I know a proper method of setting up the chopper assembly but it requires
the use of an oscilloscope which is unfortunately an instrument that most
people do not have or do not know how to use.You can do it by ear but it is
only a rough method and a lot of luck is included.


Brandon S. Jones
Computer Officer
Systems Software and Network Management
School of Electrical and Electronic Engineering
University of Birmingham
UK
0121-414-3129
Fax 0121-414-4291



-----Original Message-----
Sent: Friday, May 14, 1999 5:58 PM
Subject: Re: [M]: RE: Hot observatory


At 08:56 AM 5/14/99 +0100, you wrote:
>My LX200 has worked ok over -15 deg c to +35 deg c with minimal problems
>from the
>drive chopper set up.Until I set up the potentiometers for best results at
>15 deg c I had problems with the drive at temperature extremes.It would
>stutter too much and lose tracking pulses so go out of alignment over a
>period of time.

Brandon,

Do you agree that there has been far too little posted about those
adjustments? I have seen references to them periodically, but no real
traffic to speak of. Sounds like they are likely candidates for DEC
runaways and other related failures.


Paul Goelz
Rochester Hills, MI
pgoelz at eaglequest dot com

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