Adding custom buttons

This might be a mind numbingly stupid question, and I may have overlooked something very obvious in the countless ways I have searched google, so please bear with me, I'm rather new to LinuxCNC, when the usage goes beyond just starting it up get it to process g-code.

How do I add a button to the GUI, that let's me touch off the current coordinate system to a known offset?
.. or executing some custom g-code for that matter..

I have added a camera to my mill, and I would like a simple solution to touch off the workpiece, with a known offset. Even just adding custom default values other than 0.0 to the touch off dialog, would do the trick.

Hi start using some g-code with mdi input.

G38.2 Probe toward workpiece, stop on contact, signal error if failure
G38.3 Probe toward workpiece, stop on contact
G38.4 Probe away from workpiece, stop on loss of contact, signal error if failure
G38.5 Probe away from workpiece, stop on loss of contact

complete g-code line example :
G38.3 Z-100 F500 (height measuring with probe)
G10 L20 P1 Z-10 (correction to z height value)

Good luck.

A gladevcp panel embedded into AXIS is the usual way.
linuxcnc.org/docs/2.7/html/gui/gladevcp....d_action_mdi_widgets

Chris M

If you have a centering camera, this might help

forum.linuxcnc.org/48-gladevcp/30587-cam...essie?start=10#87728

Thanks, I'll have a look at both.

For some reason though, either CamPY, glade or qv4l2 isn't stable on my setup, seems like the video dies, and glade throws a "g_object_ref: assertion `object->ref_count > 0' failed".

But I can get video in a in a tab using mplayer, so this is less of an issue for now.

I used mplayer too. -vf rectangle can be used to draw the center lines. I'm using the camera to touch off also connected it to the sheet align subroutine to set the rotation. I tested it in a tab in the Axis UI but prefer the separate window.