RE: [APML] Guiding a TV-85 on a GM-8 with an ST-4

["Gene Horr" <genehorr@houston.rr.com>]

Try either watching which axis the errors are occuring
on.  Better yet is to hook up a computer and record the
errors.  Chart with the autoguider plugged into the
mount and not plugged in.  Then try adjusting the 
exposure times and hysteresis settings to see how well
things improve.

At such a short FL .5X may not be fast enough for 
correction speed.  Try 1X.

Gene Horr
genehorr@houston.rr.com

-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of Alan Voetsch
Sent: Tuesday, May 20, 2003 12:53 PM
To: APML; Group Losmandy
Subject: [APML] Guiding a TV-85 on a GM-8 with an ST-4


Hi all,

Sorry for the double post but I want to reach as many who use this
combo as possible.

I was able to setup my scope, mount and get it guiding with an ST-4
last night. The mount and ST-4 are new to me so I was rather amazed.
They appear to work well together. The ST-4 is on a 70mm f/10
guidescope. What I'd like to get is feedback on optimising the ST-4s
settings for this setup. I am using it as a standalone guider. I
believe I had the tracking rate on the GM-8 set at 0.5X, any other
suggestions?

Most readings were: -1, 0, 1, 2s, -2s with an occaisonal 5, 6, and even
a 9 thrown in once. 3 times during the 1 hour test, the ST-4 beeped a
time or two, gave brightness and location readouts, then continued
guiding. Any comments?

Thanks, 
Alan

P.S. If any of you also use the ST-4 on say a 12" LX200, I could also
use some suggestions on settings for that scope. That will be through
an off-axis guider.

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