Electric Focuser

[Radders]

I'm thinking about having another go at making an electric focuser for my Astromaster. I made one before but used a servo which didn't work out. I've got the controller but need advice on what size tooth belt, spur gear, pulley, pinion and motor to get.

I have no problem getting the parts as I work for an RC company.

Radders

[Bizibilder]

This may be useful:  http://stargazerslounge.com/topic/91973-fiddling-with-an-autofocusser/?hl=+focusser%20+bizibilder   This has been working for a couple of years now with no problems.  I've put a servo on each of my scopes and now all I have to do is swap the power supply between them.

[Radders]

Thanks bizbilder. I tried a servo before and it didn't really work so looking at ways of attaching a motor and running it off that. Think the hardest part is somehow fixing a bracket to focuser area.

Radders

[Bizibilder]

I had the same problem and solved it by buying an extra tube ring - The Skywatcher ones have a tapped hole for a camera mount on one side and a flat with holes on the opposite one.