Thingiverse
Telescope altitude drive by Proton
by Thingiverse
Last crawled date: 4 years, 6 months ago
(I'm getting 'Access Denied' replies on the idlers+mount.scad and picture, might be an escaping issue. ).
This thing is for motorization of an Azimuth/Altitude mounted 300mm Dobsonian telescope.
The idea is to have a belt running over large (>40cm) quarter circle pulley bolted to the scope and on a small (less than 1cm radius) pulley direct on a stepper motor.
This should give zero-backlash, high-speed driving, with an accuracy of (assuming perfect 16 step microstepping) 11 arcseconds.
With some more gearing down, better resolution is possible, but achieving zero backlash will be harder.
Animation:http://youtu.be/Y1-zTE1iXZs
Update: got the design returned from weight watchers
Todo: printing, testing, resolution/accuracy tests.
Longer term:
Make manual control for constant rate
Make Arduino sketch that does hour angle/declination to az/alt conversions and that can follow an object across the sky
finish Stellarium plugin to allow slew (goto) commands from within Stellarium, possibly with gcode?
This thing is for motorization of an Azimuth/Altitude mounted 300mm Dobsonian telescope.
The idea is to have a belt running over large (>40cm) quarter circle pulley bolted to the scope and on a small (less than 1cm radius) pulley direct on a stepper motor.
This should give zero-backlash, high-speed driving, with an accuracy of (assuming perfect 16 step microstepping) 11 arcseconds.
With some more gearing down, better resolution is possible, but achieving zero backlash will be harder.
Animation:http://youtu.be/Y1-zTE1iXZs
Update: got the design returned from weight watchers
Todo: printing, testing, resolution/accuracy tests.
Longer term:
Make manual control for constant rate
Make Arduino sketch that does hour angle/declination to az/alt conversions and that can follow an object across the sky
finish Stellarium plugin to allow slew (goto) commands from within Stellarium, possibly with gcode?