From: "Scott Berfield" 
To: "ATM" 
Reply-To: "Scott Berfield" 


Sounds like a nice setup, but even if high precision, you will likely want
some sort of friction clutch set up to make it controllable. While I am not
a Dob user, on the occasions when I have used others' the nicest thing
about it was the smooth motion -- move it easily, but have it stay where it
is stopped. Too easy a rotation and you will have a really cool looking
weather vane.

-----Original Message-----
From: owner-atm{at}shore.net [mailto:owner-atm{at}shore.net] On Behalf Of
Hugues.Laroche{at}ses-astra.com
Sent: Thursday, May 22, 2003 11:37 PM To: hermit
Cc: atm{at}shore.net; Guy Brandenburg; owner-atm{at}shore.net; Steven Hammond
Subject: Re: ATM Building a Dobsonian, 2 Questions




Hi there,

>You wish. ;-)  Actually they are just plain crappy in this application,

>unless you can get something high precision.

Hm, interesting, I was preceisely considering some thing of the kind:

 it is a large ball-bearing-based ring that a local company can supply
in sizes up to a bit more than one meter. The normal ;-) use if those seem
to be for 2 axes trailers, where one axes can be rotated around a vertical
axis. They are dimensioned to support several hundreds/thousands of Kg/lb
(anyway, overdimensioned, that is).

Do you think it would have the same defaults as the mentioned lazy susan?

TIA, and have a good week-end!

Hugues
Luxembourg, Europe



--
DISCLAIMER:
This e-mail contains proprietary information some or all of which may be
legally privileged. It is for the intended recipient only. If an addressing
or transmission error has misdirected this e-mail, please notify the author
by replying to this e-mail. If you are not the intended recipient you must
not use, disclose, distribute, copy, print, or rely on this e-mail.

--- BBBS/NT v4.01 Flag-4