which pin is AIO2 in arduino uno?

hello all,

newbie here, which pin is AIO2 in arduino uno?

in teacup firmware - board.cnc-shield-v3.h i see this line:

DEFINE_HEATER(extruder, AIO2, 0, 1)

but in arduino uno pinout i cant find that, neither in arduino mega

background:
im building a restrap, using motors from old printers that work on 36v, teacup firmware has support for cnc shield it seams, and it fits in arduino uno and nano, i just need to know how to plug everything before i buy the electronics, arduino uno and cnc shield,

thanks in advance

AIO2 is the third Analog I/O pin. Counting starts at zero. There are also digital-only pins (DIOxx).

That said, any configuration supported by any ATmega is possible. "AIO2" is just a name, easily exchangeable. As the CNC Shield is hardwired by plugging it into an Arduino you likely don't have to touch configuration at all.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

thank you very much for yur answer, you are very kind

this week i will buy a cnc shield to start testing all electronics, probably posting more question in this forum

im so happy teacup firmware supports cnc shield (makes reusing motors from old 2d printers a lot easier) and it fits in arduino uno (wich i already bought 3 of them)