Re: ATM Grinding machine arm pressure

["Bill T." <twentiethwave@hotmail.com>]

Adam Perkins wrote:

> Why not use a spring-loaded arm and reduce the load on
> the drive train?  That way, the eccentric only has to
> work against the drag of the tool across the mirror,
> and not the inertia of waving 40-50 pounds around on
> the end of an arm.

Inertia out at the lap is not a bad thing.  Keeps everthing moving nice and
smooth.  Absorbs chatter, vibration, etc.  IMO, high tool inertia improves
surface smoothness.

Bill T.