Question about Yamata FY14U4AD

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Bobbin doesn't fill in bobbin winder

I just got a yamata 8500 industrial machine and I'm trying to get the bobbin winder to work, with no luck, does any one know why the bobbin is not getting the thread? when I put the bobbin in the winder it seems to me that it is a little lose is it suppossed to be snug? please help. Thanks

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The bobbin winder question is a frequent one and it is very easy to solve. If you look at the shaft where the bobbin sits on the bobbin winder, you will notice that it has a slot in the middle of the shaft, an opening if you will. This is where you use a flat screw driver and open that space more to give more friction to the bobbin so it is not loose on the shaft. That slot was made for that. There are different bobbins on the market so thats why the slot is there. If it is too tight, grab a pair of pliers and close the gap. The metal of the bobbin winder on that shaft is malleable exactly for this reason. No need to put plastic bag material or anything like that. Use it as it was intended for.

Posted on Jul 08, 2008


Actually the thread needs to be not only started around the bobbin but also go through the slot at the end of the bobbin shaft to accomplish the same thing as the plastic bag

Posted on Feb 03, 2008

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Yes i have found the solution if this is help to anyone, the bobbin needs to be tighter around the winder so i put a small plastic bag material on the winder where the bobbin goes and put the empty bobbin on top, wound the thread round and it started filling it up. So remember the bobbin must be firmly stuck on winder. Hope that resolves anyones problem, it did mine.

Posted on Sep 16, 2007

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The belt isn't touching wheel to wind up the bobbin what can i do to fix it

Posted on Apr 03, 2009

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1 Answer

When I try to fill my bobbin the thread gets all balled up on top of the bobbin instead of filling it. What should I do?

Consult your owner's manual. Chances are you may be threading the thread incorrectly. Make sure it is going through the bobbin winder tension guide before going to the bobbin winder mechanism.

If it continues, the bobbin winder may need a height adjustment. I had that issue with a machine that the case surrounding the bobbin mechanism was slightly misaligned. Once it was fixed, the bobbin winder worked perfectly.


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When i turn the balance wheel or use the foot controller, the needle doesn't raise or lower. I put the bobbin winding assemby in the right position. The machine is on.

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If it's of the second type, try turning the bobbin winder on again, and then off, crisply. Otherwise my best guess, barring other information, is that the lubricants have gone gummy or evaporated. Do you hear a motor hum?

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There is a manual for a Touchtronic 2000 here there may be more than one model Touch Tronic so plse check the serial number plate on the side of your machine to establish the actual model number, usually near the power inlet plug. then search for the appropriate manual at This excerpt shows that you wind the bobbin insitu in the bobbin case.

I'm not a fan of prewound bobbins, far better to deal with the bobbin winder issue. Winding your own thread means you can get far better colour matching to the fabric, and ensure you've got quality thread on the machine, and same thread top and bottom. (I prefer a quality cotton wrapped polyester or a polyester thread, Guttermann, Molynecke or Sylko Supreme). All of these factors affect stitching quality and the finished appearance of a seam.

Did you know that you can buy a freestanding unit to wind bobbins? Link to this item is here. You may well find that this is the better solution to winding bobbins for this machine as winding them inside the bobbin housing doesn't give you a lot of control over the way the thread feeds onto the bobbin.

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I just bought the same machine and mine came with a photocopied manual. There is indeed a bobbin winder on the side, there's a flat section on the side of the bobbin winder closest to you, if you push that forward it connects a wheel attached to a bobbin spoke, to the belt that runs between the machine and the motor. To wind the bobbin, put the bobbin on sideways onto the axis of the wheel that is on the inside of the machine, and push the bobbin winder forward.
If you're looking for where the bobbin case is located on the machine, if you look underneath the machine on the left hand side, there should be a metal belly, on the left side of the belly is an opening, and in there sits the bobbin casing.
I think you were asking for either one of these answers, I'm on here troubleshooting for my Juki DDL-8500, good luck with yours, hopefully I can find what I need to know too!

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