Re: Digitizing arm?

True the error is cumulative but if the error is low enough then its
ok or you could have a program look at the date and if something is
radically different then its disregarded.



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@...>
wrote:

>
> --- 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
>