Running a three phase router/mill on a generator?

[m_c]

You can get 3 phase wherever if you want, provided you're willing to pay for it, however if you need to ask the price....

Anything will run of a generator, provided the generator is big enough. If you're powering motors, then you need to oversize quite a bit to allow for the startup surge, and you may need to run the controls through an active UPS so it's not affected by surges/interference.