Re: [APML] Astro-Physics Field Flatner

[steve banbury <banburys@sonic.net>]

Hi Dan---if your scope/mount isn't perfectly polar aligned, your field 
of view will
tend to drift up or down in declination.  How fast is a function of the 
misalignment.
For reasonably well aligned systems only an occasional adjustment in Dec 
would
be required. 

How fast is your easterly drift?  Could it be your clock (stepper motor 
pulses) are a
little slow?

steve


D Kaestner wrote:

>Ladies & Gents,
>
>I have a real stupid question!
>With an EQ mount does the Dec motor run while tracking?
>Or, is it used just for adjustments.
>Makes sense if polar aligned that RA would be the only one running! Right?
>The reason I ask is that while tracking I'm getting Easterly drift.
>The maker of the mount suggested tearing it down to check gear wear and for
>burrs!
>It's the Orion EQ3 mount. Did a complete tear down and found nothing major
>other then not enough grease on the tapered roller bearings. That and a
>whole lotta slop between drive shaft & gears!!!!!!
>I was running just the mount and noticed that the Dec motor wasn't running
>unless controller buttons were pushed!
>Then was stupid enough to write to Orion about the problem........LOL
>There response was it doesn't run but for adjustments? And now that I think
>about it!   LOL
>Can someone maybe give a reason for the easterly drift??????
>
>
>Thanks
>Dan K.
>
>
>
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