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maybe this will help

http://www.homemodelenginemachinist.com/index.php?action=tpmod;dl=item266


click on the blue link at the top

dont climb mill , if you do you WILL regret it big time

take a zero off and you will be somewhere near 20 rpm on a 12 dia

assume 60 fpm

them 60 x4 /12 =20 rpm

the 12 is you work dia the 4 is a constant

well for a start that pot does NOT turn off the electronics, the switch you speak of is to reset the NVR

the pot only reduces the pulse width to a low value to appear stopped , with a small...

add up the extra load imposed by the fan mod increased speed and grease load and you may well be in a over load condition


only a power meter will tell you


I was taught only to ever half...