Manual tool change + tool probe

  • Axolito
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12 Jan 2023 13:13 #261694 by Axolito
Manual tool change + tool probe was created by Axolito
Hello,
(I don't speak English very well, I hope you will forgive me)
I have just finished building a mini CNC with LinuxCNC.
I use a BOB for parallel port and the Gmoccapy user interface.
I attached a push button to my board to be used as a tool length measurement probe (I know it won't be accurate, but waiting for better).
My spindle uses an ER11 tool holder. For the moment I don't mind changing tools by hand.

I followed the instructions on this page to get the manual tool change from Gmoccapy and remap M6 to take a measurement at each tool change:
linuxcnc.org/docs/html/gui/gmoccapy.html...uto-tool-measurement

But this procedure doesn't seem to fit my use. I tried to change some settings in the .NGC file of the subroutine, but without success.
Here is how I would like to use my machine:
- mount any tool or keep the one already installed
- jog exactly where I want to start my machining on my block (on top)
- do the zero part (X - Y - Z)
- start my program

I would like all following tool changes to apply the offset according to the first tool (which was used for the part origin).

So I would need some guidance in modifying the tool change and tool measurement routine.

Thanks in advance

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  • andypugh
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14 Jan 2023 10:10 #261912 by andypugh
Replied by andypugh on topic Manual tool change + tool probe
This might take some careful experimentation possibly with a drinking straw or similar for a "tool". But if you set the length of the loaded tool to zero before touching-off you might get what you want. (See the docs on G10 for how to do this in the MDI window)
Touching-off basicaly does a G10, but there are four ways that it can operate (L1, L2, L10, L20)

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  • Axolito
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14 Jan 2023 18:19 #261966 by Axolito
Replied by Axolito on topic Manual tool change + tool probe
Thank you for this answer.
I had read the documentation on G codes, but I didn't fully understand the difference between the different variants of G10.
I understood that some act on the part origin and others on the tool table, but the details and nuances I did not understand.

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