Turning Archive 2007

Subject:
VS Questions

Stuart Johnson
>I added a 2HP 3 phase motor with controller to my Nova 3K and have a couple questions.

1. The controller reads mhz not rpm. Is there a reasonable way to determine the rpm? For example if it reads 30 mhz and the pulley set up is for 1440 would the rpm be 720 because the max is 60 mhz?

2. Is it better to have the belt set for a high speed and slow the lathe down to normal turning speed with the controller or set the belt lower speed and turn at a higher mhz? I don't turn large out of balance items.

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