Re: Digitizing arm?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Don C" <tekno62@...> wrote:

>
>
> Im on the CNC zone also. so have been reading, from what I have been
> looking at today and if I have done my math right the 5k encoders
> that I have would be .072 deg per tick. With an arm of 3 feet (6

foot radius)that breaks down to about .04" per tick.

The error is cumulative, you will have probably 5 encoders and 5 errors.

>My main problem is getting the
> data from the encoders to the computer. I found a site that talks
> about using a pic chip as the interface. then I have to see if I can
> get the 3 - 4 encoders in via USB.

Could have been my page. It is DIYable if you have the time and
motivation, there is some code on my page but it is not tested.

Graham