Ignoramus13208 wrote:

On 2011-09-10, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:


What do you think of the idea of having absolute positioning information
in EMC, rather than the "dead reckoning" positioning provided by screws
of unknown accuracy? Do you know if anyone else has approached it this
way? (i.e. - taken a DRO, and used it for the positioning info?)

(Not just Ig... any other comments are welcome)

Lloyd, this will work just fine. It is a known approach. If your DRO
is absolute, you can also avoid homing.
Well, if he has 1 uInch encoder resolution, then at 60 IPM he will have
a million encoder counts/second. That is fairly fast. Also, how will
he read this into EMC2? An existing quadrature encoder counter, or is
Lloyd going to build something custom to read the absolute data?

Jon