Quote:
Originally Posted by whzzz28
Hi DJ N,
Do you run any dew control on your scope?
My graphs on my HEQ5 look similar when the guidescope starts to dew up. Like you my main image looks fine, but the graph doesn't look so great. If it dews up real bad, eventually PHD loses the star.
Does it guide like this from the start or takes a few mins before it gets to this stage?
Also have you setup a PEC profile?
Your DEC is up and down in a sort of pattern, so a PEC profile may help you (or not). There is a nice tool that will take a PHD log file and display some graphs for PEC training, which should help you determine if it is periodic error or something else.
Conveniantly, i can not remeber its name or where i got it from. I believe there is a link on Stark-labs website somewhere.
The only other thing i can think of is that maybe your mount is not levelled, but im guessing you have made sure it is as level as you can get it.
Finally, you can always try drift aligning altitude as well, won't hurt to check.
-edit-
I learn't to read, removed my stuff up.
-edit 2-
Found a month old image of PHD i took, this was with a QHY5 on an Orion ST80 guidescope. Possibly try the settings i used (RA hys/agr) and max DEC
http://core-au.net/astro/phd.png
(disregard terrible stars, thats not a tracking problem, main scope had a "problem") |
Hi,
Appreciate the feedback. Basically guiding is like this from the start. I do run dewheating, so this is not an issue. I will however investigate PEC training, as up until now, never used it.
Quote:
Originally Posted by troypiggo
I recently wondered something similar. First, quick question. How come you're using PHD for guiding when you have Maxim already?
In my case, turned out to be poor seeing combined with too short exposures on guide cam. I lengthened the guide cam exposures to 5 secs to average out the seeing a bit more and that made big improvement. Also set a delay after exposure of 1 sec to ave out seeing effects, and tweaked "min move" to better suit my imaging and guiding gear.
Good link on tweaking guiding settings: http://www.ccdware.com/resources/autoguidercalcv4.cfm |
Thanks for the link, I will have a read through. I have started playing around with the guiding function on Maxim last week, and it does work, so no excuses
. I suppose just to see where I was with regards to the mount rebuild, I decided to use PHD simply as I am more familiar with it.