iOptron SMARTSTAR IEQ75-GTTM - Manual (Page 29)

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Appendix A. Technical Specifications
Mount German Equatorial Mount
Payload 75 lb (34kg)
Mount weight 52 lb (23.6kg)
Right Ascension worm wheel Φ182mm, 228 teeth bronze
Declination worm wheel Φ154mm, 192 teeth bronze
Right Ascension axis shaft Φ60mm steel
Declination axis shaft Φ45mm steel
Right Ascension bearing Φ90mm angular contact ball bearing
Declination bearing Φ68mm angular contact ball bearing
Worm gears Φ15.6mm steel
Motor drive Planetary Gear Reducer DC servo with encoder
Resolution 0.1 arc seconds
Latitude adjustment range 15º ~ 70º
Azimuth adjustment range ± 7.5º
GPS Internal 32-channel GPS
Polar Scope Yes. (with dark field illumination)
Accuracy 2 arc minutes
Hand Controller GoToNova ® 8406 with 580,000 objects database
Tracking controller
Double closed-loop tracking with Renishaw high
resolution encoder feedback
Tracking error ± 1 arc second max
PEC Real-time automatic
Speed 1Ч,2Ч,8Ч,16Ч,64Ч,128Ч,256Ч,512Ч,MAX(~4º/sec)
Counterweight shaft Φ31.8 mm (included)
Counterweight
16.5 lb (7.5kg) X 2 stainless steel (Φ150X52 mm,
included)
Base diameter Φ200 mm
Mounting plate Black anodized aluminum (150X380mm, included)
Dovetail 3.5"VIXEN Saddles included
Power consumption 0.4A(Tracking), 1.2A(Slew)
Power requirement 12V DC(11 ~ 15V), 3Amp, center positive
USB port Yes (on hand controller)
RS232 port Yes (on control box)
Autoguide port Yes (ST-4 compatible)
Firmware upgrade Yes (main board and hand controller)
PC computer control Yes (ASCOM)
Operation temperature -20ºC ~ 40ºC