Autoguide port sending W and S signals, not E and N

jvsperoni

Anyone have suggestions or ever experience something similar?

My setup suddenly stopped working correctly. I am using ASI120MC, PHD2 software, iOptron ieq45 mount, ST-4 guide cable. I have rebooted my PC several times, swapped cables, reset PHD2 to defaults settings, etc. and I wonder if my camera's autoguide port is broken.

When I start the PHD2 calibration process, RA moves west the 25 distance, but then does not return to the east and calibration fails. PHD2 manual guide function will move RA west and DEC south, but the east and north buttons do not activate the mount motors.

I ruled out mount (iOptron ieq45) and ST-4 cable problems by disconnecting the cable at the guide camera side, shorted the pins one at a time and got motor movement for all 4 directions. Through process of elimination I think it has to be some weird PHD2 bug or a guide camera (ZWO ASI120MC) defect.

Sam@ZWO

do you have a multimeter?

you can test like this meansure the direction pin and common pin

they should be connect together when you enable the direction guider

then you can hear the sound from multimeter

also you can check if all the pin in the ST4 socket is in the right position or not

jvsperoni

Sorry it took 2 months to reply. The "left" and "down" pins don't respond with a multimeter; right and up are working okay. PHD2 and Fire Capture show similar results, so it's likely a camera problem not software. Warranty return looks like the next step.

The ASI120MC was bought from High Point Scientific in April 2014. I cannot find my itemized receipt and have contacted them for help.

Sam@ZWO

thanks we got this news from Dave from HPS

the return steps will be like this:

you return the camera to HPS

HPS check it for you

HPS return the camera to us if it have such problem.

we will repair it and send to you

you can contact me though this email: sam.wen(at)zwoptical.com to check the procedure

thanks