Astrophotography forum > Mounts Questions & Expirience

PEC Recording with a CGX mount.

(1/4) > >>

Chaudhari Evans:
I am using a CGX-L which I guidewith PHDusing Celestrons ASCM drivers. As you probably know it is controlled through the hand controller via USB.

Now I 'used' to use EQmod which I had a fairly good handle on how to record perodic error using that. But with this new to me setup I was wondering if there was and 'good' way to automate the data collection.

Or is the old manual guide while recording for 6 minutes or so still the best?

What about the huge ring gear on the CGX-L is 6 minutes enough?

Thanks in advance

David Felkel:
Interesting that you ask. I too am beginning to look at this.
I will be using PemPro (version III - Beta required). All is set up and ready. Probably tomorrow night.
PemPro, and the Celestron ASCOM driver for it, seem to want to say that the WormCycle Period is 478.69 seconds, which seem long to me. That would be 7.9782 minutes. I guess i will see what happens when i connect it all together and initialize the process.

I would be curious.... Has anyone actually verified the worm cycle period of the CGX-L ??
I have been searching and searching, but cannot seem to locate a reference, other that the screen information as outlined above. That would be verified during initialization, hopefully tomorrow evening.... (unless i try it tomorrow morning just to see if i can read it....). Now... why wait ?? Because i cannot take the computer out to the observatory when the temp is over about 95 degrees (ambient), and right now, it is over 100..... (It is a MAC BOOK PRO).

olaralal:
There was a recent thread on using the PECTool with cgx-L - and my main point about it with all celestron mounts including this one is that you may need to guide through the st4 port while you do the training.

In this day and age I really don't think anyone needs to resort to manual guide corrections - for any reason. And it won't be as accurate as guiding.

It's not clear if either of you intend to record with the PECTool - but if you have a way to connect to the st4 port for guiding, then the PECTool is free and effective at recording a number of worm periods, averaging them, and loading them into the mount.

I don't think there is a way to use the PECTool and guide with the ascom driver. But there are ascom drivers for cameras and other devices that connect to the st4 port. So ascom is still possible to use in that sense - but you can't use the actual celestron ascom driver and its pulseguide commands to guide while recording with the pectool.

I hope that makes sense...

Frank

vidysriret:

--- Quote ---I am using a CGX-L which I guidewith PHDusing Celestrons ASCM drivers. As you probably know it is controlled through the hand controller via USB.

Now I 'used' to use EQmod which I had a fairly good handle on how to record perodic error using that. But with this new to me setup I was wondering if there was and 'good' way to automate the data collection.

Or is the old manual guide while recording for 6 minutes or so still the best?

What about the huge ring gear on the CGX-L is 6 minutes enough?

Thanks in advance


--- End quote ---

No, the old manual guiding is less reliable and precise than using your guide camera. As for "how long"? the period of your worm. Please see the manual under PEC recording.

As for how, you can just record one revolution of the worm using the routine in the HC, or you can record/average several using software like Pempro or Celestron's freebie Pectool.

What I'd do is just record one cycle with the HC and see if that improves things enough for you.

carmiphypart:

--- Quote ---
--- End quote ---
Well the manual that comes with the CGX and the XLunder PEC states to see the supplement on astro imaging. The supplement is not included.

You have to refer back to the CGE manual which does have the supplement but off course does not have the worm period for the GGX or XL for that matter.

I will look into this PECtool. If I understand correctly you have to get ST4 guiding working first. Right now I am using pulse guiding. Never even tried ST4 with this mount.

But good advice on trying a 'manual' run once and see if it changes anything.

Right now I have been tinkering with the gear mesh and balance on the RA however weather keeps holding me back. As usual. Once I get that narrowed down I will start on PEC.

Thanks for the input so far

Navigation

[0] Message Index

[#] Next page

Go to full version