Some Notes on Autoguiding the ZEQ25 with an STi
Posted 04 July 2013 - 05:27 PM
Autoguiding the iOptron ZEQ25 with an SBIG STi
Posted 04 July 2013 - 07:37 PM
It will usually run almost box stock, 1000 and 150 with good results, but I usually get the best at less than 750 in RA and DEC.
I guide with a Lodestar and 50mm Borg @ 250mm, so my results may be a little tighter than typical.
M51 Phd by Astronewb2011, on Flickr
Good luck with the ST1, keep us posted.
Posted 25 August 2013 - 01:59 AM
The ascom driver connected and I was able to move my scope but for some reason it wouldnt work in the guide programs.
I tried maximdl 5 and phd.
Also please post your phd settings.
Posted 26 August 2013 - 02:56 PM
Here is an image of the Pin Out of the ST-4 guiding port of the ZEQ 25GT
and it is NOT optocoupled on the circuit of the ZEQ 25GT mount.
This is an important thing as if both sides do have a different ground you can get Ground Loop problems. Maybe the STi is not optocoupled at the output. I had many many problems many years ago with 2 SBIG cameras due to this optocoupling topic until I decided to build a optocoupler adapter and then it worked fine with the Losmandy Gemini System.
I have been experimenting with a Sol guider and due to past experience I have integrated for the switching for each line an Optocoupler.
I am switching the lines directly from my circuit. Just pull down any line 3,4,5 or 6 against ground and the mount will move accordingly.