#linuxcnc-devel | Logs for 2015-06-17

[06:52:25] <KGB-linuxcnc> 03John Thornton 052.7 70a054b 06linuxcnc 10docs/man/man9/hostmot2.9 Docs: restore guess as to what was causing the build warnings * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=70a054b
[07:33:12] <skunkworks> http://electronicsam.com/images/KandT/testing/grbl/mach4.png
[07:33:40] <linuxcnc-build> build #2591 of 4008.deb-precise-amd64 is complete: Failure [4failed shell_1] Build details are at http://buildbot.linuxcnc.org/buildbot/builders/4008.deb-precise-amd64/builds/2591 blamelist: John Thornton <bjt128@gmail.com>
[07:34:40] <skunkworks> I don't even know what I am looking at here... It looks like it goes from max velocity to 0 and back..
[07:34:41] <skunkworks> http://electronicsam.com/images/KandT/testing/grbl/mach4halscope.png
[08:19:11] <pcw_home> Crazy
[08:20:38] <skunkworks> It seems to be following path - (well i a machian way..) but the velocity sure looks odd
[08:23:58] <pcw_home> and the long time constant accel filter blurs the fast velocity steps so much that accel is not representative of whats going on
[08:25:43] <pcw_home> looks like it sharpens some corners, not a good thing in general...
[08:30:02] <pcw_home> looks so broken as to be unusable, maybe some settings need changing (I vaguely remember someone saying CV mode did not work yet)
[08:31:08] <skunkworks> http://electronicsam.com/images/KandT/testing/grbl/longerlog.png
[08:34:13] <skunkworks> longer log
[08:35:28] <skunkworks> people say mach4 is much smoooother....
[08:36:53] <pcw_home> There must be something really wrong as that would instantly stall a stepmotor
[08:37:36] <pcw_home> and turn a big machine into a Earthquake simulator
[08:40:55] <pcw_home> sure there's no electrical problem? (or maybe parallel port driver problem) looks like the step stream just stops sometimes
[08:44:38] <pcw_home> But I guess if it lost steps the gcode path an actual path would not be even similar
[08:45:05] <pcw_home> maybe you need to buy a ESS :-)
[09:09:51] <skunkworks> heh
[09:10:13] <skunkworks> it tracks. after each run 0,0,0 is 0,0,0 on both machines.
[09:10:22] <skunkworks> I should run it slower and see if it looks better.
[09:11:20] <skunkworks> a few people have started complaining that mach4 does corner rounding at higher speed. which is what I see. But mach4 currently has no way of controlling path following..
[09:11:41] <skunkworks> mach3 had some controls for it. (odd stuff imho)
[09:12:53] <skunkworks> brian is planning on adding it after he gets a, b and c done..
[09:15:46] <skunkworks> your 7i92 blows the ess out of the water for expandabillity.. (and realtimieness...)
[09:15:52] <alex_jon1> learning the abc?
[09:16:06] <skunkworks> alex~
[09:16:08] <skunkworks> !!
[09:16:42] <skunkworks> baby is getting cubby. (shirley always wanted a cubby baby.. stella was a stringbean..)
[09:17:05] <alex_jon1> heh, cool ;)
[09:17:10] <alex_jon1> hi, btw
[10:15:34] <skunkworks> wonder if I have some other hardware to test mach4
[14:21:00] <mozmck> skunkworks: I just ran across this again - funny in light of your recent testing: "More have made a commercial gimmick, but I think that'll be it bang on the head only while it is "crack"." http://www.linuxcnc.org/index.php/english/forum/49-basic-configuration/27900-thc-config-that-works?limitstart=0#47677
[14:21:43] <mozmck> Pretty funny translation anyhow :)
[14:26:28] <skunkworks> something was lost in translation...
[14:27:17] <mozmck> Seems like...
[22:19:03] <cradek> mozmck: that reminds me of this, http://antirez.com/news/61
[22:42:53] <memleak> hello all, im trying to cross compile linuxcnc for ARM. so far I have: CC="arm-unknown-linux-gnueabihf-gcc" CPP="arm-unknown-linux-gnueabihf-cpp" CXX="arm-unknown-linux-gnueabihf-g++" ./configure --host=x86_64-unknown-linux-gnu --target=arm-unknown-linux-gnueabihf --with-kernel-headers=/home/ntu/devel/arm/linux-4.0.5 --with-module-dir=/home/ntu/devel/arm/linux-4.0.5/output --with-boost-python=boost_python-2.7
[22:43:08] <memleak> however that returns this: configure: error: Xinerama library or headers not found
[22:43:34] <memleak> when i remove CC, CPP and CXX vars it goes away but uses my host's compiler
[22:44:23] <cradek> it sounds like you don't have the arm xinerama library available
[22:45:04] <memleak> no i don't.
[22:45:24] <memleak> ah it won't just use the compilers it needs a full ARM distro
[22:47:02] <memleak> i forgot thats how cross compiling works. thanks cradek!