ini w/o restart

joeCT wrote:

Can anyone tell me how to do this or if you know for sure it is impossible.
I'm using a touch probe to set zero positions for rotational axes. Code updates the ini file with new Home_Offset parameters for the updated zero position. I'd like to get those new zeros active without shutting down and restarting. Thanks alot.
JoeCT

I can think of a couple of ways to do it, but writing to the INI file is not the right way, and won't ever work.

You ought to be able to achieve what you want in G-code, using G10 L2 or G10 L20:
www.linuxcnc.org/docview/html/gcode_main...:G10:-Set-Coordinate
(This is what touch-off does, I believe)

Alternatively (a rather different effect) you could insert offsets between the axis command pins and the stepgen input pins using the hal sum2 (or scale) functions then write to the offset pins of the chosen function using halcmd.

There may be other ways.

You can't run the INI file without restarting, that is sort-of why it is called an INI file.

However, many of the parameters in the INI file are used by the HAL file (and nowhere else), you can re-write those values with halcmd setp commands in a shell.

A brief check shows that the home positions are not read by the hal file, nor are there any pins which allow home switch positions to be changed on the fly.

In fact, I have a strong suspicion that changing the home switch position isn't really what you want to do anyway. The [AXIS_0] HOME position is only used during homing, when the sequence is finished then the value of X in machine coordinates (G53) is set to that value. Effectively a G10 L2 P0 (which I think is invalid)