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BUDA

PHD2 disconnects ZWO ASI 120MM Mini

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Hi All!


I have guiding problem with the following guider setup: 9x50 finder + ZWO ASI 120mm mini + PHD2.
The imaging scope is a 6' newtonian + canon dslr on a HEQ5, driven by a laptop via diy EQDIR cable.
When the mount is set up and running correctly, polar aligned and all... I connect the guider camera
and mount with phd2. All nice and easy, I run a calibration, then it starts to guide. All seems ok.


Then I am starting to take pictures. The first seems OK, then the second have the star trails...
I check phd2 and there is a message: the camera (ASI) did not take a picture for "xy" seconds so it is disconnected.
Grrr.... I reconnect try to set up a longer period for "xy" in the settings as mentioned in the message.
And all the same again and again. Whatever I add for connection timeout for the camera, it just reaches that
and disconnect the camera.
PHD + philips toucam has worked for me flowlessly. I changed to PHD2 because I gave myself a birthday present,
the little ZWO camera. (and PHD did not recognize it)
Do you have any idea what can be the problem? I will contact PHD2 help also, but maybe somebody had already
the same problem and figured out how to overcome. I am almost sure I make some dumb mistake in the PHD2
software settings, however I tried to change only what was needed.

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Hello!

Check the power management for your USB devices/ports and disable power saving for them. Maybe it's because of this.

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Here are some things to try:

Make sure you are using the latest version of PHD2 ( 2.6.6 dev 1)

Try using the 'other' driver for the ASI120 mini (there are 2 ASCOM drivers and a ZWO native driver - can't remember at the moment which gives the better results, so swapping and seeing may be a good idea)

Try switching from 16 bit to 8 bit images

Post your PHD2 guide and debug logs over on the PHD guiding forum 

If you are connecting via a USB 3 port, switch to a USB 2 one

 

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Thanks for the quick help! Will try all (one by one) and give a feedback.

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Tonight I had the chance to give it a try. I disabled the usb power saving first, but I could not even start looping in PHD2. I started to worry, but as I chose the ZWO camera driver (not the ascom ZWO) everything went as a charm. Thanks again for the help!!!

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