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
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
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
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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lpfull onethe bobbins winder that was a thread and shoul be clockwise rotation when coming out to bobbins case,if you to wound the thread on your bobbins winder, pull threads on spool then wind this in several times 4 to 6 rotation clockwise loop thread on top machine there is bobbins winder disc for tension put winder bobbins on shaft winder near hand wheel push the latch against bobbins winder to fit thead run machine to wind the thread.After hread wound in bobbins winder cut thread and insert winder to bobbin case as shown.
after set up was made on bobbins thread,set also the upper loop thead beginning at top of machine start on spool, pull thread and loop to upper disc tension then to the slot portion as in figure 
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