Unable to connect guider via “Telescope”


Dan H
 

We are currently using a SBIG STX-9000 camera with a 3 inch Paracor comma corrector. The coma corrector dictates the position of the camera limiting the camera's stack-up options. There is not enough spacing for a filter wheel and an off axis. The STX-9000 has an HDMI port that can be used with an SBIG Remote Guide Head. It's my understanding that this is an equivalent to the camera with an onboard guider chip option.

I know that the guider should be controlled via “Telescope” for pulse guiding but we have never been successful in using that option. We have been forced to use “ASCOM Direct”. My question is, could the problem be related to the unusual way the camera is configured that is preventing us from connecting via “Telescope”. Also, what are the consequences of using “ASCOM Direct” for guiding.

 


Don W
 

Hi Dan,
What camera control software are you using - MaximDL?  SBIG is now part of the Maxim Diffraction Limited company, so Maxim should work fine.

The SBIG remote guide head is a separate camera that needs it's own guide scope - it is not an OAG unless you put it on an OAG.  I don't think the STX design has the old Built-in guider chip.  Instead they use an OAG adapter/camera which is a bolt-on system.  It adds 1.1 inches to the optic train, so you probably don't have room for it.

I don't know the difference between Ascom Direct and Telescope.  I always use Telescope setting in Maxim, but I don't have any SBIG cameras.  I have never had Ascom Direct working.

The physical set up of the camera has nothing to do with Ascom Direst vs Telescope.  Those are software issues.
Don


Ross Salinger
 

"ASCOM Direct connects to an ASCOM telescope driver, and uses the PulseGuide method to send autoguider commands to the telescope. Normally this is done through the Telescope option, so that it goes through the Observatory Control window. The ASCOM Direct option allows you to use a separate driver to send the autoguider commands, or to use a driver that supports only PulseGuide."

I used this when running under ACP, where the guider settings are held in ACP and NOT in MaximDL. Don't know of any other use for it.

Rgrds-Ross

On 5/28/2021 3:55 PM, Don W wrote:
Hi Dan,
What camera control software are you using - MaximDL?  SBIG is now part of the Maxim Diffraction Limited company, so Maxim should work fine.

The SBIG remote guide head is a separate camera that needs it's own guide scope - it is not an OAG unless you put it on an OAG.  I don't think the STX design has the old Built-in guider chip.  Instead they use an OAG adapter/camera which is a bolt-on system.  It adds 1.1 inches to the optic train, so you probably don't have room for it.

I don't know the difference between Ascom Direct and Telescope.  I always use Telescope setting in Maxim, but I don't have any SBIG cameras.  I have never had Ascom Direct working.

The physical set up of the camera has nothing to do with Ascom Direst vs Telescope.  Those are software issues.
Don


Dan Hummel
 

Thanks Ross, grateful that someone could clear that up. Like any astronomer we are trying to squeezes as much performance as possible out of our equipment. We just weren't sure if ASCOM Direct gave us the best response for guiding.