Motor driven helical focuser.

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Rusted
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Motor driven helical focuser.

Post by Rusted » Sun May 03, 2020 3:37 pm

Hi,

This is nothing new but is very helpful on longer H-a telescopes when you can't take the imaging monitor to the focuser.
An "inexpensive" Skywatcher DC motor drives the helical focuser's knurled ring, by friction, via a timing belt.
A scrap of aluminium angle profile is clamped to the AOK Swiss etalon adapter and supports the motor.
I used a 20T timing pulley, 280t GT2 belt and 64mm Stainless steel hose clamps.
No tools were required other than a 5mm drill for the angle piece. Crude but effective.

https://youtu.be/_S2rpBx2zNI

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Baader 160mm D-ERF, iStar 150/10 H-alpha, Baader 35nm H-a, Beloptik KG3, PST etalon, Lunt B1200S2, ZWO ASI174.

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Re: Motor driven helical focuser.

Post by marktownley » Sun May 03, 2020 3:53 pm

Impressive, simple and effective. Looks like it works well! I like it!


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Re: Motor driven helical focuser.

Post by rsfoto » Sun May 03, 2020 5:40 pm

As Mark already said. KISS method.


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Re: Motor driven helical focuser.

Post by hopskipson » Tue May 19, 2020 1:11 pm

Very nice and simple design. You have inspired an idea I have. I want to motorize the "Richview" tuner on my Solarmax 90 DS etalon. Where do you find the parts like the motor, pulley and drive belt for your project? Thanks for the inspiration.



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Re: Motor driven helical focuser.

Post by Martin_S » Sat Jun 13, 2020 12:08 pm

I motorize all my focusers, here are this weeks cloudy sky projects. Most of my motor focusers cost around $7AUD to make . Mind you having a small lathe and milling machine does help a bit.

Martin
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H - alpha setup
Lunt LS60THa Tilt-Tuned Solar Telescope, LS50FHa solar filter front-mounted Double stack etalon. 2 x Barlow
Remote etalon and focusing control's ASI290mm Camera

White Light setup
Skywatcher ED72 ,ED100, Homemade solar wedge, IR cut filter, Solar Continuum filter.

Mounts
Skywatcher HEQ5 Pro Mount ..

Darkside setup

Skywatcher ED72 ,ED100, GSO RC6 ,Celestron Nexstar 6SE.

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