Plasma cutter tool offset

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cnc_freak
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Joined: Fri Apr 20, 2018 5:36 am

Plasma cutter tool offset

Post by cnc_freak » Wed Mar 31, 2021 6:49 am

Hello.
In a plasma cutter i try to use G42 in order to compensate the arc diameter. The problem is that when i try to cut rectangle/orthogonal pieces i get the message "Concave corner with cutter radius comp".Is there a way to workarount this issue, because i can't change the cutting part with radius on the corners.
Regards.

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TomKerekes
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Re: Plasma cutter tool offset

Post by TomKerekes » Wed Mar 31, 2021 4:34 pm

No, there isn't a way to go around an "inside corner" with a round tool without gouging. You will need to add arcs to the corners.
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Tom Kerekes
Dynomotion, Inc.

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cnc_freak
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Re: Plasma cutter tool offset

Post by cnc_freak » Wed Mar 31, 2021 5:22 pm

Its an "outside corner" i want to go around. Is there a way to define a square tool?

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TomKerekes
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Re: Plasma cutter tool offset

Post by TomKerekes » Wed Mar 31, 2021 5:29 pm

Its an "outside corner"
Then you should not get that error. Maybe your entry move into radius compensation. See here.

Post the GCode and your Tool Table Settings for the Tool.

What Version are you running?


Is there a way to define a square tool?
No :)
Regards,

Tom Kerekes
Dynomotion, Inc.

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cnc_freak
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Re: Plasma cutter tool offset

Post by cnc_freak » Wed Mar 31, 2021 7:43 pm

Here are two gcode files. Rename them to *.ngc and the default.txt is the tool file, rename it to *.tbl
I use 435d version.
Regards.
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Default.txt
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00000102.txt
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00000101.txt
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TomKerekes
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Re: Plasma cutter tool offset

Post by TomKerekes » Wed Mar 31, 2021 11:07 pm

I think it depends on where the tool is when you start the Job. You don't have a controlled entry move into radius compensation.

The GCode turns on radius compensation and moves to a starting point of X=672 Y=7 and moves upward.

If the tool begins on the Left of that point it is ok:

NoGouge.png
NoGouge.png (6.73 KiB) Viewed 1079 times

If on the Right there is a gouge


Gouge.png
Gouge.png (6.34 KiB) Viewed 1079 times
Regards,

Tom Kerekes
Dynomotion, Inc.

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