Author Topic: Losmandy G11 on PC -- do i need the Gemini goto-system?  (Read 294 times)

Stephen Moritz

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Losmandy G11 on PC -- do i need the Gemini goto-system?
« on: December 31, 2017, 04:23:44 PM »
The Losmandy G11 looks pretty great but i just want to run it from PC, don't need the Gemini goto computer and pad. Any way to drive it directly via ASCOM on PC, and maybe save a few bucks. Is there a way to connect the "S" model to your PC via RS232 or USB w/o full goto-system?



frosperloacatch

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #1 on: January 12, 2018, 02:13:19 AM »
You won't need a hand controller but you do need Gemini that's what controls the motors.

calfkommomu

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #2 on: January 12, 2018, 01:01:27 PM »
Quote
The Losmandy G11 looks pretty great but i just want to run it from PC, don't need the Gemini goto computer and pad. Any way to drive it directly via ASCOM on PC, and maybe save a few bucks. Is there a way to connect the "S" model to your PC via RS232 or USB w/o full goto-system?

No

luseatcidood

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #3 on: January 15, 2018, 06:25:17 PM »
Explore Scientific has the G11 that comes without the Gemini, their version of the electronic motor controls are ascom compliant. You may want to further investigate this particular system.

Warning: It seems a little pricey.

https://explorescien...engoto-software

Ronald Saldana

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #4 on: January 16, 2018, 11:34:07 PM »
Two other options to consider include Sitech
http://www.siderealtechnology.com/
And Avalon's Stargo
http://www.avalon-in...-control-system
Shawn

Keith Pennington

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #5 on: January 17, 2018, 08:38:46 AM »
Good comments but my aim was to reduce the price of the G11 goto by omitting the goto in favor of using my PC, however, seems that doesn't fly.

Nicholas Becker

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #6 on: January 18, 2018, 05:42:51 AM »
Quote
Good comments but my aim was to reduce the price of the G11 goto by omitting the goto in favor of using my PC, however, seems that doesn't fly.

As I understand it, you need one of these systems to make it work. Another option is finding an older Gemini 1 system. There are/were a few other options out there as well but I believe the SiTech, Avalon, ES, and Gemini are the ones still currently produced and generally available.

There might be a way to control the mount with the base motors, but they are so slow it apparently is not practical.
Shawn

risodachest

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #7 on: January 20, 2018, 08:35:23 PM »
Quote
Good comments but my aim was to reduce the price of the G11 goto by omitting the goto in favor of using my PC, however, seems that doesn't fly.

Correct

Joe Mallard

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #8 on: January 22, 2018, 10:13:38 PM »
Bottom line. If you want something cheaper, the EQ6-R beckons. If you want cheaper and light, the iEQ45Pro.

There are lots of good choices, no need to do something unusual. In AP bright ideas often aren't so bright. A lot of really smart, really talented, very experienced people are in AP, and following the crowd is often the best path, especially if you're new to this.

From the superb book "Stumbling Into Happiness".

"The thing about most people is that they are like most people. The other thing about most people is that they think they are not like most people."

fucheatisu

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #9 on: January 26, 2018, 06:25:01 AM »
Quote
"The thing about most people is that they are like most people. The other thing about most people is that they think they are not like most people."

That is true. But every tomato is different in it's own special way.

Just thought I'd throw that in the mix for no special reason.

luseatcidood

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #10 on: January 26, 2018, 07:47:58 AM »
There is a cheaper alternative AstroEQ this would allow you to use EQmod to control and get goto from your PC.

In the example Linked URL bellow Gary used Nema 17 motors directly coupled to the worm gear (direct drive), however you I think you could also connect AstroEQ to the stepper motors on the S model, but your slew rate will be very slow. I actually acquired Gary's kit as he sold his G11 with the Gemini reinstalled in favour of the Eq6/Az mount. I have as yet not installed the system, but I have in the past used Sitech with Gemin servo motors , and Gemini 1. I like the standalone nature of the Gemini but I find the menu system more complex than necessary give me Autostar or Nexstar any day. The Sitech is very robust system but has no stand alone got mode as yet. The PMC-8 is an alternative and will require a PC or Windows Tablet. You could equally use a Windows tablet with Sitech system. I am not sure the pmc-8 supports encoders like the Sitech and gemini1 , so if you declutch to rebalance you lose position. Sitech can also be used with high res encoders directly (TDM built in) they were the first to do this.

Chepeast option is AstroEq again you could run Eqmod on a Windows tablet or PC. If you stepper motors and don't want to diy , you could purchase the supper motors for g11 from other kits. I.e buy the supper motors from Avalon or Fs2 etc and just rewire the for AstroEq. Note though these steppers will not give you direct drive as they have a gearbox. But Note buying these kit motors is more expensive than getting Nema 17's and making your own bracket to install them on the g11.

http://www.iceinspac...d.php?p=1186990

Daniel Johnson

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #11 on: January 30, 2018, 02:20:15 PM »
Quote
Quote

"The thing about most people is that they are like most people. The other thing about most people is that they think they are not like most people."

That is true. But every tomato is different in it's own special way.
And some tomatoes are just destined to be ketchup.

ontoolhaiworl

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Re: Losmandy G11 on PC -- do i need the Gemini goto-system?
« Reply #12 on: January 31, 2018, 02:40:02 AM »
Tomato is my favorite fruit/veg.