Tool in spindle memory

Where is formed .var file?
github.com/LinuxCNC/linuxcnc/blob/master...s274ngc_pre.cc#L1799
??

It is normally saved in your machine's config dir

diff -ruN a/interp_array.cc b/interp_array.cc
--- a/interp_array.cc 2019-04-19 21:06:06.417653618 +0300
+++ b/interp_array.cc 2019-04-19 21:05:30.009473042 +0300
@@ -224,7 +224,7 @@
5381, 5382, 5383, /* coordinate system 9 */
5384, 5385, 5386, /* A, B, & C */
5387, 5388, 5389, /* U, V, & W */
- 5390,
+ 5390,5400,
RS274NGC_MAX_PARAMETERS
};

Adding it manually to the .var file seems like a reasonable way to enable the behaviour.

What is then needed is for iocontrol (or similar) to load the tool if it finds it non-zero in the .var file.

I think that Chris was looking at this?

Why don't you use gmoccapy?
Just go to the settings page and enable "reload tool on start up"

After that gmoccapy will set the last tool in spindle with an MDI command after you homed the machine.

Norbert

newbynobi wrote: Why don't you use gmoccapy?

Because this is a feature which shouldn't depend on the GUI.

(Gmoccapy attempts to fix too many shortcomings of LinuxCNC in the GUI when really they should be fixed for all GUIs in the common code)