I think this would require a custom Gcode using a remap. I made an example remap for a command 'G10.1 Xn Yn Zn'
Try this:
Add this to the [RS274NGC] section of your ini file:
Code:
REMAP = G10.1 modalgroup=1 argspec=xyz ngc=g10_increment
Create a new file with the Gcode below and save as 'g10_increment.ngc' to a folder in your
[RS274NGC] SUBROUTINE_PATH
Code:
o<g10_increment>sub
M66 L0 E0 ;force sync, stop read ahead
o100 if [EXISTS [#<X>]] ;check for X-word, set to zero if missing
o100 else
#<X> = 0
o100 endif
o101 if [EXISTS [#<Y>]] ;check for Y-word, set to zero if missing
o101 else
#<Y> = 0
o101 endif
o102 if [EXISTS [#<Z>]] ;check for Z-word, set to zero if missing
o102 else
#<Z> = 0
o102 endif
; calculate which parameter contains the current X,Y,Z offset values
#<x_current> = [5201 + #5220 * 20]
#<y_current> = [5202 + #5220 * 20]
#<z_current> = [5203 + #5220 * 20]
; add the passed X,Y,Z words to the current offset values
G10 L2 P0 X[#[#<x_current>] + #<X>] Y[#[#<y_current>] + #<Y>] Z[#[#<z_current>] + #<Z>]
M66 L0 E0 ;force sync, stop read ahead
o<g10_increment>endsub
m2
Note:
This will always apply to the currently active offset system.
You could use another unallocated GCODE :
linuxcnc.org/docs/2.9/html/remap/remap.h...:unallocated-g-codes
You could extend this to query the state of G90/91 and/or add a 'P' word to pick an offset system other then the currently active one.
