Does Linuxcnc have the capability for 2D edge digitising.

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26 Apr 2020 22:22 #165710 by beefy
I've searched on the forum for this but surprisingly I could not find one result.

Can Linuxcnc automatically probe the outer (and inner for that matter), edges of an object, i.e. Z is fixed in height position and only XY axis move to "trace" the edges of a part, and create a 2D point file.

Mach3 has a plugin called "Probe It" which I believe does this.

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27 Apr 2020 10:50 #165784 by rodw
Hmm, fancy finding you having a walk on the dark side Keith!

I think its been done but I could not find anything. I'm sure I've seen someone doing a 3D probing exercise.

You can certainly save probe coordinates to a text file within the gcode probing routine easily. I have done that for a single surface on a straight line and some people probe the whole surface before doing a circuit board or similar to adjust machining depth based on x,y coordinates... Docs for V 2.7 (current release) are here
linuxcnc.org/docs/2.7/html/gcode/g-code.html#gcode:g38

So once you have your probe data, it would not be hard to process the file to do whatever you want.

Also note that our probing may be a bit different to what you are used to. We can probe towards an object and then probe away more slowly until contact breaks for greater accuracy. That's how we do our plasma touchoffs.

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28 Apr 2020 22:28 #166020 by beefy
Hi Rod,

thanks for the reply. Sorry in the delay getting back to you.

This video shows what I'm after (@ 2:47 it starts):


My interest in Lcnc was the low cost of hardware & software and I thought something like this would be old news for Lcnc. Could have been just what I needed to be turned to the dark side LOL.

Ah well, can't win em all.

Keith

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28 Apr 2020 22:40 #166022 by tommylight
Here you go:
www.google.com/search?client=firefox-b-e...+site%3Alinuxcnc.org
Plenty of info there but i have not used it, so i can not help much.

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28 Apr 2020 23:36 #166035 by beefy
Thanks very much Tommy, I'll check it out.

Keith.
The following user(s) said Thank You: tommylight

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29 Apr 2020 00:00 #166039 by tommylight

beefy wrote: Thanks very much Tommy, I'll check it out.

Keith.

You are very welcomed, always.

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