I am a newbie setting up a used 2010 Patriot VFD. It has never been wired for Mach 3 to control spindle speed so I am in the process of doing that. the tach pick-up on the lathe shaft only provides 1 pulse per revolution. As I am in the midst of modifying the machine, it would be easy to change the method of speed pick-up so that it would get many more pulses per revolution. I have not really used the machine yet. Would there be any advantage to doing this?

Also, there is a spare contact on the relay that selects lathe or mill motor. Would it be advantages to put a speed pick-up on the mill and route it through the relay?

Any feedback would be appreciated.