Dear Warpastron firends,
My search for a sturdy reliable but portable mount for my 10" Newton brought me to the wd-20 which I got this week for comparing it against the Skywatcher 150i.
Sadly I didnt get good results yet - hopefully someone here had similar results and can provide me some hints
Here my events from yesterdays evening:
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updating the mounts UTC time via GPS takes super long (especially when the 10" Carbon Fiber Tube sits on it - graphite is not good for receiving signals I guess…), so I ended up in taking time and location from Kstars. but I guess there is nothing wrong with it.
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polar alignment and the mechanics work quite well. But for the very last precision I need to have (both on ALT and AZ) locks closed and only fine tune with the knobs. Is that okay? Because if I tighten down the locks after I reached good precision, the PA will shift a bit.
2a) on the topic of PA: I used to slew east for 30° (3 default 3 point alignment) and finished my adjustments there. After that I did another PA from the same position slewing the same amount West - ending up at the initial park position. Every time I did that, a new PA alignment error will come up (50" to 1’ around). not sure if this is to be expected.
2b) Question: do you also just PA towards to celestial pole or do you make another plate solve based pole alignment around the target you want to image?
- but now to the real problem, Guiding. I played around for 2 hours and stopped in the end.
I could get the mount to guide properly. Initially I tried the same settings of my last session with the Skywatcher 150i wave mount where I usually get .4 - .6 max total RMS through the night. (1000mm focal length, OAG, F4)
After the PA did GoTo the target of my last nights for better comparison (M81 - really high up currently) did a plate solve feeding the alignment tool with one image from the last session.
That all worked - the framing looked 1:1 the same as a week before - so goto & alignment works.
Next I started the guide module. After it did its initial Calibration which looked quite normal, the guiding started. Here are some screenshots.
I tried all sorts for guide exp. times. from 1 second up to 3 and also various aggressiveness and max pulse settings. nothing really changed.
The Guide Hits / Dots are all over the place but also building a “nice” horizontal disk like formation on the bullseye on the right bottom over time.
You can beautifully see the periodic error going up and down and with it the guide pulses (the transparent blocks behind the RMS graph).
So I guess the guide module tries with maximum pulses to correct on DEC side but with no effect, or so ?
I have no idea whats going on but for me it looks like I was “guiding” / tracking bare metal - like from a perspective of the Software guide pulses are sent to the mount, but nothing gets executed ?
I have no clue.
I hope you can help me out with some hints towards INDI integration, Stellarmate / Kstars and can share some experience?
Today is another clear evening. I would give it another shot.
thanks a lot.
Andreas