The GM1000HPS mount is built for the demanding observer using photographic
instruments up to a weight of 25kg 55 lbs (counterweights not included).
Movements are driven by two AC servo motors, with timing belt reduction having zerobacklash.
Both axes feature a classic worm wormwheel pairing. The wormwheels are made of bronze (B14), with a diameter of 125mm and 250 teeth, while the worms are built of alloy steel with a diameter of 20mm. The axes themselves are made of 30mm diameter alloy steel, for the maximum rigidity.
The double dovetail mounting plate guarantees the maximum compatibility with many telescope manufacturers.
The electronics are housed in an independent control box, easily removable. The connections of motors, encoders and hand pad feature secutiry lock screws. The mount can be controlled using the included hand pad, without connecting an external PC. The keypad is built in order to maintain the maximum readability in all lighting conditions. Both the display and the ergonomic keys, allowing for the use of gloves, feature a red backlight. A heater keeps the display warm for usage below freezing temperatures.
The mount can be controlled using the most
common software packages by connecting it to a
PC with the RS-232 serial port or the Ethernet
connection, via the proprietary 10micron ASCOM
driver or the Meade compatible command protocol. Furthermore, a dedicated software (also
included with the mount) can be used to create a
"virtual hand pad" replicating exactly the functions
of the physical hand pad. The RS-232 port can also be used to control an external dome. This
flexibility makes the GM1000HPS an ideal mount
for observatories and remotized observing sites.
The object database contains many star catalogs
and deep-sky objects up to the 16th magnitude.
Solar system objects can be tracked so that their motion is compensated with respect to the stars. You may load orbital elements of comets,
asteroids and artificial satellites into the mount, so that these objects can be tracked directly using the hand pad (without any external PC).
The connections of the control box.
Pointing is made accurate through the
usage of a model containing up to 100 stars,
which allows for the correction of the classical polar alignment and conic errors,and also of the most important flexure terms of the optical tube. In this way it is possible to obtain pointing accuracies of the order of 20 arcseconds RMS. The same model can be used in order to obtain the maximum tracking accuracy, compensating also for the atmospheric refraction (depending on the local atmospheric pressure and
A series of auxiliary functions is provided to help the user for quick aligning the mount to
the celestial pole.
You may save and recover the alignment data of different observing sessions. This function
is very useful if you have many instruments in different setups, each one requiring different
Tracking through the meridian, a typical problem with german mounts, is solved allowing
for tracking for up to 30° past the meridian (configurable), in both directions. In this way
any object can be tracked for at least four hours.
The tracking accuracy makes autoguiding not necessary for many uses. The absolute
encoders on both axes allows to obtain a typical tracking error below 1 arcsecond. It is
possible to autoguide anyway, using the ST4-compatible port or through the
serial/Ethernet connection, with a guide rate configurable from 0.1x to 1x. The guide rate
can be automatically corrected for the declination of the target, so that there is no need of
recalibrating the autoguide when observing at different declinations.
Designed for field use, the GM1000HPS is easily transportable. The main body of the mount, without the counterweight shaft, has a weight of only 19.5 kg 43 lbs.
Other functions of the mount are designed in order to obtain the maximum flexibility in
the most usage conditions.
The mount can be switched on and off using the dedicated connector on the control box
You can use the electronic balance functions in order to balance your instrument without
unlocking the clutches.
The mount can be parked in different user-defined positions.
An external dome can be controlled directly using the RS-232 serial port, avoiding the
need of using a dedicated external PC. Once configured with your instrument parameters,
the firmware is able to make all the calculations required for positioning the dome slit in front of your optical tube, for almost all instrument configurations.
TECHNICAL DATA SHEET
Type German Equatorial Mount
Weight (mount) 19.5 kg 43 lbs without accessories
Instrument payload capacity ~ 25 kg 55 lbs
Latitude range 0° 82° (90° optional)
Azimuth fine adjustment range +/− 7.5°
Counterweight shaft 30 mm diameter, stainless steel, weight 1.7 kg 3.7 lbs
Axes 30 mm diameter, alloy steel
Bearings Pre-loaded tapered roller bearings
Roller thrust bearings
Worm wheels 250 teeth, 125 mm diameter, B14 bronze
Worms diameter 20mm, alloy steel, grinded and lapped
Transmission system Backlash-free system with timing belt and automatic
Motors 2 axes AC servo brushless
Power supply 24 V DC
~ 0,5 A while tracking
~ 3 A at maximum speed
~ 4 A peak
Go-to speed Adjustable from 2°/s to 15°/s
Pointing accuracy < 20 with internal multiple-stars software mapping
Average tracking accuracy
< +/− 1" typical for 15 minutes (< 0.7" RMS)
with multiple-stars software mapping and compensation
of flexure and polar alignment errors
Security stop +/− 30° past meridian in r.a. (software)
+/− 45° past meridian in r.a. (mechanical)
Communication ports RS232 port; GPS port; autoguide ST-4 protocol port;
Stars: by name, Bayer designation, Flamsteed designation,
Bright Star Catalogue, SAO, HIP, HD, PPM, ADS, GCVS.
Deep-sky: M, NGC, IC, PGC ,UGC limited up to mV = 16.
Solar system: Sun, Moon, planets, asteroids, comets,
artificial satellites. Equatorial and altazimuth coordinates.
User defined objects, fast slewing positions.
User defined mount parking position, 2-stars and 3-stars
alignment function, up to 100 alignment stars for
modeling, correction of polar alignment and orthogonality
errors, estimate of average pointing error, storage of
multiple pointing models, sidereal, solar and lunar tracking
speed adjustable on both axes, declination-based
autoguide speed correction, adjustable horizon height
limit, pointing and tracking past meridian,, assisted
balance adjustment, manual or GPS based time and
coordinates setting, dome control via RS-232, configurable
atmospheric refraction, network settings, comets and
asteroids filter, multi-language interface. Remote Assist via
Remote control via RS-232 or Ethernet; proprietary
ASCOM driver or Meade compatible protocol; update of
firmware and orbital elements of comets, asteroids and
artificial satellites via RS-232 or Ethernet; virtual control
panel via RS-232 or Ethernet. Optional Wi-Fi.
Terms and Conditions
Copyright ©2012 Ian King Imaging Ltd.
Site built by Savagescape Ltd.