How difficult would it be...... to add new axes to the G1,G3,etc commands? Essentially, I would like to experiment with printing in grayscale with white and black filament using a switching extruder. I found a fairly simple way to modify existing gcode to be capable of printing in grayscale before realizing that currently Sprinter handles multiple extruders with the Tn gcode command; in order to achieve my goal each En would have to have its own axis such as "G1 X100 Y100 E[0]5 E[1]2". Anywho, I am happy to sit down and do the work of adding the axes to my personal work via a hardware change, but it seems this feature as a gcode standard would be highly desirable as things progress, opening up possibilities for using full RGBA colors via a 6 point switching head without using specialised hardware. So, has anyone investigated this/is anyone working on this/is this question completely moronic/does this already exist in some dark corner of Google? Thanks! https://reprap.org/forum/read.php?1,587101,587101#msg-587101 Fri, 14 Aug 2026 05:51:55 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,587101,587132#msg-587132 Re: How difficult would it be...... https://reprap.org/forum/read.php?1,587101,587132#msg-587132
Quote
Nomadfeet
So...
T0:1
G1 X100 Y100 E5:2
T1:2:4
G1 X150 Y150 E4:1:3
would comply? Thanks, couldn't find that answer in 2 hrs of searching.

Not quite. First you would have to define your tools, typically in the machine configuration file (config.g), like this:

M563 P0 H1:2 D0:1       ; tool 0 uses heaters 1 and 2 and extruder drives 0 and 1
M563 P1 H2:3:4 D1:2:3   ; tool 1 uses heaters 2,3,4 and extruder drives 1,2,3

Note that a heater or extruder drive can be shared between more than one tool. Then you can do:

T0
G1 X100 Y100 E5:2
T1
G1 X150 Y150 E4:1:3
]]> dc42 General Sat, 21 Nov 2015 10:27:09 -0500 https://reprap.org/forum/read.php?1,587101,587111#msg-587111 Re: How difficult would it be...... https://reprap.org/forum/read.php?1,587101,587111#msg-587111 T0:1
G1 X100 Y100 E5:2
T1:2:4
G1 X150 Y150 E4:1:3
would comply? Thanks, couldn't find that answer in 2 hrs of searching.]]> Nomadfeet General Sat, 21 Nov 2015 09:22:31 -0500 https://reprap.org/forum/read.php?1,587101,587104#msg-587104 Re: How difficult would it be...... https://reprap.org/forum/read.php?1,587101,587104#msg-587104 dc42 General Sat, 21 Nov 2015 09:01:11 -0500 https://reprap.org/forum/read.php?1,587101,587101#msg-587101 How difficult would it be...... https://reprap.org/forum/read.php?1,587101,587101#msg-587101 I found a fairly simple way to modify existing gcode to be capable of printing in grayscale before realizing that currently Sprinter handles multiple extruders with the Tn gcode command; in order to achieve my goal each En would have to have its own axis such as "G1 X100 Y100 E[0]5 E[1]2".

Anywho, I am happy to sit down and do the work of adding the axes to my personal work via a hardware change, but it seems this feature as a gcode standard would be highly desirable as things progress, opening up possibilities for using full RGBA colors via a 6 point switching head without using specialised hardware. So, has anyone investigated this/is anyone working on this/is this question completely moronic/does this already exist in some dark corner of Google? Thanks!]]> Nomadfeet General Sat, 21 Nov 2015 08:39:10 -0500