[amayausers] Speaking of bad bobbin spools......
- From: e3m@xxxxxxx
- To: amayausers@xxxxxxxxxxxxx
- Date: Thu, 09 Nov 2006 08:05:10 +0000
Speaking of bad bobbin spools....
Thought I'd share something I saw today that I haven't seen in a while.
Customer was having problems with thread breaks, false thread breaks, false
bobbin breaks, pull-outs and who knows what else I can think of, on one of
their four brand new Amaya XT's. When checking all of the customary settings
everything seemed to be in order.
I checked the bobbin and it was fine. So I decided to compare the bobbin
tension in the bobbin case while holding the bobbin in my hand and then again
as I inserted the bobbin case into the rotary hook/bobbin basket. What I found
was that the bobbin tension significantly increased as I "snapped" the bobbin
case into it's position.
What was causing this dilemma was the fact that the bobbin spool was too fat
for the bobbin case. Now I know we have an obesity problem here in the United
States but this is ridiculous.
This was one odd ball bobbin that apparently took on too much bobbin thread at
the factory and being too wide, was slightly protruding out of the back side of
the bobbin case which caused problems when the case was plugged into the
machine. This was from a brand new box of cardboard sided, Coats Brand,
bobbins.
Swapped bobbin out with another "thinner" bobbin spool and all our troubles
went away.
Now, I'm an advocate for the cardboard sided bobbins when it comes to "bang for
my buck", but this is one more check I will be checking more frequently from
now on.
Good luck to all,
Ed Orantes
Amaya, XT, Sequin, EMT & C Technician
504-258-6260
-------------- Original message from "Roland R. Irish III"
<signman@xxxxxxxxxxxxxxxxxxx>: --------------
> My first thought is to yank the bobbin holder out, totally clean it,
> check the tension, and start with a new spool for bobbin thread. Also
> pull the needle plate off, really clean inside there-look for thread
> stuck in there. Clean and check everything to do with the bobbin-so
> you can eliminate that as a suspect when you do a test run.
> Yes, once in awhile you can hit a 'bad' spool. The way this is random
> makes me think it is bobbin problem-maybe some lint
> stuck in the tension bar or the 'pigtail' causing it to get too
> tight, or forcing the tension bar 'up' so there isn't enough tension-
> causing the birdnesting underneath.
> If it was always the same needle you look for burr on the needle tip,
> worn needle, needle bar out of alignment, etc.
> but happening on different needles to me sounds like bobbin!
> Throw some scrap in to test it out after you change and see what
> happens.
>
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