On Tue, 10 Jan 2006 13:59:32 -0600, Jon Elson
wrote:

If we have
to retension the toothed belt, or even replace it every year, that won't be
a problem. But, I'd like to know if there is a stated procedure for that.
(I don't have a good feel for how much radial load the SEM motors are
comfortable with.) Obviously, if this keeps needing adjusting in the same
direction, we are compensating for SOME change in the system, probably
mechanical.

Some belts stretch with time & service.
--
Cliff