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I've been looking into building my own CNC. Sounds like there are some experienced CNC peoople here. Does anyone know why there are not more polar coordinate

I've been looking into building my own CNC. Sounds like there are some experienced CNC peoople here. Does anyone know why there are not more polar coordinate based CNC machines? I've been wondering what the pros and cons are.

HeyLaughingBoy 8y ago
Probably because the compliance changes. The farther you go from the origin, the easier it is to push the tool away from its intended cutting path. A gantry-style machine, on the other hand, has the same rigidity anywhere in the X-Y plane. Rigidity is a bit less as Z changes (due to a longer moment arm), but it typically doesn't travel as far.