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#1
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I am having some trouble getting smooth motion out of my router. I am under the impression, i can not recall why, that cv does not work well with arcs. I actually have two systems. A plasma system where I had to change the posts in sheet cam from mach with arcs to mach with out arcs. Seemed to be necessary to get smooth motion out of plasma table. The router on the other hand is still aproblem. It seem to speed up and low down between each G2/3. The posts in Artcam do not offfer a Mach post with out arcs. I should mention I have limited exposure to gcodes. I just know the problem is associated with G2/3. Anyone had any insite to this work be greatly appreciated Simple 30 by 15 inch oval I am having trouble with. (test3) G90 G20 G49 G0Z0.2500 M3 S15000 G0 X0.2501 Y15.4937 Z0.2500 G1 Z0.0400 F50 X0.2866 Y16.9981 Z-0.0036 X0.3998 Y18.4996 Z-0.0473 X0.5892 Y19.9924 Z-0.0909 X0.6717 Y20.4699 Z-0.1050 X0.5892 Y19.9924 Z-0.1191 X0.3998 Y18.4996 Z-0.1627 X0.2866 Y16.9981 Z-0.2064 X0.2501 Y15.4937 Z-0.2500 G2 X0.5892 Y19.9924 I29.5410 J0.0351 F100 G2 X3.0103 Y27.1952 I19.7952 J-2.6453 G2 X5.6221 Y30.0274 I7.3153 J-4.1258 G2 X8.7920 Y30.6713 I2.3823 J-3.6032 G2 X11.7484 Y28.8696 I-1.2736 J-5.4164 G2 X14.4533 Y23.9742 I-10.3456 J-8.9113 G2 X15.4108 Y11.0076 I-26.8353 J-8.5002 G2 X12.9897 Y3.8048 I-19.7952 J2.6453 G2 X10.3779 Y0.9726 I-7.3153 J4.1258 G2 X7.2080 Y0.3287 I-2.3823 J3.6032 G2 X4.2516 Y2.1304 I1.2736 J5.4164 G2 X1.9850 Y5.8552 I9.4055 J8.2753 G2 X0.2501 Y15.4937 I24.2326 J9.3373 G1 X0.2501 Y15.4937 Z-0.2500 F50 X0.2866 Y16.9981 Z-0.2876 X0.3998 Y18.4996 Z-0.3253 X0.5892 Y19.9924 Z-0.3629 X0.6717 Y20.4699 Z-0.3750 X0.5892 Y19.9924 Z-0.3871 X0.3998 Y18.4996 Z-0.4247 X0.2866 Y16.9981 Z-0.4624 X0.2501 Y15.4937 Z-0.5000 G2 X0.5892 Y19.9924 I29.5410 J0.0351 F100 G2 X3.0103 Y27.1952 I19.7952 J-2.6453 G2 X5.6221 Y30.0274 I7.3153 J-4.1258 G2 X8.7920 Y30.6713 I2.3823 J-3.6032 G2 X11.7484 Y28.8696 I-1.2736 J-5.4164 G2 X14.4533 Y23.9742 I-10.3456 J-8.9113 G2 X15.4108 Y11.0076 I-26.8353 J-8.5002 G2 X12.9897 Y3.8048 I-19.7952 J2.6453 G2 X10.3779 Y0.9726 I-7.3153 J4.1258 G2 X7.2080 Y0.3287 I-2.3823 J3.6032 G2 X4.2516 Y2.1304 I1.2736 J5.4164 G2 X1.9850 Y5.8552 I9.4055 J8.2753 G2 X0.2501 Y15.4937 I24.2326 J9.3373 G0 Z0.2500 G0 X0.0000 Y0.0000 G0Z0.2500 G0X0.0000Y0.0000 M5 M30 |
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#2
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I have always found G2/G3 to be perfect. If your motor tuning, acceleration and pulsing rate setup are not optimal this is the first place you will notice lack of smoothness. If the PC speed is inadequate, or KHz speed too high, or DMA access is interrupting the CPU, smoothness of motion will deteriorate. Read the attached, and this will give a better understanding of why it even works at all under windows. First, get rid of ALL un-necessary background tasks, especially anti-virus stuff, automatic updates, and have at least 500MB memory. If CPU is below 1 GHZ the attached will also give the reasons for special requirements. If it is on a laptop, you MUST disable any battery saving setup. Apologies if necessary to Art Fenerty, for including file. I could not find a link to it. Does anyone know the link?
__________________ Super X3. 3600rpm. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way. |
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#3
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http://www.machsupport.com/docs/Mach3_CVSettings_v2.pdf
__________________ Gerry Mach3 2010 Screenset http://home.comcast.net/~cncwoodworker/2010.html (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |
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#4
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Thanks all I have partially solved this. I found my self play the cv settings on settings page in mach3. Changing cv feedrate and enabling / disabling cv while it was a running some test code and it just started to work. Artcam cam back with the suggestion of adding a g64 to the code which I suspect would have curred the issue. So i can not put a finger on the the exact fix pbut all is well now. Thanks Much |
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#5
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| G64 turns on CV mode, G61 turns it off. As I said, you'll be better off turning off CV Feedrate and all other CV options, until you know exactly what they do. The wrong CV Feedrate can cause it to not work properly.
__________________ Gerry Mach3 2010 Screenset http://home.comcast.net/~cncwoodworker/2010.html (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |
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