EM-400 Temma-2 specifications

Main Specifications

Spec.	EM-400 Temma-2
Type	German Equatorial Mount
R.A. slow-motion	Motor driven
DEC. slow-motion	Motor driven
Azimuth adjustment	± 10° with rotary base plate
Elevation adjustment	with ML altitude wedge: 0° to 50° with HL altitude wedge : 15° to 55° (default version for Europe)
Polar finder / Accuracy	Built-in / 2'
R.A. setting circles accuracy	No setting circles
DEC. setting circles accuracy	No setting circles
Encoders	Included
Weight	Main block : 22.5 kg Altitude wedge : 5.2 kg Total weight (with counterweight shaft) : 29.5 kg
Counterweights	2 x 8kg
Maximal loading capacity	35 kg (without counterweight)
Optimal loading capacity	20 kg (without counterweight)
Operating voltage	12V / 24V DC
Power consumption	@12VDC : 0.5/0.7A (NS, sidereal rate and tracking speed) ; 1.6A (HS, pointing speed) @24VDC : 0.4/0.9A (NS, sidereal rate and tracking speed) ; 1.4A (HS, pointing speed) Standby mode : 0.1A
Tube mounting	Flat base with 4 x M10 et 2 x M8 screws
Mounting capacities	Tube rings, plates and dovetail mounting plates
Option	Tripods, stand piers

Mecanical specifications

Spec.	EM-400 Temma-2
R.A. axis diameter (material)	40 mm (steel)
R.A. worm gear shaft diameter (material)	20 mm (steel)
R.A. gear diameter (material)	150 mm/180 teeth (bronze)
DEC. axis diameter (material)	40 mm (steel)
DEC. worm gear shaft (material)	20 mm (steel)
DEC. gear diameter (material)	150 mm/180 teeth (bronze)

Motor Drive Specifications

Spec.	EM-400 Temma-2
Type	Temma-2
Stepper motor accuracy	50 pps
Slow motion speeds	R.A. : 0.1x to 1.9x sidereal rate DEC. : ± 1.5' to 13.5' (by increment of 1.5'/sec)
High speed mode	12V. : 250x sidereal rate (R.A.), ± 1°/sec (DEC.) 24V. : 500x sidereal rate (R.A.), ±2°/sec (DEC.)
Worm gear shaft cycle	8 minutes
Tracking accuracy	± 5"
Autoguiding	SBIG compatible (mini-DIN PS2 connector)
PC connectivity	RS-232C serial port (with S-VHS to DB-9 cable)