Tutorial, step by step, for Auto Tool Measurement

I LinuxCNC, i have my small CNC and i have a number of tools.
Now i have the need to realize the machining with different tools and i homemade 2 sensors connected to the input PROBE-IN, one mobile, the 1.33 mm thick, and a fixed, positioned at X741 Y102 coordinates.

I can manually reset the workpiece or the tool relative to the fixed sensor.

But how can i automate the tool zero with respect to the workpiece?


Bernardo
P.S.: sorry for my English, it is generated using google translator.

If you start LinuxCNC and look in the sample configs:
sim/axis/remap/manual-toolchange-with-tool-length-switch
You will find a simulated config that does what you want.

You should just need to copy the nc_subroutines and python folders from that configuration to your configuration and then add the relevant section to your INI file:
(edit} And connect your tool-length switch to motion.probe-input

Hey

Does anyone have idea why my machine doesn't care of the "Current Z length",
I'm able to use this example config to measure the tool height, but the machine goes as deep as g-code says, without any matter how long the tool is.

I make first tool measurement with "reference tool" button pressed and second tool measurement unpressed, but second tool goes too deep, like it would be as long as reference tool.

Does the G-code contain a G43 to apply tool geometry corrections?

Thx for fast reply.

There is g43 in code, but i found out that if there is allready g43 in the "Active g-codes:" -window, the new G43 turns it to G49 and doesn't allow to turn it on again. G43 comes back in active after re-entering "t4 m6" to MDI and going through the lenght measurement.
If i manually enter to MDI new z position it works, but if i enter g43 z100 then it turns g49 mode, and goes to "absolute" value.

Use g49g53z0 to return before the tool change.

Or g49
G91g28z0

You should cancel the offset before Channing tools.