[dizzy2003 (Michael)]

Well heres an interesting result, its still ongoing testing but.

I setup with asiair as normal to make sure I was getting errors. so asiair guiding and doing 60 second exposures seeing spikey errors as usual.

So then I stop the asi guiding and plug the guidecam (asi 120mm) into my laptop and run phd2. (I actually home the mount then point it back to m20 which I wish I hadnt done should have just left it).

But the phd2 monitoring isnt showing any spikes, its showing very bad polar alignment and its showing pec errors but otherwise its normal enough.

I plug the guidecam back into asiair (enable guiding on asiair) and the spikes are back.

My initial reaction is the asi 120mm is some how causing USB errors that are sending the mount crazy.

This is very promising news.


Edit:

When I switched to laptop I used a longer cable from guidecam to computer, am now trying that cable with asiair guiding, if its the usb cable from the guidecam that would be a huge win (cheap) at the same time also mega frustrating that its been months to narrow it down to this 1 thing. Normally this short (40cm) usb c cable would have been plugged into either the asi533mc as a hub or direct to asiair (I tried both incase it was the asi533 hub)

Its been about 4 mins with the new cable and no spikes and rms is at .58''
But scope is almost at miridian so it could be that its coincidentally at a good spot.

Edit2: spoke too soon just had a 8 arc second spike after about 6 mins on new cable