Re: [CAD_CAM_EDM_DRO] Wow this is a very slow group now it is

William Thomas wrote:

> Hi John:
> Your IDEA of having the scales and the encoder of the same or multipale units of division I think may work. In the past the idea of one system matching or checking the other gave problems of the drive unit hunting to find the right position.

No, EMC can easily handle two different resolutions of feedback. The
basic scheme is you use the linear scale for position and the shaft
encoder for velocity. The method used on Stuart Stevenson's G&L mill is
in the EMC wiki. You can't do this with breakout boards, though. You
need to provide a system for feeding many encoders into the computer.
Generally, an encoder counter board of some type would be the way to
go. For a 3-axis mill, you'd then need 6 encoder inputs.

Jon