The command set is documented in the SX wheel manual (www.sxccd.com/wp-content/uploads/2020/11...ard-Filter-Wheel.pdf), but it only has commands to get number of filters, get current filter and selecting new filter with no option for one-way motion.

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Jarno Paananen replied to the topic 'Flat Panels Question' in the forum. 4 months ago

I use Gemini SnapCap with flat light in my remote observatory, though I'm not sure if it's any cheaper than those options.

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As said in some other thread, having just a little bit loose power connector which is quite typical to HEQ5 and others causes this sort of serial errors too so that is also something to test. And making sure the voltage the mount receives it high enough, more than 12V seems to work better, I ran mine at 13.8V.

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Good to hear that helped, yes the regular barrel connector is not a very good choice for powering a device that is constantly moving. Also there seems to be some tolerances that some cables fit better than others and thus might work better. Skywatcher has better connectors in some of the higher end mounts like EQ8, but I guess there is a cent or two to be saved by not using those in the cheaper models...

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Yes, 3.5.7 should be out pretty soon.

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Yes, thought the limits set to the controller would prevent that, but it doesn't seem to quite work... Unfortunately my USB_FocusV3 controller stopped working a bit over year ago so can't test that anymore. It would show up normally, but just didn't respond to any commands anymore.

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JPL changed the APIs for retrieving the orbital elements sometime around 3.5.6 was released and fixes are in GIT, to be released with 3.5.7. More info in merge requests invent.kde.org/education/kstars/-/merge_requests/452 and invent.kde.org/education/kstars/-/merge_requests/468

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If I remember correctly from working on the driver was that the controller handles step count as 16-bit value so the maximum step count is 65535 and then it would wrap to 0. Unfortunately there is no command to sync/set the step count to a lower value like many other controllers have so the only way to lower it is to run the focuser in a bit (to maybe 50000 or so) and then move the focuser out manually to the focus point so that the values when searching for focus are lower.

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I use EQMod align. Those erratic jumps sound a lot like what I had with my previous HEQ5 mount which had a bit loose power connector and that manifested itself as occasional serial port errors. I ended up changing the power connector to a screwed one and that cured those issues. If you enable logging for EQMod, does it report any serial errors? Or does the power led blink / fade or is it stable?

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