[kheston]

I've seen a number of ways to set tool offsets (G10 L1 etc), but I haven't yet found a way to read the current tool length offset in gcode.

I'm looking for a variable like #5223 (the Z offset in G54) that will allow me to read the current tool length.

Does such a thing exist in PP and/or LinuxCNC?

[soymilk]

Should be #5403

G Code Overview

What exactly are you trying to do?

[TurboStep]

All the numbered parameters are listed here:
G Code Overview
Step


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[kheston]

Interesting. I tried using #5403 in my code and it was always zero. I must have some other bug.

I'm doing some mill turning. The idea is to keep looping through a subroutine (and making parts) until a pre-defined tool length threshold is reached:

#1 = #5403
o101 while [#1 GT 4.35]
    (do stuff in a subroutine)
    #1 = [#1 - 0.5]
o101 endwhile

[kheston]

Update:

Went back and tried it:

G10 L1 P50 Z[#5403-0.5]
T50 G43 H50 M6

Works perfectly! Thanks for the tip.