Re: [Emc-users] Temperature Controller with nested PID loops

On Fri, 2011-02-18 at 23:08 -0500, Dave wrote: I'm going to top post for brevity. http://www.redlion.net/Products/ProcessControl/PIDControllers.html 30 years ago I used something like this for controlling a muffle furnace to 600 C +- a degree or so. Self tuning pid loop. I would hope the stuff

Re: [Emc-users] Charge pump

On Fri, 2011-02-18 at 19:45 -0800, Doug wrote: > I believe I understand. File should read. > loadrt charge_pump > # net estop-out charge-pump.enable iocontrol.0.user-enable-out > net signal_name master slaves > net cp charge-pump.out parport.0.pin-17-out > addf charge-pump ba

[Emc-users] My first wiki page

Kent suggested I add some information about stepper motor speed limitations to the wiki. I tend to never finish anything because it's never good enough. This isn't good enough, but it's up there. It's titled: * Stepper Motor Speed Limitations

Re: [Emc-users] Temperature Controller with nested PID loops

I think you are talking about cascaded PID loops. Where there is an outer loop that drives an inner loop. The classic example is a vat, vessel, or reactor that is used to combine or mix ingredients which has a steam jacket around it. Here is a description: http://www.controlglobal.com/article

Re: [Emc-users] Temperature Controller with nested PID loops

On Fri, 2011-02-18 at 20:27 -0500, cogoman wrote: ... snip >I imagine a setup where three 500 watt halogen bulbs in series > (giving maybe 250 watts worth of heat, and a lifetime that will outlive > me) are nestled in an aluminum plate. Why not: http://www.amazon.com/Whirlpool-Electric-Heat

Re: [Emc-users] Charge pump

mc-users __ Information from ESET NOD32 Antivirus, version of virus signature database 5887 (20110218) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com -- The ultimate all-in-o

Re: [Emc-users] Charge pump

On Fri, 2011-02-18 at 07:56 -0800, Doug wrote: > This is what Step wizard put in the Hal. > > # Include your customized HAL commands here > # This file will not be overwritten when you run stepconf again > > loadrt charge_pump > net estop-out charge-pump.enable iocontrol.0.user-enable-out > net c

Re: [Emc-users] steppers/encoders

Bill Hribar wrote: > Hi all: > > Is it possible for EMC2 to be setup to use info from encoders to stop > movement > of a cnc machine when the EMC2 system is driving steppers? > > I have read the wiki; Steppers with encoders - jlmjvm's story, the author > said > he is able to do just that! > > I

[Emc-users] Temperature Controller with nested PID loops

I have an unusual application that might be great for EMC2. I have a small block of aluminum that need to be heated to a specific temperature. Currently we put it in a chamber, and heat the chamber to... let's say 80 degrees C. Soak for 1/2 hour an it's ready to test. When it comes out, and

Re: [Emc-users] Machine tapping was Encoders with no Index (Przemek Klosowski)

We use thread forming in 6061-t6 all the time where I work, and the threads are quite strong (even when the hole was a little oversize). What hasn't been mentioned is that as the hole becomes larger, the forming tap creates a pair of threads, or a double start situation. The second start is n

Re: [Emc-users] Interesting piece.

On Friday, February 18, 2011 07:41:27 pm Peter C. Wallace did opine: > On Fri, 18 Feb 2011, gene heskett wrote: > > Date: Fri, 18 Feb 2011 12:19:54 -0500 > > From: gene heskett > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > > > > > To: emc-users@lists.sourceforge.net > > Subject

Re: [Emc-users] steppers/encoders

Hi all: Is it possible for EMC2 to be setup to use info from encoders to stop movement of a cnc machine when the EMC2 system is driving steppers? I have read the wiki; Steppers with encoders - jlmjvm's story, the author said he is able to do just that! I noted that he said he would post his .h

Re: [Emc-users] Interesting piece.

On Fri, 18 Feb 2011, gene heskett wrote: > Date: Fri, 18 Feb 2011 12:19:54 -0500 > From: gene heskett > Reply-To: "Enhanced Machine Controller (EMC)" > > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Interesting piece. > > On Friday, February 18, 2011 12:12:24 pm Peter C. W

Re: [Emc-users] Interesting piece.

On Friday, February 18, 2011 12:12:24 pm Peter C. Wallace did opine: > On Fri, 18 Feb 2011, gene heskett wrote: > > Date: Fri, 18 Feb 2011 11:55:47 -0500 > > From: gene heskett > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > > > > > To: "Enhanced Machine Controller (EMC)" > > Su

Re: [Emc-users] Interesting piece.

