GM4000 HPS II
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Designed for demanding observatories, the GM4000 HPS II delivers sub-arcsecond unguided tracking with a massive 150 kg capacity and full autonomous or remote control.
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The 10Micron GM4000 HPS II is a German equatorial mount engineered for professional observatories and long-term scientific setups. It provides unmatched mechanical stability, extreme precision and reliable remote or autonomous operation with no need for autoguiding.
This 125 kg mount features massive 85 mm and 80 mm steel axes on tapered roller bearings. It uses 32 mm tempered steel worms driving 430 and 315 tooth bronze worm wheels. Dual-axis brushless servo motors with belt-driven zero-backlash transmission ensure stable movement even under heavy loads.
With absolute encoders on both axes, the GM4000 HPS II achieves unguided tracking accuracy better than 1 arcsecond RMS over 15 minutes. Its internal sky model handles up to 100 stars, correcting polar misalignment, flexure and refraction errors. Pointing accuracy stays below 20 arcseconds RMS across the whole sky.
The system operates autonomously via a heated red-backlit multilingual hand controller and integrated Linux control box. Full remote operation is available via RS-232 or Ethernet. The mount is fully compatible with ASCOM, LX200, and all major automation software.
100-star internal modeling
Multiple alignment model memory
Satellite, comet and object tracking
Dome control via RS-232
Electronic balancing
Custom parking positions
Adjustable tracking rates (sidereal, solar, lunar)
Slew speeds up to 12°/sec (48 V)
Operating temperature down to -35 °C (optional)
USB firmware updates
Onboard multilingual interface
Mount type: German equatorial
Payload: 150 kg
Weight: 125 kg
Motors: Dual-axis servo brushless
Transmission: Belt drive, backlash-free
Worm wheels: 430 teeth (RA), 315 teeth (DEC)
Worms: 32 mm tempered steel
Axes: 85 mm (RA), 80 mm (DEC)
Bearings: Tapered roller
Encoders: Absolute on both axes
Tracking accuracy: under 1 arcsecond over 15 min
Pointing accuracy: under 20 arcseconds RMS
Slew speed: up to 12°/s (48 V) or 8° (standard)
Latitude range: 20 to 70°
Operating temperature: -15 to +35 °C (optional -35 °C)
Power: 24 V or 48 V DC – 1.5 A tracking – 5 A max – 6 A peak
Interfaces: RS-232, Ethernet, GPS, ST-4
Built-in database: stars, deep sky, planets, comets, user objects
Included: Hand controller, control unit, cables, counterweight bar, Wi-Fi module
Heavy-duty design for permanent observatories
Absolute encoder tracking without guiding
Fully autonomous or remote-capable
Extreme stability for long focal length imaging
Comprehensive database and software integration