Hi guys,
I received my ASI1600MM-cool yesterday and have been trying to capture some bias frames this morning and am having issues very similar to those reported in this thread.
Using frame & focus I seem to be able to capture an unlimited number of frames without a problem with '0 second' subs. As soon as I try to use the sequencer I run into issues.
I'm using ZWO ASCOM driver v1.0.2.7 and SGP 2.5.1.15. Camera is connected directly to the computer via USB 3, with the supplied cable (no hub). I've tried changing the USB limit to 45 and 90, with no effect.
When using 1 second exposures, I can consistently capture the first exposure in the sequence before it fails to download subsequent subs. Using anything less than 1 second has failed to deliver any subs. I get no error messages, nor does the application crash, it just sits there saying "Downloading" in the status bar until I give up.
After failing to download an image using the sequencer, frame & focus is no longer able to download subs. Disconnecting and reconnecting the camera via SGP has no impact. After restarting SGP and connecting the camera I will again be able to use frame & focus.
I've also tried putting a 20 second delay in between the capture of 1 second subs, but it still failed to deliver more than the first sub.
I've tried once to capture 2x60s exposures with the same result: sequencer delivers 1 sub, fails to download the second.
Due to the fact that fame and focus seems to work flawlessly, but the sequencer does not, I doubt it's a USB cabling issue like the OP believed was causative of his issues; this definitely seems to be caused by software.
If there's anything else I can provide to make debugging this easier please let me know.
Cheers,
Lee