R2C2 moving RepRap at 650mm/s speed, using Grbl
Bobc ported Grbl to R2C2 and even if this is experimental firmware for now, we got a top speed of 650mm/s!
This high speed is important as 3D printing resolution increases. It's also important for laser cutter machines, since they cut at high resolution already.
Here is a video of RepRap 3D printer moving X and Y axis at top speed of 650mm/s (using USB communications to PC):
Grbl is a free, open source, high performance CNC milling controller written in optimized C that will run on a straight Arduino.
And a "geek" image of Grbl code, that shows tecnhical details