## QHY183c TEC problems with Sharpcap 3.2

GregL
Posts: 60
Joined: Sun Apr 30, 2017 6:19 pm

### QHY183c TEC problems with Sharpcap 3.2

I just got my QHY183c back from the vendor and wanted to comment that the 'auto' temperature control does not seem to work. I can adjust the power manually in the window to get approximately the amount of cooling I want. But if I enable 'auto' , the temperature setpoint is ignored and cooling power maximized. I have to feel that this is very hard on the TEC. It seems to default to this behavior as when I connect the camera the cooler is slammed into maximum. At the very minimum, it seems the default behavior should be 'off' or something sophisticated like in Sequence Generator Pro with a cooldown rate setting.

Thanks,

greg latiak

Posts: 4482
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

### Re: QHY183c TEC problems with Sharpcap 3.2

Hi,

this seems to be a bug with the 183C camera and the current version of the QHY SDK that SharpCap uses – there's been another report on here in the last couple of days exactly the same problem. I really am hoping for a new version of the QHY SDK that will resolve this sort of issue in the near future.

I think the fact that the cooler starting at maximum power is just because SharpCap by default restores the previous settings for the camera the last time you used it, so if the previous setting was in auto mode then that will be restored the next time you start the camera. If you close down the camera with it set in manual mode at say 30% power then it ought to restore the next time with those settings. Please let me know if this is not the case.

Cheers, Robin

GregL
Posts: 60
Joined: Sun Apr 30, 2017 6:19 pm

### Re: QHY183c TEC problems with Sharpcap 3.2

Its funny because it doesn't behave that way with either SGP or their own Ezcap. I have been using it on manual and typically it is around 10% power when shut down. So no, when reconnecting its back to full throttle... be nice if it just went back to the way I left it.

BTW... with the unending stream of cloudy weather we have been having I feel lucky to get one or two acceptable nights a month. Grumble.

Thanks much, Robin. Hope you are feeling better.

greg

Posts: 4482
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

### Re: QHY183c TEC problems with Sharpcap 3.2

hi Greg,

I've just looked at the latest version of EZCap and it seems to be using a newer version of the qhyccd.dll than the one published by QHY in their SDK download that SharpCap uses. It might be worth trying copying that DLL from the EZCap install folder Over the one in the SharpCap folder and see if that helps.

Cheers, Robin

turfpit
Posts: 1214
Joined: Mon Feb 13, 2017 8:13 pm
Location: UK
Contact:

### Re: QHY183c TEC problems with Sharpcap 3.2

Greg

Suggest you rename the existing SharpCap qhyccd.dll to say qhyccd-old.dll first, then copy in the new version. That way you have a regression path if the new one does not work. SharpCap must be closed before carrying out the rename/copy.

Dave

GregL
Posts: 60
Joined: Sun Apr 30, 2017 6:19 pm

### Re: QHY183c TEC problems with Sharpcap 3.2

In the install that is on my machine, the qhyccd.dll is version 18.5.2 in both locations -- the QHYCCD directory tree and Sharpcap. Also, Sequence Generator Pro connects to the QHY183c and operates the camera TEC correctly. One difference, though, is SGP connects through the ascom interface, not direct.

greg

Posts: 4482
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

### Re: QHY183c TEC problems with Sharpcap 3.2

Hi Greg,

I installed EZCap last week and ended up with DLL version 19.1.3. You will also find the version of the DLL that Ascom uses somewhere like

Code: Select all

C:\Program Files (x86)\Common Files\ASCOM\Camera

Try copying that version into the SharpCap folder and see if that makes any difference. If that version doesn't work in SharpCap (or it's the same version yet again) then it would look rather like I've got some code that doesn't handle the 183C cooler very well in SharpCap and I will have to ask QHY for advice as I don't have that model to test with.

Cheers, Robin

GregL
Posts: 60
Joined: Sun Apr 30, 2017 6:19 pm

### Re: QHY183c TEC problems with Sharpcap 3.2

Robin,

I will troll their site again, but that is not the version I get. Now I do install the x64 versions because I am running a 64 bit OS.

greg

SteveInNZ
Posts: 50
Joined: Tue Feb 14, 2017 6:56 pm

### Re: QHY183c TEC problems with Sharpcap 3.2

Robin,
I don't have my laptop with me to check versions etc, but I had the same trouble (worked manually but not on auto) with my QHY174 the other night. I know we have the same model so you might want to try your camera just to check.

Steve.

Posts: 4482
Joined: Sat Feb 11, 2017 3:52 pm
Location: Vale of the White Horse, UK
Contact:

### Re: QHY183c TEC problems with Sharpcap 3.2

Hi Greg, install the 32 bit version because Sharpcap is a 32 bit application.