#linuxcnc-devel | Logs for 2012-05-12

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[04:27:52] <seb_kuzminsky> i'm running the shopbot tonight, and it's not behaving as well as i'd like
[04:28:28] <seb_kuzminsky> i'm feeding it crappy gcode from pycam, with *lots* of *tiny* g1 moves, and as a result the machine is not getting up to my desired cutting speed of 180 ipm
[04:28:45] <seb_kuzminsky> it's doing 30-60 ipm
[04:29:01] <seb_kuzminsky> to my chip load is a tiny fraction of what it should be, and the tool is running really hot
[04:29:12] <seb_kuzminsky> after a 5-minute milling job it's too hot to touch
[04:32:35] <seb_kuzminsky> this is on top-of-tree 2.5
[04:36:14] <seb_kuzminsky> this is a pretty low acceleration machine...
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[16:54:12] <cradek> seb_kuzminsky: G64P is the way to solve that
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[18:49:59] <seb_kuzminsky> cradek: i'm using g64 p.1 (in g21), maybe i should increase the p value?
[18:50:05] <seb_kuzminsky> i don't want it to be too far off the mark!
[18:50:16] <seb_kuzminsky> this is a pretty low accel machine
[18:52:38] <cradek> it's wood?
[18:53:17] <cradek> low accel, high velocity, precision - pick any two :-/
[18:54:13] <seb_kuzminsky> the machine is steel, the workpiece is wood
[18:54:59] <seb_kuzminsky> it's got steppers with encoders, i'll see how far i can push the accel up before I start getting following errors ;-)
[18:59:55] <cradek> .1mm in wood seems very optimistic... are you sure that's as big as possible?
[19:00:05] <cradek> I don't like the tradeoff much but if you can't fix the gcode that's the only remedy
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[19:02:45] <cradek> nevertheless, I see several people have "voted" for a better trajectory planner
[19:02:55] <cradek> so I hope that vote goes through soon
[19:04:09] <andypugh> cradek: Aye, we voted for you to write it too. Odd that you didn't turn up to the meeting.
[19:04:49] <cradek> I checked the minutes of the meeting and it was decided that it was "anyone else"'s turn to write a planner
[19:04:58] <andypugh> I am wondering if I broke Mesa 8i20 support when I added all the new cards.
[19:05:28] <andypugh> I haven't tried to talk to them for a while, but there is nothing happening.
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[19:08:27] <seb_kuzminsky> i'll try half a millimeter next time
[19:08:31] <cradek> I thought people were using those
[19:08:41] <seb_kuzminsky> also, i vote we all get free ponies
[19:08:57] <cradek> ponies are a pain in the neck
[19:09:06] <cradek> they just stand around and eat hay
[19:09:09] <cradek> good for nothing
[19:09:10] <JT-Shop> I vote we all get free 3 phase power
[19:09:17] <andypugh> Yes, they are, so I have checked out v2.5 to see if it is any different.
[19:09:32] <andypugh> Then I wil get the brand-new one out of the packaging.
[19:09:54] <cradek> haha wow 24-400V
[19:09:59] <cradek> very neat device
[19:10:21] <andypugh> What?
[19:10:37] <cradek> 8i20
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[19:11:00] <andypugh> Ah, yes.
[19:21:11] <andypugh> Aha!
[19:22:41] <andypugh> It turns out that setting the 8i20 that came back from Visteurs to the same jumper settings as mine was a mistake, as I had been trying to do a firmware update, and it was left in config mode.
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