Astronomy Site: Meade Advanced Products Users Group Archive: Re: [M]: LX 200 RA motor : uneven slew speed


 

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Subject: Re: [M]: LX 200 RA motor : uneven slew speed
From: Steve Blackmore
Reply To: mapug@shore.net
Date: Sat Jun 30 00:07:44 2001

While you're here, how about checking out the Astronomy Book List ?

On Fri, 29 Jun 2001 15:55:25 EDT, you wrote:


>
>You could adjust the clearance, as has been suggested, to reduce the pressure
>when on a 'high' lobe, but remember that this will also reduce the spring
>tension some, so that when on the 'low' lobe, there won't be as much seating
>force to mesh the gears. Its' a 50-50 tradeoff, whichever way you choose.
>And that's okay, except it's a pain to have to keep pulling the cover off of
>the scope, stretching or compressing the spring, putting it back together,
>etc.

Bruce - There was an exchange of emails a few months ago regarding the
same problem between myself, Doc G and a few others (Not sure whether
it was here or the LX200 group). I found that both the RA & DEC
pivots on my LX200 were effectively seized. It was impossible for the
spring to push the worm back into a "backlash free mesh". Loosening
both grub screws (with the application of heat to melt the Meade
supplied 'Loktite') then lubricating and readjusting to remove all
free play, then allowed the springs to work as designed.

Following a new PEC training session, I've effectively got a scope
that now tracks!!

DEC backlash altered from 50 to 13, RA runs smoother - now all I need
is some decent clear nights again <G>.

--
Steve Blackmore

Pilot Consultancy Limited ***** Computer Consultants
Telephone 01744 752256 Mobile 07831 768478

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