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Subject: Re: another dead dec motor
From: Amtsgymnasiet,Sonderborg,DK,AGE
Reply To: mapug@shore.net
Date: Tue Apr 23 05:39:00 1996


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<I had ordered the Meade counterballance for my scope but it was backordered
<and I didn't have time to wait for it to be delivered or my semester would
<be over and my students very upset.

I know this feeling, tired of waiting , we have tried some alternative
methods..

Let me suggest another counterbalance method, the 2D balance method.

It is easy to construct, and it works perfect, within less than 10 seconds you
may counterbalance your scope to extreme accuracy.

The trick is to construct a kind of counterbalance, similar to what you see on
german mounts.


Drawing :

Scope

-Alu-profile----------------------------------------------------
XXXXXXXXXXXXXXXXX Metal plate, 1 Inch x 0.5 Inch x 8 Inch
----------------------------------------------------------------
! !
! !
! !
<-- ! ! -->
! !
! !
! !
! !
! !
____________
! counter !
! Weight !
! !
____________
! !
! !


Above , you see a standard , square alu-profile, to be mounted below your SCT.

This kind of alubar is well known, all kind of ship-yards apply this when
constructing modern sailing vessels.

A metalplate runs freely within this profile, the vertical metalpipe is
attached with a 1/2 Inch bolt to this metalplate.

Turning the vertical metal pipe clockwise, the bolt will lock the metal plate
in a fixed position.

The counterweight may be moved upward/downward too , and fixed in any up-down
ward position.

Material price, less than 4 Dollar, found most ready to use part on a visit to
the local metal-scrap company.

As written, this 2D method works perfect. We have mounted such a device on our
16" SCT, with less than 5 kilo counterweight, my students are able to balance
both a piggyback mounted 5", plus an ST6, to gram-accuracy within a few
seconds.


Best greetings,


Mogens Winther.