#emc-devel | Logs for 2011-09-07

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[11:59:24] <jepler> I was just watching a 3d printing demo http://www.youtube.com/watch?v=7IaFHe8RG0Q#t=2m45s -- I vaguely knew that their microcontroller-based motion controller didn't do acceleration ramping, but somehow I hadn't imagined just how badly they punish those stepper motors
[11:59:28] <jepler> it's lucky that it works at all
[12:11:19] <archivist> its not punishing to the stepper, it is stupid though
[12:15:17] <awallin_> but it appears not to loose steps?
[12:15:58] <jthornton> darn, no speakers here
[12:16:00] <archivist> its within the steppers ratings so there will be no loss of steps
[12:16:51] <jthornton> I like this "it usually works better than this"
[12:25:42] <jepler> ok, "punishing" isn't exactly accurate .. but "using them in a more problem-prone fashion", maybe?
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[12:27:12] <archivist> if well within the pull in rate then no problem, else definitely
[12:28:33] <archivist> the acceleration in EMC2 is linear iirc which also violates stepper acceleration curves
[12:29:13] <jepler> yes, it is
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[13:08:40] <cradek> I agree with the feeling of surprise that it works so well
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