iOptron CEM40 User Manual

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5.10. Zero Position
5.10.1. Goto Zero Position
This moves your telescope to its Zero Position.
5.10.2. Set Zero Position
This set the Zero Position for the firmware.
The Zero Position reference will be an undefined value after firmware upgrade, or it may lost during
power outage or HC battery replacement. You can use this function to set the zero position reference.
Press the ENTER after moving the mount to Zero Position either manually or with the hand controller.
5.10.3. Search Zero Pos.
In the event of power failure, the mount will lose all its alignment information. This can be very
troublesome if the mount is being operated from a remote observation site and is controlled via the internet.
To counter this, the CEM40 has been equipped with a function that can find the Zero Position for an initial
mount set up.
Select “Search Zero Pos.” and the mount will start to slew slowly and find the R.A. and DEC
position to set the mount to the Zero Position. When the mount has found the Zero Position, the HC will ask
if you want to calibrate the Zero Position. Press ENTER to confirm. Use the arrow button to adjust the
mount in RA and DEC to correct the obvious discrepancy in the Zero Position. Alternatively, press BACK to
cancel.

iOptron CEM40 Specifications

General

Mount	Center-balanced Equatorial Mount (CEM)
Structure Material	All metal, CNC machined
Exterior finish	Anodized red/black
Level indicator	Level bubble
Dovetail saddle	8" Losmandy D & Vixen
Hand Controller	Go2Nova® HC, 212, 000 objects database, star recognition
Cable management	Yes
Tripod	LiteRoc 1.75" Stainless Steel(7kg), optional tri-pier
Max payload*	40 lb (18kg), exclude counterweight
Payload/Mount weight ratio	2.28:1
PEC	PPEC/Real time PEC
Tracking accuracy (PE)**	<±7.5 arcsec p-p (CEM40, CEM40G), or <0.3 arcsec RMS (CEM40EC)
Motor resolution	0.08 arc seconds
Slew speed	1×, 2×, 8×, 16×, 64×, 128×, 256×, 512×, MAX(~4.5°/sec)
Latitude adjustment range	0°~ 60° (special CW shaft mounting if <10° )
Azimuth adjustment range	± 6°
Operation temperature	-10°C ~ +40°C
Right Ascension worm wheel	Φ110mm, 216 teeth aluminum
Declination worm wheel	Φ110mm, 216 teeth aluminum
Counterweight shaft	Φ28X280 mm, Stainless Steel (1.2 kg)
Counterweight	11 lb (5 kg) X1
Motor drive	Precision stepper motor, 1.8º/128X micro-step
Meridian treatment	Stop (0-14° pass), auto flip
Power consumption	0.6A(Tracking), 0.9A(GOTO)
Power requirement	12V DC 5A
AC adapter	100V ~ 240V (included, indoor use only)
Polar Scope	Internal iPolarTM electronic polar scope
GPS	Yes
WIFI	External (optional)
Guiding scope/camera	Built in guiding scope and camera, iGuiderTM (CEM40G)
Autoguide port	ST-4
Communication port	USB Port (on mount)
PC computer control	Yes (ASCOM)
Warranty	Two year limited

Weight and Dimensions

Mount weight	17.4 lb (7.9kg)
Mount base size	Φ120 mm