telescope control by computer

Astro software and whatever hardware

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pkshep
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telescope control by computer

Post by pkshep »

I have a Celestron Nexstar 6se and wish to control it with my laptop using either Redshift 7 Premium or Stellarium. I have ASCOM software installed and a lead from the 15pin rs232 point of the laptop to the handset of the telescope, but following the instructions I receive a message to the effect that the telescope is 'not connected'. I guess that I may have missed some required software - driver for the telescope? Or is my cable connection incorrect? Any help/advice would be most welcome.

Brian
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Post by Brian »

Hi.

I have to ask if you are certain your laptop has an RS232 port, as I've read that RS232 was dropped from most laptops a few years ago. On my laptop there is a 15-pin D connector but it's intended to run an external monitor. I do use an RS232 connection to my LX90 via the handset, but the computer end of the connection is via a USB to serial converter,

HTH,
Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed

pkshep
Posts: 12
Joined: Wed Mar 07, 2007 11:33 pm
Location: Dorset
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Post by pkshep »

Many thanks for your reply and suggestion - I suspect that you are right as I know that the connection can be used for video connection. Regarding the use of a usb port, does this require any different software to enable this use or is it just a matter of a 'mechanical' conversion via an adapter?

Brian
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Post by Brian »

Yes, you will need something like the gizmo depicted halfway down the page here(celestron 18775)

http://www.green-witch.com/acatalog/Cab ... ories.html

These do seem a bit pricey, and it's possible to get generic versions a lot cheaper (just Google). However it's reported that some cheaper chipsets don't work well with the telescope systems, and the advice is to look for adapters based on the "Prolific" chipset,

HTH,
Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed

pkshep
Posts: 12
Joined: Wed Mar 07, 2007 11:33 pm
Location: Dorset
Contact:

Post by pkshep »

Once again very many thanks. I will certainly try that device. All I need now is clear skies!
PKS

David Webb
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Post by David Webb »

I have Redshift v 7 on my Laptop and a USB to a J45 plug at the bottom of the scope handset.
However like you even though I have the Celestron driver and lots of other software on my PC when I run Redshift it tells me that no scope is connected.
It turned out that if you go to redshift, pull down menu where you set up scope, go to connections, check the port number, default in Redshift is Port 5, but the scope will look at port 9.
Just make sure you have your set to Port 9, not 5 default in software.
David
Member of SPA.

pkshep
Posts: 12
Joined: Wed Mar 07, 2007 11:33 pm
Location: Dorset
Contact:

computer control of scope - connection problem

Post by pkshep »

Thanks for your help. My system seems to default to COM3 - I will check out your advice when I get my usb connection sorted.
Patrick

David Webb
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Post by David Webb »

Yes the only thing I can see in your post what you have not got is the Celestron Scope driver which you can find on the CD that was with the scope, once that is installed your ready to go okay?
David
Member of SPA.

pkshep
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Location: Dorset
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Post by pkshep »

Thanks David. I obviously have things to learn about this allegedly simple procedure!
Patrick

David Webb
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Post by David Webb »

No problem, I am so excited now that I can move my scope around just by clicking an item on my Redshift v 7 software, it's magic honest I'm over the moon with it, please let me know if you need any help okay?
David
Member of SPA.

pkshep
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Post by pkshep »

I look forward to sharing the same experience, I have been asked to give a short talk about my interest in astronomy later this year and this would be a great help. I will let you know when I have the current problem sorted. Thanks again.
Patrick

pkshep
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Post by pkshep »

Happy to say that using a usb adaptor and the relevant software to make it act as a serial port seems to have solved the problem and I can now point the scope from Redshift 7.
Patrick

Brian
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Post by Brian »

pkshep wrote:Happy to say that using a usb adaptor and the relevant software to make it act as a serial port seems to have solved the problem and I can now point the scope from Redshift 7.
Patrick
That's great news 8)

ATB,
Brian
52.3N 0.6W
Wellingborough UK.

254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
Ro-Ro roof shed

David Webb
Posts: 73
Joined: Tue Mar 13, 2012 9:38 am
Location: Suffolk
Contact:

Post by David Webb »

Hello Patrick, pleased you have got it sorted, have fun.
David
Member of SPA.

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