Laser Calibration Power vs Feedrate (For Marlin/Repetier/RepRap)

prusaprinters

<p>This is a gCode file that you can use in your Laser Engraver to test the effect of speed vs power. It will produce a Greyscale burn pattern that is 140 mm / 107 mm. You can use this test pattern to get an idea of how your engraver will affect different materials.</p> <p>In the example I show here I used it to help me decide how fast I wanted the engraver to burn this image of a horse. I wanted the full range of blacks to light grey in the final result. So I burned this test pattern on the back of the wood and decided that the 10 mm/s line was close. (I should have used 12 mm/s.) Then i used an Image 2 Gcode program to create the gCode for the engraver using the 10 mm/s setting that I had chosen.</p> <h3>Print instructions</h3><h3>Category: DIY How does this Gcode test file work?</h3> <p>This Gcode file will burn a boarder rectangle from the X,Y origin that is 140 mm X and 107 mm Y. It will use the laser at full power and move at 70 mm/s (or 4,200 mm/m). It will then make a few marking lines so you know when the laser is close to 25%, 50% and 75% power.</p> <p>It will then begin the test lines. The first line at the bottom is moving very slowly 1 mm/s (or 60mm/m). it will start the laser at 1% and gradually go up 100%. (1-255 Gcode) It will then make the next line at 2mm/s (120mm/m) and the next at 3mm/s (180mm/m).</p> <p>When it gets to 6mm/s it will create a small gap to separate the 6mm/s line from the 5mm/s line. It will do this again every 5th line. So the last line of every section will be 5mm/s, 10 mm/s, 15mm/s ect.</p> <p><strong>How to use this?</strong></p> <p>Download the file.</p> <p>If your laser engraver uses M106 S### to control the laser then you don’t need to change anything. If your laser uses a different Gcode command then replace “M106 S” with your command like “M03 O”. Open the file with a text editor like notepad++.<br/> Press CTRL-H or find the edit and replace feature<br/> Type in to the find field “M106 S”<br/> Type into the replace with field “M03 O” (or whatever your command is)<br/> Click replace all.</p> <p>Save the file and run it.</p> <p>Please note that the turn off command in this file uses M106 S0. This should also work for M03 O0.</p>