If you are using a Windows Computer with Astronomy programs that say
they support ASCOM drivers, then you are going to need to install the
ASCOM Platform 6.2 and then the Gemini ASCOM Driver.
Go to the
ASCOM Standards Site and in a box on the right you will see a Download
button. This should be the latest version of the ASCOM
Platform. Download it and install it.
Next you will need the
Gemini ASCOM driver and install it.
It should be version (220.127.116.11). This will also be the
latest version released. Please note that this driver requires .Net
4.0 Framework. You can
download Net 4.5 here. Windows 10 has Net Framework 4.6
built in. It might need to be turned on.
If you have never installed or setup the Gemini.net ASCOM driver then
here is instructions for
first time Setup.
If you are going to use Ethernet to connect your Gemini-2 to
your computer here are
instructions to do that.
Please see the "ASCOM/USB/GPS-->ASCOM Related" menu in the top menu bar
for more selections.
Why use the Gemini.net ASCOM Driver with the Gemini-2: (or Gemini-1)
It provides a standard interface to the mount that many other software packages can use.
It's a convenience and in many cases a requirement.
If you want to share the connection to Gemini across two or more software packages, ASCOM is the only game in town today.
What's more, nearly all programs from small companies and authors require ASCOM because it makes it much easier
to develop for a wide variety of mounts (and cameras, and observatory equipment) without investing tens or
even hundreds of thousands of dollars to develop and test for each individual mount.
Small developers do not have the resources to do so. By developing their software for ASCOM,
they automatically provide support for all types of mounts without a major investment.
It can be controlled via a Serial Cable, a USB connection
or Ethernet (Preferred). (Gemini-1 Serial Only.)
Able not only control the mount with Ethernet, you can also guide
through the same cable.
If UDP Ethernet connection is used. The speed is extremely fast,
even faster that an USB connection. Also the load on the computer is
ASCOM Driver and Gemini.net ASCOM Driver provides for having many clients
connected to the telescope at the same time. The Gemini.net
ASCOM driver is a HUB.
You can use ASCOM drivers along side the Gemin.net ASCOM
driver, such as for focusers, Camera's, and Observatory and
guiding programs. They will share information between
themselfs as needed.
Guiding through the ASCOM Gemini-2 Driver provides many
The guiding is Synchronous - which means two-way, the
Gemini-2 will acknowledge the guiding commands. Using the
Guider input this is not possible.
The guide program can tell the mount how much to guide,
instead of a fixed guide pulse. The Guider input relies on an
interrupt for the RA signal, but a timer for the DEC, which
means DEC guiding pulses possibly can be missed if they are too
short. This problem does not exist when using the Ethernet port
to guide, using Pulse guiding.
No guider cable is necessary, therefore almost any camera
can be used to guide as long as you have a driver for the
camera. The camera does not need guider output plug.
Less cables means less chances of a ground loop, which can
cause possible damage to electronics. Ethernet has a built
in transformer to help isolate it's input, thus preventing
As an small example you can have TheSkyX, MaximDL, PHD guiding using pulse
guiding, all connected at the same time, plus many more of ASCOM
compatible programs. A few of the programs that use the ASCOM Driver to connect to the Gemini
1 and 2 are:
Sky Tools 3
Carte du Ciel
Many others. See the program you want to use to see if it
Page last updated on Aug 5, 2017
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and sells nothing and asks for no money for any help it provides. This
here to help fellow Gemini-2 and Gemini-1 owners. This Web Site is not
associated with Losmandy-Hollywood General Machining Inc. or any of
their employees and never has been. There is no guarantee that all the
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is an unpaid beta tester, and tries to work with other beta testers, and
René the writer of the firmware.
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