USB controller for TG-SP II or any other mount?
Posted: Thu Jan 11, 2007 2:20 am
To replace the hand paddle to control the mount, so that we can guide in fron of the PC, or even use GuideDog or something similar to do autoguiding?
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Last night I examine my TG-SP II closely and I found that the DEC slow motion control knob is attached to its shaft like that of a typical focuser, so I think it's very easy to replace it with a focusing motor.dpanderson wrote:oldfield,
Page 5 of this document is exactly what I need. I have a lot of other projects going on right now, so it may be months before I could even think of getting to this, but I will consider it. If nothing else, I think the handcontroller can be modified to add an ST-4 compatible guide port. However, there is no declination correction, and no easy way to add that. So, you will still need meticulous polar alignment.
thanks!dpanderson wrote:See this document for a way to modify your handcontroller to add an ST-4 compatible autoguide port to it:
http://store.shoestringastronomy.com/do ... _HCMod.pdf
I checked that standard TTL current is like 0.4mA but the coil of the relay you suggested requires 25mA... So the GPUSB adapter actually delivers more than 25mA?dpanderson wrote:See this document for a way to modify your handcontroller to add an ST-4 compatible autoguide port to it:
http://store.shoestringastronomy.com/do ... _HCMod.pdf