To: atm{at}shore.net
From: Andy Saulietis 
Reply-To: Andy Saulietis 


At 12:27 AM 8/8/03, you wrote:

Jim S writes,

>      The only periodic error that I have ever identified is found in these
>places:
>A) - (D)

Also: end play in the worm shaft/bearings can be a serious PE error source,
considering that the error is ~:

206265*(end play)/gear radius = arc seconds

I usually put a small steel ball on the end of the worm shaft that turns on
a hard surface, the motor/shaft are spring loaded to keep the ball in
contact.




Andy Saulietis
ISS Enterprises
PO Box 19
Mayhill NM 88339


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