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INDI Library v1.9.9 Released (30 Nov 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

ioptron CEM 40

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Replied by Ron DeBry on topic ioptron CEM 40

Writing that last post felt like venting at the time, but it turns out to have value in laying out all the theories I have read and ideas about maybe what to swap out next.

After running a few hours in the garage with no errors, I mounted the scope and turned everything on just as if I was imaging. Mount errors almost immediately. The main difference? The 12v 10A supply I was using for the cameras and dew heater.

Went and found the 3A supply that came with the QHY183C and swapped it in. So far, no errors. Could this be it? Actually a combination of 'its'. Clearly the iOptron usb cable has issues, but there was also presumably RF noise being generated by the 10A power brick. We'll see. Cloud forecast is iffy for tonight, then nothing looking good for the next week.
11 months 4 weeks ago #80142

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Replied by Kenny Wong on topic ioptron CEM 40

Hi Ron,

Most FT232 USB-to-serial chips support baud rate 9600 only. Too fast may cause trouble to connection.

BR//Kenny
Last edit: 11 months 3 weeks ago by Kenny Wong.
11 months 3 weeks ago #80205

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Replied by Ron DeBry on topic ioptron CEM 40

Hi Kenny,

Thanks for the suggestion. I did try various baud rate settings, including 9600, of course. Never seemed to make a difference. The common standard for recent iOptron mounts is 115200, so the current batch of FTDI interfaces can, presumably, handle the higher baud rate.

I am cautiously optimistic that the combination of a non-iOptron usb type-B cable and removing the 10A power brick has solved my problems, but I'm not declaring victory until I get clear weather and can run a few night's worth of successful imaging.

I had been using the same power brick for a year (mostly while using a CEM25P), but it is entirely possible that it has experienced some sort of change causing it to emit much more noise recently. Indeed, the small batch of subs I was able to collect on the nights with frequent repeated disconnects all look like this:
  

I am really hoping the color banding was caused by RF interference from the 10A power brick, and not by a failure of my camera.
Last edit: 11 months 3 weeks ago by Ron DeBry.
11 months 3 weeks ago #80213
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Replied by Malcolm Whinfield on topic ioptron CEM 40

I am looking at a similar problem, I believe it is the camera or the power supply and usually, it is a matter of grounding (earth loops) that cause this issue. I hope to look at it this weekend experimenting with my power supply.
Malcolm
Telskop Service TS80 480mm APO FL53 Glass
Canon 450D DSLR
ASI120MM Guide camera.
HEQ5 Pro
TIC Focuser NG
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11 months 3 weeks ago #80246

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