Stephen Lathrop on thu 31 dec 98
Chris, with the balance problem.
I had the your problem with my balance but I was not in a warrantee
situation. I was given a balance so I felt nothing ventured nothing gained
when it came time to fix it. My balance pointer and hanging plate between
the magnets was rubbing the tower. The tower being the housing that
surrounds the pointer and contains magnets inside. The pointer and plate as
you have keenly noted should not touch when the balance arm swings up and
down. If you chose to try to correct it and make a mistake the manufacture
may not make good on the fix.
The tower is all thermo plastic and so if it was ever exposed to heat it
could have deformed slightly. The plastic tower could have had something
leaning against it for an extended time causing the plastic to "cold flow"
[flow or move with out heat over time]. Or plastic flashing from the
original molding of the tower may be found on the base where it attaches to
the frame. Thus the flashing could be preventing the tower from sitting
square on the base. Your problem is most likely the last on your new
balance. However, the fix is the same for all the above.
First, note where the beam pointer [swing arm] and its attached plate are
contacting the tower. If it is contacting on the front then the front of
the tower is too high. The opposite if it is touching in the back. Now to
remove the tower to modify the base. Do not turn the balance on its side or
turn it over. The beam swings on two pivots of tungsten carbide that rest
in two pieces of agate stone "V" blocks. They can be damaged if the balance
is in any position other than up right.
Slide the end of the balance over the edge of a work bench just far enough
to look up under the end of the base and see the large screw the mounts the
tower to the frame. Remove the screw and the tower is detached from the
base. The base can now be shaved with a scaple blade razor blade or sanded
only on the side that was contacting the pointer. Remove only material
equivalent to the thickness of a piece of paper. Resemble and test for
clearance. Repeat if necessary.
An alternate method is to use aluminum foil under the opposite side that is
rubbing as a shim. Do not use paper as it changes with moisture in the air
and will loosen over time.
I will send this to ClayArt also in case someone else has had the same
problem.
Steve
Pirates Pottery in PA.
dorothy kelba on sat 2 jan 99
Thanks Steve for sending this info to Clayart. I've had the same problem with my
only seemed to happen with heavier weights I just worked around it. I tried the
the aluminum foil and it worked like a charm. The arm swings free with no sticki
again.
--
Dorothy
dkelba@bc.sympatico.ca
------------------------------------------------------------------------
> Subject: Re: fixing Ohaus scales or how I fixed mine
> Date: Thu, 31 Dec 1998 12:15:26 EST
> From: Stephen Lathrop
>
> ----------------------------Original message----------------------------
>
> balance. However, the fix is the same for all the above.
>
> First, note where the beam pointer [swing arm] and its attached plate are
> contacting the tower. If it is contacting on the front then the front of
> the tower is too high. The opposite if it is touching in the back. Now to
> remove the tower to modify the base. Do not turn the balance on its side or
> turn it over. The beam swings on two pivots of tungsten carbide that rest
> in two pieces of agate stone "V" blocks. They can be damaged if the balance
> is in any position other than up right.
>
> Slide the end of the balance over the edge of a work bench just far enough
> to look up under the end of the base and see the large screw the mounts the
> tower to the frame. Remove the screw and the tower is detached from the
> base. The base can now be shaved with a scaple blade razor blade or sanded
> only on the side that was contacting the pointer. Remove only material
> equivalent to the thickness of a piece of paper. Resemble and test for
> clearance. Repeat if necessary.
>
> An alternate method is to use aluminum foil under the opposite side that is
> rubbing as a shim. Do not use paper as it changes with moisture in the air
> and will loosen over time.
>
> I will send this to ClayArt also in case someone else has had the same
> problem.
> Steve
> Pirates Pottery in PA.
>
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