I am working on R2C2 board, a cutting edge electronics for RepRap 3D printers, Makerbot, etc.
R2C2 board already prints very quickly and there is no problems like the ones of
slow processing on RepRap electronics and
here.
But why ARM microcontroller (32bits; 100MHz and DMA) VS AVR (8bits; 16MHz; NO DMA) from RepRap electronics? -- For bringing new functionalities to RepRap machines, like working stand alone (without the need of a PC), higher resolution, higher print speed and higher print quality.
I hope to release the boards/firmware soon.
More info here:
HBox_RepRap_Electronics
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New cutting edge RepRap electronics, ARM 32 bits @ 100MHz runs RepRap @ 725mm/s:
[
www.3dprinting-r2c2.com]