Posted on September 20, 2014 at 22:47Probably not up to the task. To do 2 or 3 axis interpolation you need to do it in a front end program to calculate pulse distribution and velocity smoothly, such as the bregenhams algorithm . Mach3 used a fixed speed 'conveyer belt' (fifo) that he drops step pulses on a certain distance apart. The trajectory is all preplanned .
The only thing you could do with SPI is maybe point to point drilling.
Larry
