Hi,
I've been trying to build dark libraries for my QHY247c and 178c. The 247 worked flawlessly but the 178 will not expose dark frames. Live view works as well as snapshot and framing shot so it is not a communication or PC issue (I think).
All settings mirror what was working for the 247.
SC 4.0
Latest QHY drivers ,SDK
WIn 10
Any thoughts?
Brian
QHY178c won't capture dark frames
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Re: QHY178c won't capture dark frames
Hi Brian,
there are no obvious errors in the log related to the QHY camera ( a few failed to connect to ASCOM hardware, but that shouldn't matter).
I presume from your description that the camera is detected but is not sending image frames to the PC - that is often a sign of USB communications issues, so it may be worth trying different cables (remove any extensions/hubs) and to increase the 'USB Traffic' control setting (on QHY cameras, increasing USB traffic actually slows down the communication and tends to make it more stable).
That seems the most likely possibility - I have the non-cooled version of the 178 and the cooled version of the (quite similar) 174 and both seem to work fine for me, so I think the cooled 178 should be OK with a good connection.
cheers,
Robin
there are no obvious errors in the log related to the QHY camera ( a few failed to connect to ASCOM hardware, but that shouldn't matter).
I presume from your description that the camera is detected but is not sending image frames to the PC - that is often a sign of USB communications issues, so it may be worth trying different cables (remove any extensions/hubs) and to increase the 'USB Traffic' control setting (on QHY cameras, increasing USB traffic actually slows down the communication and tends to make it more stable).
That seems the most likely possibility - I have the non-cooled version of the 178 and the cooled version of the (quite similar) 174 and both seem to work fine for me, so I think the cooled 178 should be OK with a good connection.
cheers,
Robin
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brushpilot
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Re: QHY178c won't capture dark frames
Hi Robin,
I tried a different cable to no avail but was expecting none as the camera was still working just fine in Live View and still modes.
Reducing USB speed made no difference either and there are no hubs.
What solved the issue was going from 32 bit to 64 bit 4.0
I've no idea why that should make the difference as I've used the camera before in 32 bit mode just no dark frames. I'll take the win though and I should have tried that before bothering you.
One little bug (that may be a feature?) is when I disconnect a camera, if I unplug the USB connection to switch to another camera, SharpCap quits instantly. Not a biggie...
Brian
I tried a different cable to no avail but was expecting none as the camera was still working just fine in Live View and still modes.
Reducing USB speed made no difference either and there are no hubs.
What solved the issue was going from 32 bit to 64 bit 4.0
I've no idea why that should make the difference as I've used the camera before in 32 bit mode just no dark frames. I'll take the win though and I should have tried that before bothering you.
One little bug (that may be a feature?) is when I disconnect a camera, if I unplug the USB connection to switch to another camera, SharpCap quits instantly. Not a biggie...
Brian
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admin
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Re: QHY178c won't capture dark frames
Hi Brian,
well done for finding the 64bit version fixed things - that isn't something I would have expected at all. I'd have to suspect that it is actually the 64 bit version of the QHY SDK that is the fix here as almost everything is identical in the 32 vs 64 bit versions of the SharpCap code apart from limits on memory allocation.
If it's crashing instantly with no bug report opportunity then it is probably again a crash inside the SDK - there are certain types of runtime problems that cause an application to 'fail fast' - ie die straight away without the opportunity to deal with the issue. If that's happening then there might be more info in the Windows 'Application' event log. If I'm right about it being the QHY SDK then the event log data would mention 'QHYCCD.dll'
cheers,
Robin
well done for finding the 64bit version fixed things - that isn't something I would have expected at all. I'd have to suspect that it is actually the 64 bit version of the QHY SDK that is the fix here as almost everything is identical in the 32 vs 64 bit versions of the SharpCap code apart from limits on memory allocation.
If it's crashing instantly with no bug report opportunity then it is probably again a crash inside the SDK - there are certain types of runtime problems that cause an application to 'fail fast' - ie die straight away without the opportunity to deal with the issue. If that's happening then there might be more info in the Windows 'Application' event log. If I'm right about it being the QHY SDK then the event log data would mention 'QHYCCD.dll'
cheers,
Robin