开云体育

> I encountered the same problem as you report: the Gemini-2 PEC training acquisition time is broken.? The internal
> PEC that is advertisef to work in G-2 does not work. The only way to get a working PEC at this time is by
> purchasing PEMpro, then use a PHD2 unguided log file fed into PEMpro to have it create the correct PEC file.

Michael, you obviously haven't used PEMPro, because you don't feed a PHD2 unguided log file into PEMPro to create a PEC curve. Maybe you are thinking of the PEMPro Log Viewer, which does accept PHD2 logs for analysis?

> I reported the G-2 problem to Renew Goerlich who asked me to download certain files from the G-2, but I did not
> have a CAT5 cable connection so I did not deliver the files requested.? Bottom line: G-2 PEC does not yet work.

You must mean recording PE via an autoguider doesn't work, right? PEMPro does work with the Gemini-2 PEC.

BTW, recording via autoguider is likely to provide inferior results. In fact, this method doesn't work very well at all if there are any non-integer fundamental frequencies, which is not uncommon. I can explain why this is so, if this isn't obvious?

-Ray

> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf Of Michael Herman
> Sent: Thursday, June 17, 2021 8:56 PM
> To: [email protected]
> Subject: Re: [Losmandy_users_io] Changing the servo motor encoders from 256 to 512 or 1024. Any reason not
> to do this?
>
> PCBoreland,
>
> (What is your first name?)
>
> I encountered the same problem as you report: the Gemini-2 PEC training acquisition time is broken.? The internal
> PEC that is advertisef to work in G-2 does not work. The only way to get a working PEC at this time is by
> purchasing PEMpro, then use a PHD2 unguided log file fed into PEMpro to have it create the correct PEC file.
>
> The PEC training in Gemini-1 does work.? You don't need PEMpro if you have a G-1. You can use PEMpro if you
> want of course.
>
> I reported the G-2 problem to Renew Goerlich who asked me to download certain files from the G-2, but I did not
> have a CAT5 cable connection so I did not deliver the files requested.? Bottom line: G-2 PEC does not yet work.
>
> Meanwhile I am happy to read your detailed reports on the 125:1 gearbox.? I agree that PHD2 autoguiding will
> correct the DEC and RA.? It would be the same if tracking the sun or moon or a planet...you must use autoguiding.
>
> And yes. The 125:1 vs 25:1 means that slewing will be somewhere like 5x slower.? Yet it is the tracking perfection
> that you are focussing on.
>
> Best,
> Michael
>
>
>
>
>
> On Thu, Jun 17, 2021, 8:10 PM pcboreland via <pcboreland=[email protected]> wrote:
>
>
>? ? ? ?As was pointed out by David Partridge, it is possible to change out the gear box on just RA if one uses the
> web interface to select the parameters. I installed the 125:1 gearbox earlier in the day, and have been able to
> gather some initial data. As might be expected there is good and bad.
>
>? ? ? ?The Good. Unmoded, my Ra guided on average 30% worse than the Dec axis looking back over 6 months
> of logs. With the limited short run tests done earlier this evening RA is now guiding 10 to 20% better than Dec. A
> huge shift in performance. A seeming improvement of greater than 0.6 arcsec on 10 min runs. I'll be imaging in 90
> minute blocks later tonight so will hopefully get data worth sharing, and this improvement holds
>
>? ? ? ?The Bad. 1. Ra runs slow. Over a 3hr period it fell behind the object a noticable bit. This I assume is
> because the Ra tracking divisor is set to 89754 when it needs to be set 89754.2. I go not think this is a big deal as
> guiding ought to handle this problem. 2. Pec training runs for just 48s. 1/5th of a worm cycle. Not sure how to fix
> this? I do not see any parameters to lengthen the record time. Pec is turned off and I'm using Predictive Pec in
> PHD2, but hoping this can be fixed?
>
>? ? ? ?First Ha image of the Cygnus Wall just came in!
>
>