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Old 08-04-2018, 12:30 PM
Saturnine (Jeff)
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Saturnine is offline
 
Join Date: Jul 2008
Location: Wollongong
Posts: 1,597
Hi Lars
I've made a few crayford focusers over the years and to achieve a reasonable friction for the drive I've glued a strip of the finest grain wet & dry ( 1600 g ) to the flat on the drawtube. Have worked almost trouble free for me , giving a positive drive.
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