Tool Path Rounding Issue

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17 Oct 2021 01:04 #223350 by paulsao
Replied by paulsao on topic Tool Path Rounding Issue
Sorry about my English I will explain them better. I am using PlasmaC and Fusion 360, so when I cut pieces that I don't use the smoothing function everything goes fine, but when I use smoothing in Plasmac I have the arc error (attached photo), so I check the G code of both pieces one with smoothing and the another one is not and the difference of course is the size of the G code and a G03 which is the one that produces the estimates of the smoothing then that new code is the one that the PlasmaC interpreter gives that error, I don't know if my error is in the number of tolerance but I have tried several and I continue with that error. 
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17 Oct 2021 01:26 #223353 by Michael
Replied by Michael on topic Tool Path Rounding Issue
Can you post the two g code files? Why do you want to use shooting from fusion?

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17 Oct 2021 01:46 #223357 by paulsao
Replied by paulsao on topic Tool Path Rounding Issue
Thanks for your answer I am attaching the 2 G code and I am using the Plasmac post processor.
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17 Oct 2021 23:12 #223425 by MaHa
Replied by MaHa on topic Tool Path Rounding Issue
Comparing the files, non-smoothing on the left, looks far better in the sim.
 
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17 Oct 2021 23:20 #223426 by paulsao
Replied by paulsao on topic Tool Path Rounding Issue
Did you open it in qtplasmac?

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18 Oct 2021 01:21 #223430 by MaHa
Replied by MaHa on topic Tool Path Rounding Issue
The smoothing version is impossible to load with linuxcnc, my cam is capable to display toolpath from external loaded files. but then failed to follow the displayed contour, as expected.

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18 Oct 2021 05:53 - 18 Oct 2021 05:57 #223433 by phillc54
Replied by phillc54 on topic Tool Path Rounding Issue
I tried loading both in QtPlasmaC.

noSmoothing.ngc loads fine

smoothing.ngc does not load, I get this error:
Mon18 16:50 G-Code error in smoothing.ngc
Near line 26 of
/tmp/emcflt-frkj78uq.d/smoothing.ngc
Radius to end of arc differs from radius to start: start=(X54.4565,Y61.2711) center=(X46.5479,Y57.0455) end=(X47.9508,Y63.9894) r1=8.9667 r2=7.0843 abs_err=1.882 rel_err=20.9937%

A 20% error is quite large, there must be issues with the PP. The second image on this post seems to confirm that.
forum.linuxcnc.org/20-g-code/42361-tool-...ssue?start=10#223425
Last edit: 18 Oct 2021 05:57 by phillc54.

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18 Oct 2021 11:55 #223447 by paulsao
Replied by paulsao on topic Tool Path Rounding Issue
Phill what is the minimum supported error for linuxcnc to work fine, I corrected some tolerance values ​​and I have error = 0.4% but still I still have an arc error

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18 Oct 2021 12:13 #223449 by phillc54
Replied by phillc54 on topic Tool Path Rounding Issue
You can change the CENTER_ARC_RADIUS_TOLERANCE_MM value in the RS274NGC section of the ini file. The value is in mm but I am not sure what the maximum valu is.
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