Good thought, Karl.
________________________________ From: Karl Cunningham <ka...@keckec.com> To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> Sent: Tue, June 21, 2011 10:53:20 PM Subject: Re: [Emc-users] SuperPID with EMC? One bit of caution. The speed controls I've seen built into power tools are not isolated from the line voltage. So expect to have to isolate (optical or otherwise) any control signal between its source and the speed controller in the tool. Karl Peter Loron wrote: > 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 >>A >> 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 >>>> 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 > ------------------------------------------------------------------------------ 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
