Re: ATM Lapping In Worm & Wheel

[Andy Saulietis <iss@pvtnetworks.net>]

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
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