle) than it is not timing. Thread the machine normally like it is and watch what happens as you manually turn the machine via the balance wheel. The thread should catch and be pulled around the hook and let go.
Try this and then either you figured it out the problem or contact me again. Either way please vote. Thanks
Posted on Mar 02, 2008
SOURCE: Bobbin winder won't spin
The two most common problems are that you either need a new bobbin tire, or just need to adjust the position of the winder a little closer to the hand wheel. Remove the top cover and you will see the winder assembly. Loosen the two screws that hold the assembly nudge it closer to the hand wheel side. If you move it too far the winder will constantly spin. Also, examine the rubber tire, it may have a flat spot on it in which case it needs to be replaced. If it is worn out you may not be able to tell just by looking at it.
These winders can be tricky to adjust but why not try?
Posted on Feb 06, 2009
SOURCE: bobbin spindle won't spin
Check the bobbin winder rubber, it may be worn or broken and insufficient friction against handwheel to turn.........or a thread jam around spindle is stopping the spin. In this case, carefully unwind, DO NOT cut thread.
Posted on Sep 01, 2009
If you take the top off you will see a tiny rubber tire that engages the winder to the handwheel. Over time they get really soft are really hard and disintgrate. If you have a local sewing shop take the old one in and get a new one to slip on it takes only a few minutes and cost usually less that $2.00
Posted on Jan 22, 2010
Can be dirt or particles that have made it stuck with friction and so a resetting /overhauling with good oiling, degresing will resolve the matter, provided there is wearing off in the drive.
First use a degreasing spray before you can disemble.
Posted on Sep 30, 2010
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