[Woodcarver] Foredom Noise

[Mike Bloomquist]

Jim,

 

Not knowing the exact placement and orientation of the crack these are all
just a shots-in-the-dark, but.. 

 

The easier problem might be that something got dislodged on the inside of
the motor and is rubbing against the rotor as it turns.  Even the corner of
a piece of plastic sheeting would do this.  If you are going to disassemble
it, that is what I would look for.

 

The harder problem may be that, if the crack is opened up wide enough to
make it visible, the bearings at each end of the rotor shaft may be very
slightly out of alignment.  It may not be heating up noticeably now, but
this is not a good thing and probably will worsen over time.  A stopgap (and
this REALLY depends on the placement and alignment of the crack) is to wrap
the motor casing with hose clamps. the kind you tighten down with a
screwdriver to hold plastic/PVC hoses onto fittings.  Depending on what you
can find, this may mean joining two together to reach all around the motor
casing.  If, when you tighten this down, it compresses the crack, it may
also realign the bearings and make the whine go away.  'Course this will
look pretty cobbled together, but it may stop or lessen the damage that
whine is telling you about.

 

The worse case is that the impact which caused the crack permanently
deformed the casing (and misaligned the bearings).  That means a new casing
to fix the problem (or a 5lb hammer and divine guidance <G>).  

 

Whatever way it turns out, your best solution is a new casing (maybe from
the source www.foredom.com or the site Bobby gave).  All the usual
disclaimers apply, and Good Luck. 

 

Keep on Carvin'

-Mike B.->

Wooden Dreams Woodcarving

http://www.borg.com/~bloomqum

 

-----Original Message-----
From: woodcarver-bounces at six.pairlist.net
[mailto:woodcarver-bounces at six.pairlist.net] On Behalf Of Woodcarvr at aol.com
Sent: Saturday, March 01, 2008 11:05 PM
To: woodcarver at six.pairlist.net
Subject: [Woodcarver] Foredom Noise

 

I need some insight from some experienced power carvers.  I have a Model H
Foredom.  It fell on the floor and hit hard enough to actually crack the
case where the vent holes are in the top.  Since this happened, it still
seems to run just fine, but it makes a different noise than before.  The
noise comes from the motor housing, not the cable or handpiece.  It is kind
of a high pitched whine or squealing.  It isn't unbearable but it is
annoying.  There isn't any evidence of sparking or heat buildup.  I am
tempted to take it apart to see if I can find what the problem is, but I
want to feel somewhat assured that I won't be opening a can of worms and
find that I can't get it back together again.

 

So if anyone has had any experience with a similar situation I would
appreciate any help.  The machine, of course, is no longer under warranty,
so I am trying to see what I can do on my own.  

 

Thanks

 

Jim Williams





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