View Single Post
  #13  
Old 06-12-2011, 12:22 AM
gregbradley's Avatar
gregbradley
Registered User

gregbradley is offline
 
Join Date: Feb 2006
Location: Sydney
Posts: 18,183
I might just swap over the camera to the ML8300. I wanted to see how that imaged anyway with the AP.

Its cloudy now.

Depending if I entered the correct image scale (well its correct for 4x4 binning) it appears PE is around 3.5 arc secs. I tried to attach the file but error message came up invalid.

I can email it to you.

The east/west button leaves the curve as it is or inverts it depending on which one you use. I had it back to front on my PME for a few months and found also the PEC only worsened or did nothing. Getting east/west right made it improve tracking noticeably and gave round stars more reliably.

If tomorrow night is clear I can tell you if PEC improved guiding or not for my mount.

I got quite round stars last night without a T-point model and using a CCD drift alignment and no PEC. I did a short t-point model tonight and it T-point has PA adjustments. So tomorrow night I can do that, do another t-point model and get it closer plus use the PEC.

The resulting PEC curve looks similar to my PME one except a bit wider in amplitude.

It did seem to me that the curve inverted after it was fitted and loaded to the mount. I wonder if something odd is happening there? Perhaps that is usual as the inverse of the recorded error curve is the correction needed.

Greg,



Quote:
Originally Posted by cventer View Post
Strange Greg. Maybe is the chip too big. I used QHY10 which is reasonably large chip and image link works every time.

I did mess with some parameters in the solve settings. I will check tomorrow what mine are set to.

I find if you have a model or at least a sync first it works best as mount knows its close to object its solving.

You have to manualy enter the image scale into TCS within skyX for PEC

I still have not got my PEC to actualy work. It either makes it worse or does nothing. keen to see your CCDsoft log files from your mount.

I have tried so many combinations now with west of mount box ticked or not ticked. Just seems like PEC sends wrong commands to mount our they are out of phase some how.

Im hoping its a southern hemisphere bug. I have all my logs but no time to send to bisque borthers yet.

Mind you mounts tracks very smoothly without it so it seems to guide out reasonable easily.
Reply With Quote