[amayausers.com] Re: Thread Breaks/Pull on Needle 6
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- Date: Thu, 9 Jun 2011 14:30:18 UT
This message was posted by Rod or Sharon on AmayaUsers.com. PLEASE DO NOT REPLY
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When a problem is associated with one particular needle there are specific
things to look for.
1. Physically remove the red pinch roller and the inner threadfeed roller. Are
they lubricated well?
2. Visually, with a flashlite, check down inside the threadfeed roller pocket
for any thread that may be wrapped around the gears and shaft in that area. Any
excess drag or binding of the rollers will affect the proper amount of thread
being fed which in turn will result in fraying and/or breakage.
3. It may possibly be the thread. Does it happen regardless of the cone of
thread that is used on the #6 needle? Have you changed to a different cone of
thread? A case in point....while I was working on a machine, the operater was
sewing on a machine next to me. Continuous thread breaks finally led me to ask
what was going on. He had just changed to a new cone of black thread. I asked
if he had had any issues prior to changing thread cones, he said no. I had him
change to another new black cone of thread, same problem....I had him put the
original black cone back on that still had some thread left on it....problem
immediately went away. Tried a third new cone of thread and problem had
disapeared. Bad lot of thread was the issue in his case....sometimes stripping
off 20+ yards of thread off of a new cone will get you down to thread that may
not have been exposed to ultra violet. We have no way of knowing how old the
threads are that we purchase from our vendors. Could be fresh
, could be years old...?
4. Have you checked the hook timing closely. Hook timing is checked and
adjusted on the "closet" needle. Logically, if there is a closet needle, then
there is also a fartherest needle. The closest and fartherest needle
designations are located and written on the lower right side of the base
casting under the machine table top. Each machine is different. If the
needleguard gap is excessive on the closet needle then it will be "extremely"
excessive on the fartherest needle. This would lead to problems for the rotary
hook to pick up the top and/or bobbin thread properly, resulting in thread
breaks and/or fraying. The hook timing may be good as far as being advanced or
retarded, but if the needleguard gap isn't also set properly, well nuff
said....Also, each needle may have it's own gap but is strickly dependent of
the closet needle having the needleguard gap set as close as possible to the
back side of the needle during the hook timing procedure.
5. Design issues....does it happen regardless of the design being sewn? Rule of
thumb....the narrower the column or shorter the stitch that is being sewn, the
more apt the fartherest needles will miss picking up the top and/or bobbin
thread and completing a stitch.
6. Combine all of this with the needle being oriented properly left and right
which can also be specific to the type and brand of thread being used and the
speed it is being sew at....well nuff said again...
Rod Springer
Amaya Tech & Trainer
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