Belt drive on both (and I can confirm that as I removed the cowl that covers teh belt and motor system today to ensure that it was there and in good working order).
Had a really long session with the mount last night, gave it a few hours of guiding in what were reasonable skies compared to the thick cloud of the last few days.
I'm guiding internally to EKOS, not PHD2 (yet) so feeling my way compared the volumes of docs available for PHD2 - last night's session with an 8" SCT and a ED72 guide scope gave me about 0.8arcsecs RMS on RA and 0.4 on DEC which is far better than my first night.
I then moved to the OAG (ASI290mm) and after opening up the window to 128pixels had far more success in finding and keeping the star in frame this time. Got a good 90 minutes of imaging in and saw 0.6 RMS on RA and 0.2 DEC - I'm not sure about everyone else here, but I was pretty pleased - I would even theorise that I was seeing limited last night vs. the mount but I'm not the best judge of these things yet.
Moving swiftly onto the PPEC training problem. Well.....
Initiated the training again through the EKOS control panel, WHILE guiding was running (providing the feedback pulses) and again, shortly after enabling the RA PPEC in EKOS the mount goes into what looks like 50x sidereal tracking speed (from the meridian to the bump stops in 60-90 seconds - terrifying to watch even with horizon limits switched on!)
Not entirely sure how I solve for that problem other than for now, avoiding the "feature" altogether.
If anyone has any experience or thoughts with this feature with ASCOM or going the the SkyWatcher app, I'd love to hear about it.
Quote:
Originally Posted by The_bluester
What is the worm period on the EQ8-R (If that is any different to the older EQ8) You would need to train the PEC for at least a full worm cycle. The EQMOD PEC trains over at least four worm cycles to average out the corrections (Might be 5) And yes, you will need guide commands to the mount to train it.
That said, there would not normally be PEC on the Dec axis, that should only be getting guide pulses to deal with the PA not being quite right or a bit of wind moving the scope off target and similar errors, it does not run continuously at a theoretically fixed rate like the RA, so periodic error is not as important.
|