> If you just want to go from analog to LinuxCNC, have you considered > using an ATmega to parallel port interface? The AVR can accept pure > analog or some pulsed variety, such frequency counting , PWM or PDM. A > dual parallel port PCI card is ~$15, Arduino Pro Mini for $20: > http://www.sparkfun.com/products/9218
> You could isolate the parallel port pins with a parallel port breakout > board. This could run with a real-time component. As far as I understand it that is basically what I am doing with my current approach of an Arduino with a small program to go from an analog input to frequency output, with the frequency out going to an isolated I/O daughter card input (Mesa 7i37 I believe) of a Mesa 5i23. The problem to me seems to be the software encoder rate, which I believe I would hit with your suggestion as well. Or are you suggesting not doing analog-to-frequency but rather something like 8 digital inputs and using the weighted_sum component? Thanks for clarifying, Scott ------------------------------------------------------------------------------ This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
