RE: [CAD_CAM_EDM_DRO] PIC DRO stupid question

-----Original Message-----
From: Jon Elson [mailto:jmelson@...]
Sent: Friday, 7 April 2000 1:58 AM
To: CAD_CAM_EDM_DRO@egroups.com
Subject: Re: [CAD_CAM_EDM_DRO] PIC DRO stupid question

>Really, if someone can come up with accurate grating patterns on film or
>glass, it is fairly
>easy to make your own linear encoder. Does anyone have any ideas on
>where to get
>such grating patterns?

One quick and easy way to make such a pattern would be to draw the pattern
in a good CAD program, and print the pattern on to transparency material
using the best quality injet printer you have access to.

I am assuming a resolution of 300 DPI would translate into .003" accuracy,
at a minimum. If anyone here has actually tested the output of a printer for
accuracy, I would be very interested to see the numbers.

Ok, that's the hard part done, how do you do the easy bits? :-)

Best regards
Wayne Bengtsson