I've been looking at those routers. Glad to hear they're a good piece of kit.
I know nothing about how the internal speed control works on the router, but assuming you could simply feed a variable voltage or resistance in there, then what you suggest would work fine. You could do it cheaper if you roll everything yourself, but and Arduino makes it simple. -Pete On Jun 21, 2011, at 8:12 PM, Edward Bernard wrote: > 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=4659105001687453144&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? > > > > > > > ________________________________ > From: Kent A. Reed <knbr...@erols.com> > To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> > Sent: Tue, June 21, 2011 8:01:11 PM > Subject: Re: [Emc-users] SuperPID with EMC? > > On 6/21/2011 8:22 PM, Peter Loron wrote: >> On 06/10/2011 04:21 PM, andy pugh wrote: >>> On 10 June 2011 23:53, Jack Coats<j...@coats.org> wrote: >>>> They seem to support MACH3, but not apparently EMC2 (or at least not >>>> documented well). >>> It has a PWM input, so EMC2 control would be trivial. >>> >>> However, it is rather expensive, and duplicates on-board a number of >>> things that EMC2 would do for free. I have closed-loop PID control on >>> my milling machine using built-in EMC2 functions and a PWM output from >>> EMC2 to the motor drive. >>> >>> You should be able to use something like >>> http://grizzly.amazonwebstore.com/Grizzly-G3555-Router-Speed-Control-20/M/B0000DD1R4.htm?traffic_src=GB&utm_medium=CSE&utm_source=GB&id=uk >>> k >>> (Mainly as a cheap source of pre-assembled parts) with EMC2 PWM and a >>> very simple interface circuit taking the place of the potentiometer. >>> >> I noted a very similar looking controller at Harbor Frieght for $19. Has >> anybody hacked on one of these to drive the pot from EMC? >> >> Once I finish getting my mill basically operational, a router speed >> controller is next on my list. For now, of course, I could just rig up >> some sort of tach and twiddle the pot by hand to the the desired speed, >> but... >> >> -Pete > Pete: > > I've purchased several similar controllers from different sources for > use with routers and the like. Some of the controllers worked very well; > some weren't worth the cardboard box they came in. Honestly, I couldn't > predict from their external form, fit, and finish which would be > acceptable. Certainly, their retail prices didn't correlate with their > performance. I guess it depends on which offshore contract-factory makes it. > > I've not had one from HF. At the price it is probably worth trying it > but based on my experience I'd strongly urge you to test it before > bothering to hack it. > > Good hunting. > > Regards, > Kent > > > > > ------------------------------------------------------------------------------ > 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 > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
