iOptron GEM28 User Manual

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Appendix E. Computer Control an CEM26 Mount
The CEM26 mount can be controlled by a SmartPhone, a Tablet or a computer. It is supported by two types
of computer connections:
 Connect to a computer via USB port on hand controller. The mount can be controlled via
ASCOM protocol (Windows OS), or directly by some software, such as Sky Safari (Mac OS)
 Connect wirelessly via built-in wireless connection. The mount can be controlled via ASCOM
protocol (Windows OS), SmartPhone/Tablet and Mac OS wirelessly.
To control the mount via ASCOM protocol, you need:
1. Download and install the latest ASCOM Platform from http://www.ascom-standards.org/. Make
sure your PC meets the software requirement.
2. Download and install the latest iOptron Commander/ASCOM drive for CEM26 from iOptron
website. The CEM26 uses Commander for a CEM120/CEM70/CEM26/GEM28 mount.
3. Planetarium software that supports ASCOM protocol. Follow software instructions to select the
iOptron Telescope.
Please refer to iOptron website, www.iOptron.com, under the product page, or Support Directory, iOptron
ASCOM Driver for more detail.

iOptron GEM28 Specifications

General

Payload Capacity	28 lbs (12.7 kg)
Mount Weight	10.4 lbs (4.7 kg)
RA Worm Gear Material	Brass
DEC Worm Gear Material	Brass
Tracking Rate	Sidereal, Lunar, Solar
Autoguiding Port	Yes
Communication Port	USB
Tracking Accuracy	± 5 arcsec
Weight	10.4 lbs (4.7 kg)
Mount Type	Equatorial
RA Worm Wheel	180 teeth
DEC Worm Wheel	180 teeth
Motor Drive	Stepper motor
Power Requirement	12V DC
GPS	Built-in
Polar Scope	Yes, included
Counterweight Shaft	Ø20 mm
Worm Gear Period	600 seconds