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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)