I have an atom based fanless server at home, that hosts a bind9 nameserver and my personal CVS. It is awesome and consumes only 14 watts of power. It is the size of a typical hardcover book. I think that market for those kinds of servers will always exist. i On Fri, Feb 18, 2011 at 11:05 AM, Pe

Re: [Emc-users] Interesting piece.

On Fri, 18 Feb 2011, gene heskett wrote: > Date: Fri, 18 Feb 2011 11:55:47 -0500 > From: gene heskett > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Interesting piece. > > On Friday, February 18, 2011 11:36:38 am andy

Re: [Emc-users] Charge pump

On 18 February 2011 18:44, Doug wrote: > I tried without the Estop line and yes the hal connects the estop-out.  And > yes I toggled the estop.  I am not sure how fast the frequency would be but > a volt meter does not show anything.  My PBMX board with charge pump do not > enable because it does

Re: [Emc-users] Interesting piece.

On Friday, February 18, 2011 11:36:38 am andy pugh did opine: > On 18 February 2011 18:13, gene heskett wrote: > > > > I find it amazing that a tiny bunch of folk in Cambridge (not the > Massechusetts one) can corner such a huge prop

Re: [Emc-users] Charge pump

hat limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users __ Information from ESET NOD32 Antivirus, version of virus signature da

Re: [Emc-users] Rotated coordinate system

You can specify a rotation when setting the g55 to g59.3 coordinate systems. http://linuxcnc.org/docs/2.4/html/gcode_main.html#sub:G10:-Set-Coordinate sam On 2/18/2011 11:28 AM, Igor Chudov wrote: > Is there some way in EMC to specify a rotated coordinate system > transformation? > > x1 = xcos a

Re: [Emc-users] Rotated coordinate system

On 18 February 2011 18:28, Igor Chudov wrote: > Is there some way in EMC to specify a rotated coordinate system > transformation? > > x1 = xcos alpha - y sin alpha + offset_x > y1 = ycos alpha + x sin alpha + offset_y Yes, you can do it with G10. (like a virtual rotary table) http://www.linuxcnc.

Re: [Emc-users] Rotated coordinate system

On 02/18/2011 09:28 AM, Igor Chudov wrote: > Is there some way in EMC to specify a rotated coordinate system > transformation? > > x1 = xcos alpha - y sin alpha + offset_x > y1 = ycos alpha + x sin alpha + offset_y > > (going by memory) Yes: G10 L2 http://linuxcnc.org/docs/devel/html/gcode_main.h

Re: [Emc-users] Interesting piece.

On 18 February 2011 18:13, gene heskett wrote: > I find it amazing that a tiny bunch of folk in Cambridge (not the Massechusetts one) can corner such a huge proportion of the mobile CPU market. It is fascinating to think that the who

[Emc-users] Rotated coordinate system

Is there some way in EMC to specify a rotated coordinate system transformation? x1 = xcos alpha - y sin alpha + offset_x y1 = ycos alpha + x sin alpha + offset_y (going by memory) thanks -- The ultimate all-in-one perfor

Re: [Emc-users] Machine tapping was Encoders with no Index

On Fri, 2011-02-18 at 00:23 -0500, Przemek Klosowski wrote: > On Thu, Feb 17, 2011 at 4:43 PM, dave wrote: > > > > > In all this fuss over how to machine tap no one has mentioned thread > > forming. The few times I've tried it by hand it has worked well. > > > > True, but one has to be very caref

[Emc-users] Interesting piece.

For all the hoopla about the atom, the pundits seem to think it will be DOA at some point. Will there be an even newer low power platform we can use? -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ba

Re: [Emc-users] Charge pump

On 18 February 2011 17:56, Doug wrote: > net estop-out charge-pump.enable iocontrol.0.user-enable-out Is estop-out linked in the main HAL? Are you toggling the estop button? (F1) > I opened the scope and there is no frequency on pin 17. I am not altogether familiar with the charge pump, but as

Re: [Emc-users] Charge pump

This is what Step wizard put in the Hal. # Include your customized HAL commands here # This file will not be overwritten when you run stepconf again loadrt charge_pump net estop-out charge-pump.enable iocontrol.0.user-enable-out net charge-pump <= charge-pump.out addf charge-pump base-thread net