alsliahona / gcode-optimizer

A command-line tool that optimizes CNC Mill and Laser Engraver gcode generated from programs like MakerCAM - also optionally converts mill gcode to laser gcode

gcode-optimizer

Copyright (c) 2014 - Andrew L. Sandoval (See LICENSE file for details.)

A command-line tool that optimizes CNC Mill and Laser Engraver gcode generated from programs like MakerCAM - also optionally converts mill gcode to laser gcode.

The image below shows a sign I made for my family opened in the "Universal gcode sender" with it's visualization view. The left-hand side is the original MakerCAM generated file and the right-hand side is the optimized file. Note that the blue lines all represent "rapid linear motion" (G0 codes) that indicate movement of the cutter above the surface of the material (or in the laser case, with the laser powered off.) The more of these you have, and the further the travel, the longer it will take to produce the final product.

Here is an image of the Shapeoko 2 burning the image from the gcode that was optimized. The laser is a 2 watt 445nm laser in an custom machined aluminum heatsink attached to the opposite side the of spindle just under the X-axis motor. It is fixed-focused based so that Z motion is not relavent and focus is set prior to starting the operation.

The final piece looks like this:

gcode-optimizer's Issues

removes all G00 and G01 commads from code

gcodelaseropt.exe ab.g -o ab-opt.g

error message

I am getting a errors messag MSVCP120.dll is missing from your computer

Windows 8.1

Dropped Z Axis raise line

First of all many thanks for this tool. I was super happy to find this.

I optimized one of my sample g-code files that really performs a lot of nonsense seek operations. What I noticed from the output of the tool is that it dropped one line of the input. It looks like it is the first G0 Z15 command which is there to raise the spindle to it's safety height.

Apart from that the optimized program worked properly and reduced the time from ~21min to ~17min!

Another output of the program was:
WARNING!!!! Program Ends with cutter down, Z = -2.00

But actually the last command in the optimized program is G0 Z15, so this warning is clearly wrong.