Re: [CAD_CAM_EDM_DRO] Re: Re: Test Peice for 3D finishing

Thanks Ballendo,

I did know how the printer / copier works but what is unknown at the moment
is how to use such a mirror for testing / aligning a machine. The chap I
referred to remembered that they used to use something similar when he first
started work, to check the accuracy of, or set up, rotary tables and machine
slides but he couldn't remember the details of how it was actually done. He
seemed to think that they simply placed the 'polygon' mirror on the table or
slide and then shone a light at it from different angles and looked at this
light through a telescope 'collimator'. From this they could apparently work
out the exact error present.

Ian
--
Ian W. Wright
Sheffield UK

----- Original Message -----
From: <ballendo@...>
>
> The polygon mirror is a front-surface(means the shiny stuff is on the
> front surface to eliminate refraction errors)reflector used to
> provide "scanning" of the laser beam.