Re: Porting EMC to different hardware

[Jon Elson <jmelson-at-artsci.wustl.edu>]

Eric Keller wrote:

> I was looking at the motion controller last night to see how i could port
> the code to my hardware.  One thing that i was wondering was if the code as
> written could use a tachometer instead of deriving velocity from delta
> position.
>
> The other thing is i think the external interface is fairly clear, but if i
> do read the tachometer i would like to set up a dma interface and just have
> the current velocity waiting to be read in memory.
>
> I guess my question would most easily be answered if i could find code for
> the servo to go analog input with a tach.

Gee, everybody else is begging for a way to do WITHOUT installing a
tach.  I am using a tach for velocity feedback on my servo amps, only.
The EMC does not get this info, only what it can deduce from the encoder.
I'm not sure what the advantage is in having the tach feedback to the
computer.

Jon