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Equipment Discussions >> ATM, Optics and DIY Forum

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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: How do dual speed focusers work? new [Re: Z28500]
      #6124018 - 10/08/13 02:00 AM

Quote:

They are designed to be able to slip a little




I don't think slipping was by design.

Don


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polaraligned
professor emeritus


Reged: 12/26/08

Re: How do dual speed focusers work? new [Re: TVG]
      #6124252 - 10/08/13 07:49 AM

Quote:

Do you or anybody else on this forum have a pic of a focuser with a lead screw design?





Try to google images of a Hedrick focuser. It is used on the Planewave telescopes and uses a leadscrew.

ON EDIT: here is a link;

http://planewave.com/products-page/general-accessories/hedrick-focuser/#.UlPx...



Edited by polaraligned (10/08/13 07:51 AM)


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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: How do dual speed focusers work? new [Re: TVG]
      #6125422 - 10/08/13 04:53 PM

Quote:

Do you or anybody else on this forum have a pic of a focuser with a lead screw design?








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bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: How do dual speed focusers work? new [Re: don clement]
      #6125695 - 10/08/13 07:16 PM

I made a lead screw focuser years ago with the focus tube mounted to a dovetail block. It was butter smooth and rock solid. Made partly from a Gaertner scientific stage of some sort.
Don't care for Crayford focusers much. There is a reason I have two old AP units on my Refractors. I like Don's focuser too. Made a similar prototype in the early 80s but had no machining ability at the time.


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