Crayford Focuser

Crayford Focuser

This topic has 3 replies, 3 voices, and was last updated 7 May 2018 at 11:31 by Neil Wyatt.

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6 May 2018 at 21:34 #353098
John Purdy
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@johnpurdy78347
After reading Neil's lead editorial comments in issue #265 of MEW about the passing of John Wall the designer of the Crayford Focuser I remembered that I had copied the original ME article many years ago intending to make one for my 6" scope. The one I had made when I built the telescope when I was 15 was slightly less than satisfactory. The Crayford didn't get built, though, till a good many years later when I saw an advert in Sky & Telescope for the first(?) commercial one by JMI.
Here are some photos of my version of the Crayford Focuser, including the patterns for the two castings used, and my original 1 1/4" focuser.
Advert

6 May 2018 at 21:34 #31219
John Purdy
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@johnpurdy78347
7 May 2018 at 06:55 #353125
Bob Mc
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@bobmc91481
Nice job John..
7 May 2018 at 11:31 #353167
Neil Wyatt
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@neilwyatt
Nice one John, mine is waiting for me to remake the spindle housing, my DRO slipped and I ended up making the top too thin to take the required grub screws.

Neil
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