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I'm running a fairly straight-forward imaging system with a Skywatcher AZEQ6, Explore Scientific 127ED, and a 50mm guide scope. The QHY 163C camera and QHY 5LII mono guide camera are connected through a 12V powered USB hub on the main scope. The hub and mount are each directly connected to a brand new ASUS Windows 10 pro laptop via their own USB cables (EQDIR in the case of the mount). I'm controlling everything with NINA 1.10, the latest build. 12.8 volts of regulated DC power are supplied by an Alinco dm-340 switching power supply. I have been using NINA with this set-up for about 6 months, mostly very happily, getting it to successfully plate solve, focus, and execute sequences on targets. It has been a joy to use until the past week or two.
1. My main imaging camera seems to work properly for between 5 and 10 minutes or so (starts to cool to reach its set-point for imaging, will collect images for plate solving and auto focusing which NINA displays) but then appears to begin a series of random wild temperature and power swings, with temperature readings of 6000C, all of this displayed on the NINA camera panel. It stops delivering images either from a sequence or from a snapshot command. The camera appears to be maintaining its connection to the laptop via USB, but according to NINA, is seriously misbehaving.
2. PHD stalls out. The program opens initially on cue from NINA, connects the camera, picks a guide star, and loops patiently waiting for the command from NINA to start guiding, but at the same time the imaging camera goes nuts, PHD stops responding. The image loop stops and freezes and is unresponsive, or upon hitting the stop button, stalls out saying "Waiting for devices...".
In trying to address this, I have updated the camera drivers; changed out the EQDIR and main USB2 cable from the hub; changed the power cable to the imaging camera. I've tried most things I could think of but problem persists. This is additionally perplexing because I have no idea what might cause this stuff to happen, whether it is one problem or several working in tandem.
I must admit I'm confused about the driver situation. I was aware NINA had built-in support for some devices but wasn't sure how the software sorted out who would be controlling those devices: if NINA did it independently with its built-in support, or if NINA routed commands through downloaded QHY ASCOM-compliant drivers. Is there a "best practice" with respect to the use of downloaded proprietary drivers that I should observe? My current practice is to assume they are needed, dump them into my system, and cross my fingers in hopes that they work. Not very smart, I know.
First, if you're selecting the "QHY163C" camera under the QHYCCD category in the camera selection drop-down, you are accessing the camera via the native driver, not the ASCOM driver. The ASCOM drivers are listed near the bottom under the ASCOM category.
Second, the temperature going awry and PHD2 dropping out because (presumably) your guide camera dropped out is likely because of systemic USB issues. Unpowered USB hub, an iffy port on your computer, cables too long or of low quality that could contribute to these kind of drop-outs. I also suggest ensuring that you've updated to the latest driver package that is available on QHY's downloads page. Recent versions introduce some improved USB error recovery.
To Dghent, thanks for responding and addressing the question of how NINA manages drivers. I had set this in the equipment profile, and have not looked at that profile in a while. Whenever the possibility exists to "set it and forget it", I bias heavily towards the "forget it" part. :-) And by all means, I'll check with the discord next time if the problem involves NINA.
I had this issue with QHY drivers way back that is why I intend to avoid QHY, however if you download the 1.5.11(I think) it is the first 1.5x driver from qhy and all my issues disappeared..No hardware change whatsoever.
QHY has incorporated a lot of low-level USB error recovery code into the recent releases of their camera SDK, which is in turn used by their ASCOM driver as well as apps which implement their own native drivers for QHY cameras. Cheap USB cables with 28 AWG data line conductors and unpowered USB hubs will still conspire to derail people and often do no matter who the camera vendor is. But given decent-tier cables and hubs, QHY cameras are as reliable as anyone else's these days.
ZWO has the best drivers and most stable. I use the same hardware and ZWO will never fail me. QHY drivers are a mess. The QHY174MM Cooled that I have only download 4MB of file while ZWO1600MM is 16MB let alone I have 3 of them active on the same cable and it still downloads fine.
IDK man, I have a bunch of QHY and ZWO cameras of different types and generations and my QHY cameras run just as well as my ZWO ones... and I tend to run all of these cameras across 3 different compute environments (desktop, laptop, mini-PC) and USB configurations, so it's not just one "blessed" system that could be biasing my results with a rosy picture. Your assertion might be based on dated software or a problematic USB setup of some sort, which isn't hard to end up with given the wildly varying quality of cables and hubs out there.
Can you describe your setup a little more detail and the problem you're running into? Have you updated your QHY drivers (USB system driver, ASCOM driver, etc) using the new all-in-one driver installation package that QHY now provides, which ensures you're getting the latest of all the critical components?
Update: I should have mentioned another observation that accompanied the strange temperature readings and connectivity failure: high-pitched beeps from my laptop that only stopped when I disconnected the camera in software, or disconnected it physically. My solution was to simply power down and restart everything, re-acquire the target and resume imaging.
I now think (with some indirect evidence) that the erratic behavior I saw has to do with USB, as some contributors to this thread have suggested. Nothing at all to do with NINA. NINA simply gave me a screen to show me the connectivity issue I was seeing with the camera.
I had a glorious almost failure-free week last week imaging at a remote site with perfect performance from NINA which included completed sequences and successful automated meridian flips. I think it helped that I shortened all my USB 2 cables, by-passed the hub and direct-connected the camera and computer and updated all the camera drivers. I would say that this result by itself is not sufficient evidence that the problem was solved because I still do not know exactly what was causing it.
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