e.fric precision friction drive mount · gtd e.fric precision friction drive equatorial mount...
Post on 07-Jul-2020
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E.fric
precision friction drive mount
GTD have created a precision friction drive equatorial mount based on new concepts.
Here are the most important highlights and the technical sheet.
GTD E.fric tech sheet 1 04.2020
The mount can be separated in two parts by4pc easily accessible captive bolts (theycannot be lost). The tool for this is includedwith the delivery and is useful for locking themount at the desired elevation too.
The counterweight shaft rotates with the declination axis. You can use it tomount a second small telescope or balance in declination with off-axis bored counterweights, when sliding the OTA is not convenient for some reason.
The azimuth pin of your tripod can be ina wide range, not just exactly at theradius of the screws.
GTD E.fric tech sheet 2 04.2020
The central thread for locking the mount is a replaceable bushing, you can change between M10 and M12 for example.
The RA and DEC shafts are hollow so that you can route your cables to the OTA all internally.
There is an adapter foryour Polemaster camera
on the DEC head.
GTD E.fric tech sheet 3 04.2020
You can use any stepper driver you wish. Just load the reduction parameters and go. We recommend the On step controller. The drive parameters are engraved on the motor cover.No encoder input is needed.
Technical data sheet
GTD E.fric precision friction drive Equatorial Mount
Payload 30 kg
Weight 18 kg
Latitude range 16 – 65 degrees
Azimuth pin radius, from central locking R 54 – 84 mm
Azimuth pin diameter, height D: 8 – 14 mm, H:10 – 40 mm
Telescope interface Losmandy rail
Counterweight shaft diameter 30 mm
Reduction R:480, D:360
Motors Nema 17 bipolar stepper, 1,5A max
Tracking precision Better than 2” ptv for unlimited time
Pointing precision 0,1%
Slewing speed Max 5 deg/sec, driver dependent
Electronics Any bipolar stepper driver with 8 bitmicrostepping and at least 1A current
output.
GTD
Innovation and Service since 1996
GTD E.fric tech sheet 4 04.2020
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