Re: [APML] OT: St-4 -help!

[Éder Iván <eder@prof.hu>]

Radek,

>you said it aplays increase time to second corection aswell, so I presume 
>you mean on the both directions in Dec. Is it really wrong ?

No. I mean st-4 applies the increased time first, when change the direction.
AND for the next cycle (correction) again, which is taken to the same 
direction. In other words, st-4 applies the increased time (immediately) 
twice, not only for one time.
After direction changing (long correction), normally, st-4 ought to make 
very short (normal) corrections again, I think.

Sorry for the bad English, I hope it is clear now.

At 15:40 2005. 09. 19.t Conve, you wrote:
>Ivan, forget my last reply, it has to be some problem there when it does 
>not guide properly.

Sorry. What do you mean? Problem with the st-4, or the mount?

>BTW I saw your telescope on your web page and it looks really nice.

Thanks!

Ivan

>  I think it has to aply same correctin time for both directions in Dec.
>
>Radek
>
>
>-------Original Message-------
>
>From: <mailto:astro-photo@seds.org>Discussion of Film Astrophotography
>Date: 09/19/05 14:25:00
>To: <mailto:astro-photo@seds.org>Discussion of Film Astrophotography
>Subject: Re: [APML] OT: St-4 -help!
>
>Radek,
>
>Thanks for the tips.
>Yes, I know the problems coming from the gearbox. I'm planning to buy a
>SkyScan upgrade, but still I'm waiting for an upgradeable (via internet)
>version.
>I absolutely know how my mount works, since I guide it manually for 2
>years. It has the same rough (and big +/-20") periodic error, and huge
>backlash (about 1.7 sec). I tried to set backlash (H2 parameter) to
>different values, but the problem does not disappeared. While st-4 worked,
>I simultaneously watched the guide star through the main optics, so there
>were no backlash overcompensating, or similar setting problem. The st-4
>every time (after direction changing) applied the increased time to the
>second corrections also, I don't know why.
>Maybe the SkyScan upgrade will solve the problem, and i will not need
>backlash compensation anymore.
>
>Thanks again,
>Ivan
>
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