Arduino Board Question

Is it possible to create a RepRap with an Arduino Duomilanove? Can someone summarize how many I/Os the reprap has? I'm a little new at this.

Yes.

Two pins for each stepper motor (STEP, DIR), one analog pin for each temperature sensor, one PWM pin for each heater. Stepper enable pins, endstops, SD card etc. are abdicable.

You'll find a Duemilanove has more pins than absolutely neccessary, allowing you endstops anyways. Try Teacup firmware, it fits on an ATmega 168 without too many tweaks.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

Thanks for the response!

So is there a big performance difference between the 2 boards and what are Stepper enable pins?

An ATmega168 running at 16 MHz has the exactly same maths perfomance as an ATmega2560 running at that speed.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY