I use a QHY8L with SGP and have done for quite a while and the camera works perfectly with SGP, I have noticed no strange behaviour with ref to cooling and I don’t think I have ever experienced a disconnection while hooked up to SGP.
One thing I will say is that when you first turn on cooling in the SGP interface the camera wants to whack cooling power up to 50%, the power % in the cooling module will start at 1% and progressively rise up until it hits 50% before full control is gained. This is built into the drivers and not a fault with SGP though. I have the older single TEC version whereas the current one is a dual TEC version. I usually operate at approx. 20-25c below ambient and once the temp is stable there the power usually hovers around 27% so you can understand why I get a little nervous with it’s wanting to shoot to 50% power what with the possibilities of thermal shock & all.
This only happens once on initial connection and cooling turned on though. To counteract this situation, before turning on cooling, I note the sensor temp shown in the Cooling module, add a couple of degrees and place this figure in the ‘Set To’ box and set the time to 2 mins. On clicking cooling to ‘ON’ I immediately click the ‘Set’ button, This starts a Warming cycle and the power % doesn’t usually pass 10-15% before SGP is bringing the power back down again. once the power is back to 1% everything will operate perfectly. I will then begin the actual cooling cycle when I am good & ready.
I’m using the camera with an F4 newt so it is quite a wide field of view, my pixel scale is approx. 1.58 and even though I am relatively new to all this and also trying to solve an issue with my flats, I managed a test session:-
(IC63) - The Grim Reaper region
I’m quite chuffed with the test result, the exposure time for the subs was only 1 min 30 seconds and it should have been at least 3 mins per frame but time constraints dictated the lower sub time. x30 subs were captured in this session. The worst defect being the rather nasty reflection near the Reaper himself as a result of the very bright star. This image was outputted from Pixinsight (I’m very new to Pixinsight) at about 50% resolution and as a .JPG which is never optimum format for quality but then again, it was only a test.
If you click the attached image and click it again when the box opens up then that will be the full size of my image, bare in mind though that the full size of ‘THIS’ image is only 50% size of my original Fits which the camera put out.
Hope this helps