#linuxcnc-devel | Logs for 2012-03-07

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[16:29:03] <cncbasher> JT: you'll just have to leave go of the tape measure sometime
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[18:53:24] <IchGuckLive> anyone can point me to the name of the gcode interpreter file ?
[19:01:33] <jepler> IchGuckLive: src/emc/rs274
[19:02:09] <IchGuckLive> thanks
[19:03:32] <jepler> in master, it's possible to add new words to gcode in python. I am not familiar with the details. if mhaberler is watching, maybe he can point you at the appropriate information.
[19:03:43] <IchGuckLive> jepler: is there a documentation how it works thrue a line of G-code
[19:04:33] <mhaberler> the docs for new codes are here:
[19:04:34] <mhaberler> http://www.linuxcnc.org/docs/devel/html/remap/structure.html
[19:04:50] <IchGuckLive> Mercy
[19:04:53] <mhaberler> the examples are in configs/sim/remap
[19:04:55] <mhaberler> ?
[19:05:30] <mhaberler> you will manage, here is an example for mortals: http://www.linuxcnc.org/docs/devel/html/remap/structure.html#_an_minimal_example_remapped_code
[19:06:18] <mhaberler> I suggest you concentrate on what you want to do, and describe that as an oword procedure
[19:06:27] <mhaberler> it can be made a code lateron easily
[19:07:19] <IchGuckLive> this woudt be the berst but i try to get real G12G13 G150
[19:08:20] <mhaberler> as I said: a procedure can be easily transformed into a new code. It would help if you try the example I just gave, so you understand the idea and also that a PhD is optional
[19:08:56] <IchGuckLive> i go for the examole
[19:09:00] <mhaberler> as G12,G13, and G150 are not currently used they are open to remapping
[19:09:06] <mhaberler> excellent, wont hurt a bit
[19:11:10] <mhaberler> I oppose fiddling with the interpreter when the same thing can be achieved by a remapped code. This is why I added cycle support for remapped codes, and why I dropped a complete g74,g74.1,g84,g84.1 set of tapping cycles because I think they would make good examples for remappable codes and dont impact anybody else with my ideas if they dont like it
[19:12:04] <IchGuckLive> agree
[19:13:06] <mhaberler> also, an oword procedure will serve as an executable spec of what you're trying to achieve, much better than gobs of web and manual links. That is something which can be discussed and improved/changed if needed
[19:17:25] <mhaberler> there's a complete, running config in configs/sim/remap/getting-started which shows how to create a new M and G code, as an oword procedure or in Python - give that a try and start changing things until you see how things fit together
[19:18:24] <IchGuckLive> i see forward as i got already the o preceture
[19:18:40] <IchGuckLive> di i need to start this from a new git pull ?
[19:18:45] <mhaberler> master
[19:18:48] <IchGuckLive> to get this function
[19:19:42] <mhaberler> what are you running?
[19:19:59] <IchGuckLive> 10.04
[19:20:17] <IchGuckLive> no real time kernel
[19:20:18] <mhaberler> that is the operating system, I was referring to the Linuxcnc version
[19:20:33] <IchGuckLive> i got multiple git
[19:20:42] <mhaberler> which branch did you pull
[19:21:10] <jepler> this python stuff is in the master branch and not in v2.5_branch
[19:21:17] <mhaberler> yes
[19:21:29] <IchGuckLive> git clone git://git.linuxcnc.org/git/emc2.git emc2-dev
[19:22:13] <mhaberler> that by default will pull master, so you're set - cd to configs/sim/remap/getting-started and run 'linuxcnc demo.ini'
[19:22:37] <mhaberler> then study the ini file and the other files it refers to
[19:22:49] <IchGuckLive> ok
[19:23:04] <mhaberler> cento punti ;)
[19:23:15] <jepler> mhaberler: can you say in a few words what the use case is for remapping S or F?
[19:23:24] <IchGuckLive> dident it change to linuxcnc.git
[19:23:55] <mhaberler> very delicate question
[19:23:57] <IchGuckLive> to get the new master branch
[19:24:52] <jepler> if you want to get updates since you cloned, the relevant git commands are "git pull" and "git fetch"; to "git clone" again is a waste of network traffic.
[19:25:13] <jepler> the name of the git repository hasn't changed yet
[19:25:28] <IchGuckLive> thanks
[19:25:29] <mhaberler> what do you mean by 'yet' ;)
[19:25:31] <jepler> even when it does change it'll either be transparent or a one-time "git config" command will fix it
[19:25:45] <jepler> mhaberler: at some point a url ending in 'linuxcnc.git' will begin working
[19:25:58] <mhaberler> ah
[19:26:00] <IchGuckLive> by
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[19:26:37] <mhaberler> re S,F: I was going through the codes and thought, ok, lets make them all remappable - no immediate use case for those (I admit they are exotic)
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[19:27:59] <jepler> I suppose some people might subsume gear changing functionality into 'S' somehow
[19:28:07] <mhaberler> for instance, yes
[19:28:19] <mhaberler> thanks for that idea;)
[19:28:21] <jepler> still trying to imagine what you'd do with 'F'
[19:31:08] <mhaberler> actually the gearchange scenario is interesting for my mill config - currently if I give a high S and am in low gear, it would just crank up the vfd to max and not reach at-speed
[19:32:05] <mhaberler> an error message would be marginally brighter
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[19:37:47] <jepler> FP math is hard. http://emergent.unpythonic.net/01331134959
[19:38:27] <jepler> (nothing new there except that the graph shows just how bad FP math can be)
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