RE: Motion control over RS-232

["Eric Keller" <eek105-at-psu.edu>]

Erich asks:
can  EMC  be used only with step and direction over the LPT-port
and the dedicated hardware on the PC-bus?


There is an example with the kaluga dro on ISA and step direction on pc-bus



Could it also be  interfaced over RS-232 to a motion controller with
proprietary protocol?

I have been thinking about doing something like this, because I want to use
the TI motion control dsp chips and it seems such a waste to send them an
analog signal.  The controller in emc sends out velocity demands and expects
position feedback.  I'm assuming that you mean one of those controllers
(indexers) that you tell to do a move and it does it with no possibility of
feedback.  This is problematic, and the best you could do is to strip off
the higher level of emc and use it for your own purposes.  If the indexer
can do coordinated moves, then this solution would be ok.  I intend to
pretend that my d/a and encoder interface live on the serial port, and since
I am writing the dsp code, everything will work in the current setup for
EMC.


Are examples of such customisation available already?
Unless someone is hiding something, no.
Eric