Hi, the bobbin holder on my machine is not staying in place. It keeps moving when I stitch or move the needle turner. It just doesn't stay in place and therefore I cannot use the machine. Please let me know what the solution to this is, how do I put the holder back in place so it doesn't move? Thanks

since the bobbin case is moving, the machine needs to be checked again, and this time the hook and hook race needs to be looked at, could also have a timing problem with the needles breaking.

Make sure brace that holds hook is locked, bobbin is pushed in til you hear it click and hand turn machine and if you hear it hit any metal, machine timing is out, let me know...thanks

something is broken, or slipped out of place. take it in for repair. While you are at it have it cleaned, checked and retimed if needed.

here are some suggestions, if the suggestions don't help then the
machine needs to be checked to see if there is a adjustment or
timing problem
1. try changing the needle
2. try rethreading the machine top and bobbin
3. make sure the bobbin is turned the right way in the bobbin
case

try changing the needle to see if that helps
if it doesn't,, then I suggest that the sewing machine be checked
at a repair shop to see if the bobbin case needs to be replaced and
to see if the hook and the hook race need to be replaced

the bobbin case may need to be replaced. it wouldn't hurt to have the machine serviced to make sure the hook & hook race are ok

Check the model number of the machine. White sewing machine manuals are available from Singer at http://www.singerco.com/accessories/instruction-manuals . Enter the model number and click Search.

The White Sew E-Z model W338 manual is available here: http://www.singerco.com/uploads/download/705_white-338-x.pdf .

Unlike some machines this one doesn't really need the bobbin threaded. Place the bobbin in the bobbin holder and leave about 5" of thread extended out from the bobbin holder. With the bobbin compartment still open, lower the presser foot and turn the handwheel to move the threaded needle through the stitch cycle. (I find holding the threads helps; normally, you'll feel them pulling under your fingers.) When the needle has returned to the top of the path, lift the presser foot. Then pull both threads around to the front (the bobbin thread should wrap around the top thread). Then move the threads to the back of the presser foot.

If the needle isn't catching the bobbin thread, first try a new needle (bent or dull needles don't always function properly). Next check the bobbin holder for nicks or other damage. There is a small hook on the bobbin holder that should be where the top and bottom threads intertwine. Under rare circumstances, you will find that the bobbin tension of the bobbin holder is misadjusted. This can interfere with the bobbin thread twisting properly. There is a little set screw that allows you can tighten or loosen the bobbin tension as needed. Adjusting the screw is to be avoided when possible and done in small increments (1/8 turn) if needed. It's easy to strip the threads for the set screw and end up needing to replace the bobbin holder.

I hope this helps.

Cindy Wells

This sounds like you have the machine in bobbin winding mode, just refer to your manual to take it out of bobbin winding mode. I'm not familier with your exact model, but the is typically a lever, or button that is used to wind bobbins, so the needle doesn't keep sewing without the bobbin thread in place.

Please rate my solution thanks

I looked at the 4210, here http://www.singerco.com/accessories/manuals.html

And I do not see any adjustment. Refer to the page for installing the bobbin - are you using the right size bobbin?

If the bobbin case/holder is trying to lift up and the thread is staying partly around it, your bobbin case may have turned part way.
Remove the needle plate and the bobbin case. The outer edges of the bobbin case should be very smooth. I suspect you may see a needle hole in the flat area that was under the foot. If so, you will probably wish to take it to your dealer and show them. They may smooth it or recommend replacing it. When the bobbin case is placed back into the hook cup that it sets in, the retainer at the 11 o'clock position on it should only allow the case to lift up about 0.8 to 1mm at the most. If it will lift up more than this, press down firmly on the retainer and move it closer to the bobbin case. You must have enough room for the thread to pass between the retainer and the bobbin case, but too much clearance will allow the bobbin case to turn in the machine and it will be damaged by the needle.