These are always learning opportunities.
There is a LOT of this you could have researched on your own, and really should so you have a better understanding of what you are getting ready to do. Your saw manual should tell you the recommended breaker size. You can find a number of voltage drop calculators on the web, as well as some clear guidance on max voltage drop related to wire size, and distance.
Asking a bunch of woodworkers an electrical question gets you a lot of answers, you need to make sure they are correct. None of us have any skin in your project, and bear no responsibility if it goes bad for any reason.
Although I agree with shoot summ, I will also supply the correct answers, some of which are not correct in the above posts. Which sort of makes shoot summ's point.
First, round up to 18 Full Load Amps, just to make it simple.
Then, per code, you must use 125% of the FLA for your circuit calculations. Now you have a 22.5 amp circuit. So, the conductors must be rated at least 22.5 amps, and the next higher rating is 30 amps, which means a 30 amp circuit that uses #10 copper wire. Because this is a motor circuit, the overcurrent device (circuit breaker probably) can actually have a higher rating than 30 amps, but because the 30 amp breaker will work fine I would just use that.
Voltage drop is an interesting question in this case because the nameplate says 220. You may have higher voltage than that, which would be fine and eliminate the question. In any case you will drop less than 2 volts at full load and that's nothing to worry about.
Use Copper wire only. Consider adding a neutral to the two hots so that later you can change the circuit to something else without having to re-run the wiring.