[amayausers.com] Re: Whining sound in bobbin shaft after 150,000 stitches every day
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- Date: Wed, 13 Aug 2008 12:53:17 UT
This message was posted by The Embroidery Authority on AmayaUsers.com. PLEASE
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Mike,
To start,... I don't know your knowledge status so forgive me for the basics.
The rotary hook (race) must be oiled with one drop of oil before every 3-4
hours of operation. At 1000 stitches per minute, give or take, this would be
around every 200,000 stitches. (Not far off from your 150,000 mark.)
You must also make sure you are getting the oil into the correct spot or the
oil won't do any good. Now, let's say this is not your problem. If the sound
is in fact coming from somewhere other than the rotary hook, I would say you
should have an experienced tech take a look at it. I have had to replace
bobbin shaft bearings before, on several occations, but they were on much much
older machines like the EMC series. Wait.... I take it back. I did have to
replace a rear bearing on a very early Amaya. Must have been faulty from the
bearing company. What can happen here is that these bearings are sealed so
that oiling or greasing is not necessary. If the seal breaks (you wouldn't
know this), the internal grease leaks out and then it's only a matter of time
before that bearing gives out.
To replace a bearing takes not only knowledge of the machine such as hook
timing but also a very good mechanical ability with the right tools.
Gook Luck.
Ed Orantes
Melco Tech & Trainer
504-258-6260
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