Talk:Melzi
Is it possible to saw off those 4 stepper drivers? I miss a fifth stepper driver and a support for milling also. --IRBaboon
- Judging from the PCB images, you could remove the X/Y/Z relatively easily with straight vertical cuts. The right edge of E overlaps with other traces, though. Sparr 03:03, 20 November 2011 (UTC)
Have you thought about the AT90USB1286 for the chip? Its specs are mostly comparable to ATmega1284p (a few fewer ADCs but it still has 8) and has integrated USB, and is a lot better than the ATmega32u4 from Arduino Leonardo. Also, are the endstop pullups (R24, R25 and R26) really necessary? Why can't we rely on the AVR's internal pullups? --Guan 19:59, 5 March 2012 (UTC)
