Re: [ATM] flex rocker azimuth stickiness

["Rod Brackenridge" <rjbr@gawab.com>]

Hi Jay,

Thanks for the response and link to the photos - looks like a
nice group of telescopes.  

Jay Kirkland writes: 
> I've no experience with a small tri but I did have a couple hundred 
> lb 20" Obsession-style that moved smoothly with teflon and ebony star. 
> Did you do the Kriege/Berry weight/size of bearing calculation for 4 
> instead of 3 bearings? 

Yes I did do that.  I also tried magic sliders but they made
things worse.  If I apply car polish and armorall, I get
acceptable movement but only temporarily.

And could you be getting extra friction from the 
> keeper bearings? Are the bearings sitting flat under the flex rocker? 
> On the re-build of the 20, I didn't even consider teflon - just went 
> straight to sealed ball bearings. I used 4 sets of three bearings each, 
> a bolt with it's head cut off for the axle. Instead of ebony star, I 
> used 1/16" aircraft grade aluminum. 

I don't think it's the keeper bearings although I was
suspicious.  I loosened them off and could not detect any
improvement in movement.  I intend to go the bearing and teflon
route too.  Rather than aluminium, I thought I would try a hard
laminex on the azimuth bearing.  

Did you reach any conclusions about tracking with your tri -dob?
 I appreciated the pictures of your equatorial platform as I
would like to make one for my children's telescope - a 6 inch
F5.  

Thanks for your interest,

Rod.
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