iOptron IEQ75-GTTM instruction manual Appendix A. Technical Specifications

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	1×,2×,8×,16×,64×,128×,256×,512×,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

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