Technical parameters
Steppers: NEMA 17, 400 step, 1,5 Amp
Drive disk: D 220 mm, stainless steel
Drive roller: D 6 mm, hardened and coated steel
Encoders: Optical incremental, 72 000 pulse/rev
Weight: 20 kg
Load capacity: 45 kg
Maximum unbalanced torque: 15 Nm (1,5kg at 1m radius)
Elevation range: 20 - 90 deg
Temperature range: -20 to +30
Driver: Pulsar2 http://www.geminitelescope.com/pulsar-goto-controllers/
Slewing precision: cca +/- 30 arcsec
Max slewing speed with Pulsar2. 4 deg/sec
Tracking precision: 2”/5 minutes
Power: 12-18VDC, 3A (1A continuous draw at 12V)
Telescope interface: Losmandy rail or custom
Delivered Parts
Equatorial head with Losmandy adapter, Counterweight shaft (30mm), Pulsar2 driver with
hand controller, cables, cable guide ring. Optional: counterweights, polar finder, tripod,
splitter box for the 12VDC supply on the RA head (specify length, number and type of
connectors).
Mount specific Pulsar2 parameters
(Non default values only)
Total Red: enter 350, the exact value will be calculated by Pulsar2
Track current: 850mA
GoTo current: 1200mA
Stop current: 400mA or 800 for guided photography
Motor step R/D: 400
Encoders: Mount encoders are fitted (answer Yes to Mount encoder RA and DEC,
answer No to Motor encoder RA and DEC)
Resolution: 72 000 both RA and DEC
Rotation: leave as it is, will be defined by Pulsar2
Umod Sp limit (user parameters) 990
Ramp (user parameters) Ra 1, Dec 2
Backlash (user parameters):0 arcsec
There are videos on YouTube to help with the setup and other features. Visit this link to see the
updated list: http://www.geminitelescope.com/gemini-german-fork-mounts-goto-manuals/
G53F manual ver 2.7 p2 June 2017 www.geminitelescope.com
battery are all suitable. Switching PSUs can sometimes create interference and not work properly. IF
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