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  #21  
Old 05-11-2015, 01:23 AM
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billdan (Bill)
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Hi Aidan,

So sorry to read you are still having problems with the camera.

Why don't you take the camera and TEC home with you and run EZcap at home for a week (create a dark library for different exposure times) and see if you can replicate the problem.

If so, contact QHY and raise a service ticket, and let them log onto your home PC and see if they can solve the problem. They can upgrade the firmware from remote if its out of date.

EDIT: I recently got my 3 year old QHY12 back from them and they replaced the complete main board for $65 + $45 air freight, apparently the tracks on the old main board were corroded.


Regards
Bill

Last edited by billdan; 05-11-2015 at 01:31 AM. Reason: more info
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  #22  
Old 05-11-2015, 06:42 AM
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PRejto (Peter)
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Perhaps the "need to uplug" USB is due to a grounding difference between the USB on the mount (or close to mount) and the USB ports on the computer. Just a guess, really. I don't have a QHY camera but I had some problems with an SX camera that sound rather similar and maddenly random. I too was using a long extender cable. I finally ditched the extenders and inexpensive hub and replaced with the Icron Ranger 2204. All my USB problems were completely resolved. One thing I learned is that dfferent hubs, including the MKS built in hub can cause different sorts of issues with different equipment. For example my Moravian G2-8300 camera will not run through a Digiport powered hub up on the mount running into the Icron at the mount base (all other gear runs fine in that configuration), but the Moravia runs perfectly plugged into the MKS hub and then into the Icron. The only difference is the two hubs.

I do hope you get it sorted. It does sound like there is something unusual with the QHY USB though I wonder if you could possibly have more than one issue going on due to the long cables. Regardless of the QHY issue I think you are asking for problems by persisting with over long USB cables. The Icron is expensive but not compared to the $$$ already spent.

Peter
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  #23  
Old 05-11-2015, 10:45 AM
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Somnium (Aidan)
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Quote:
Originally Posted by billdan View Post
Hi Aidan,

So sorry to read you are still having problems with the camera.

Why don't you take the camera and TEC home with you and run EZcap at home for a week (create a dark library for different exposure times) and see if you can replicate the problem.

If so, contact QHY and raise a service ticket, and let them log onto your home PC and see if they can solve the problem. They can upgrade the firmware from remote if its out of date.

EDIT: I recently got my 3 year old QHY12 back from them and they replaced the complete main board for $65 + $45 air freight, apparently the tracks on the old main board were corroded.


Regards
Bill
Hi Bill, i took the camera home and ran it off 2 different computers for that past 2 weeks, i will contact QHY and see what they can do, but i am starting to think this is just a limitation of the camera, it doesnt seem to like swapping between camera control software. i would love to know if anyone has the same camera permanently connected to a computer while using either TSX or astrotortilla. perhaps it just isnt designed to be operated remotely and perm connected.

Quote:
Originally Posted by PRejto View Post
Perhaps the "need to uplug" USB is due to a grounding difference between the USB on the mount (or close to mount) and the USB ports on the computer. Just a guess, really. I don't have a QHY camera but I had some problems with an SX camera that sound rather similar and maddenly random. I too was using a long extender cable. I finally ditched the extenders and inexpensive hub and replaced with the Icron Ranger 2204. All my USB problems were completely resolved. One thing I learned is that dfferent hubs, including the MKS built in hub can cause different sorts of issues with different equipment. For example my Moravian G2-8300 camera will not run through a Digiport powered hub up on the mount running into the Icron at the mount base (all other gear runs fine in that configuration), but the Moravia runs perfectly plugged into the MKS hub and then into the Icron. The only difference is the two hubs.

I do hope you get it sorted. It does sound like there is something unusual with the QHY USB though I wonder if you could possibly have more than one issue going on due to the long cables. Regardless of the QHY issue I think you are asking for problems by persisting with over long USB cables. The Icron is expensive but not compared to the $$$ already spent.

Peter
thanks for the info Peter, i tried to eliminate all variables as a part of the testing and as such i used multiple cables and set ups. in it's current configuration it is sitting on my desk at home with a short cable directly connected to the computer, i dont think it is a cable related issue. i am thinking that there is something to do with the fact that the camera operates under 2 types of power, USB and 12v, it seems that both need to be cycled at the same time to reboot the camera. for some reason restarting the computer might not fully cycle the USB power ... that is the only thing i can think of ... frustrating.
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  #24  
Old 06-11-2015, 10:13 AM
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billdan (Bill)
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I had a hunt around various forums yesterday (QHYCCD, SGL, CN and Astronomy Shed) to see if anyone was experiencing similar issues to yourself but I came up empty handed.

I know in the QHY12 manual it wants the 12V TEC power to be inserted after the cables are plugged in , and removed first on switch off. I'm not sure how important this is. But it could be a timing issue with power sequencing.

Bill
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  #25  
Old 06-11-2015, 10:27 AM
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Somnium (Aidan)
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Quote:
Originally Posted by billdan View Post
I had a hunt around various forums yesterday (QHYCCD, SGL, CN and Astronomy Shed) to see if anyone was experiencing similar issues to yourself but I came up empty handed.

I know in the QHY12 manual it wants the 12V TEC power to be inserted after the cables are plugged in , and removed first on switch off. I'm not sure how important this is. But it could be a timing issue with power sequencing.

Bill
i am just special i guess ... i have stuck to the power up process that QHY recommends. i have run out of trouble shooting techniques, i might just have to deal with it.
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  #26  
Old 06-11-2015, 03:05 PM
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PRejto (Peter)
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As a last ditch effort could you build remote switch into which you plug the USB from the camera? Perhaps you could just interrupt the 5 volt supply in the USB cable. That ought to be the same as unplugging the camera. Not sure how one might do this but I bet it's been done by someone. Both of my cameras occassionally need to be USB unplugged to restore function (though not since I switched over to the Icron 2204). Thinking about operating remotely I've wondered if I could build such a device.

One thing I've thought of trying is to run the camera into a powered hub. Perhaps powering off the hub with have the same effect as unplugging the camera given that generally powered hubs do not function when unpowered. Powering off the hub would be a lot easier to control remotely than interrupting the USB power directly.

Peter

Here is a bit of a discussion on the subject:

http://electronics.stackexchange.com...disconnect-usb

http://electronics.stackexchange.com...e-disconnected

https://www.quora.com/When-I-disconn...cal-connection

This might have the most interesting info:

http://stackoverflow.com/questions/1...ary-usb-device

Last edited by PRejto; 06-11-2015 at 03:43 PM.
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