Auto Home when Linux CNC starts

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28 Dec 2018 05:41 - 28 Dec 2018 08:18 #123002 by CrashCNC
Is there a way to automatically home when Axis starts?

What can be added to the .ini? Or does it need to be a custom HAL function? linuxcnc.org/docs/2.4/html/gui_halui.html

Matt
Last edit: 28 Dec 2018 08:18 by CrashCNC.

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28 Dec 2018 23:26 #123041 by cmorley
I would try loading a python program that sets homing using the python linuxcnc module.
Something like:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import linuxcnc
c = linuxcnc.command()
c.home(-1)
c.wait_complete()

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29 Dec 2018 05:20 #123054 by CrashCNC
Good idea.

I'm familiar with the python script but have no idea how to make that code automatically launch when starting the axis GUI.

Any insight?

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29 Dec 2018 08:26 #123057 by cmorley
load it with HAL in the post_gui file:

loadusr python PATH_OF_SCRIPT

would probably work, but you would need to add to the script to clear estop and turn the machine on.

I must say it scares me a bit about what you are doing... I hope you have a good reason and safety plan :)

Chris M

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30 Dec 2018 23:38 #123176 by newbynobi
Have you seen NO_FORCE_HOMING in INI settings?

Or execute the python script through halui.machine_is_on

What you are doing is dangerous, so do not blame anyboddy if something goes wrong!


Norbert

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