1805Re: [ccd-newastro] Dec drift while guiding with a LX-200
- Apr 1, 2001Good Morning Alan:
Can you please describe this relay switch in a bit more detail. Is it
specific to the LX-200? Do you have information on how it can be obtained,
if applicable to scopes other than the LX-200?
From: "al brockman" <alanb@...>
> I have been very encouraged in my persuit of better tracking with thetried
> LX200 mount by use of a relay switch developed by Wesley Erickson. I
> it out for the first time two nights ago with my ST-8 and what it does isof
> deceptively simple but now allows the guide chip to track in both RA and
> DEC without problems caused by DEC backlash - ala' the Death Wobbles'. It
> switches off a north or south direction so that Dec movements occur in one
> direction only to correct for the inevitable DEC drift. Over a combined 60
> minute exposure, the guide star never left the window and stayed centred.
> Normally I must switch off Dec corrections and see a slow drift over time
> that I can never quite tweak out by Drift aligning. There were occasions
> overshoot but I think I can improve that by changing the aggressive
> setting. Is there a better way to adjust this?
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