Controlling a mount through a guide port
Posted 29 March 2013 - 10:10 AM
Has anyone done this? Any tips for getting it to work?
Here's a screenshot of what I'm talking about in maxim:
Posted 29 March 2013 - 10:16 AM
Posted 29 March 2013 - 10:21 AM
Wait a minute. My laptop has an RJ-11 jack with two pins... Can I run that directly to the mount's "computer" port? Or does it need the full six pins?
Posted 29 March 2013 - 10:30 AM
It also appears that what I thought about the GPUSB was wrong. Apparently it's only for guiding, not for fast slews.
Some reading has informed me that I need to get a USB to serial adapter, and then an RJ45 to serial cable to go from my CGE to my computer. Has anyone reading done this?
Posted 29 March 2013 - 11:54 AM
then get the Celestron Nexstar serial cable. It connects to the jack on the base of the handset.
this will allow you to do full computer control of your CGE, and also allow you to flash the motor and handset firmware.
Posted 29 March 2013 - 12:56 PM
2) Serial RS232 connection via the PC port on the mount - Mount control is from the NexRemote app and/or via planetarium app through the virtual serial port in NexRemote, or an autoguide app via that virtual serial port ... but NexRemote must always be present to use this PC port interface. The cable is the Celestron #93922 (Ethernet RJ45 patch cable with a DB-9 adapter).
3) ST-4 connection via the Autoguide port on the mount - Signals/cable must be ST-4 compatible, so either off of an autoguide port on a camera or via a USB or parallel port conversion product (the GPUSB or GPINT-PT) when connected directly to a PC. The cable is a 6p6c (6 pin 6 connector) with RJ11/12 connectors. This interface does not know anything about move or high speed slew commands ... it's simply 4 direction lines (NSEW) that the controlling interface takes to ground to move in the required direction ... it's intended only for fine mount movements for autoguiding.
More info on the mount's connectivity options - www.nexstarsite.com
Posted 29 March 2013 - 02:05 PM
And thanks Orlando. I picked up a usb/serial adapter, and I think I'll make the cable I need from the directions on nexstarsite.
I'll let you know how it goes.
Posted 29 March 2013 - 04:45 PM
I'm actually quite surprised that it worked without a lot of fooling around. It seems like it usually takes me a few hours of debugging to get new things to work.