On Wednesday, June 22, 2011 12:15:27 AM Edward Bernard did opine: > I have an Hitachi M12VC > http://www.google.com/products/catalog?q=HITACHI+ROUTER&oe=utf-8&rls=org > .mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&tbm=shop&cid=4659 > 105001687453144&sa=X&ei=_loBTsq9EIXl0QG9q5XQDg&ved=0CDwQ8gIwAA router > I'm very pleased with. It's very quiet, light, and inexpensive and > best of all has a closed loop speed control that maintains torque all > through its range. I have thought about replacing the potentiometer > with an interface to EMC2 and would love to hear any ideas to > accomplish this. My first thought was to use an Arduino board to > accept a PWM signal and control a digital pot. Any better (simpler) > ideas? > I have one of those, a truly outstanding piece of gear. As for a controller interface, I am using a PMDX-106, not on the M12VC, but the hookup to the pot should be very similar to the hookup to the OEM speed controller in my expanded micromill. That works very well from creeping along at 30 rpm from a 1% duty cycle of EMC's PWM generator on up to 2500 which is 99% duty on the pwm signal, and has excellent torque characteristics even at creep speeds.
Cheers, gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) 'Tis the dream of each programmer, Before his life is done, To write three lines of APL, And make the damn things run. ------------------------------------------------------------------------------ Simplify data backup and recovery for your virtual environment with vRanger. Installation's a snap, and flexible recovery options mean your data is safe, secure and there when you need it. Data protection magic? Nope - It's vRanger. Get your free trial download today. http://p.sf.net/sfu/quest-sfdev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
