Single width walls for perimeter calibration

thingiverse

There are fantastic calibration sets out there to explore. I created one specifically to master Freecad and rapidly test perimeter extrusion width for advanced tuning of my extruder and printing setup. To get started: Slice your object, ensuring you've set perimeters=1 in vertical shells, then open the generated G-code file. Take note of the perimeters extrusion width parameter. In my case, it was 0.67, calculated automatically by Slic3r for a 0.2 layer height and a 0.4mm nozzle. Print your object. Measure the four walls carefully, excluding the bottom two or three layers. Then, compare the average measurement of the remaining walls with the parameter in the G-code file. If they match exactly, you're done! This indicates accurate extruder steps and correct filament diameter input in the slicing software. However, if issues persist, some users adjust the extrusion multiplier to fine-tune this setting. The formula for the extrusion multiplier is: Expected value / Measured value. Nonetheless, it's essential to keep this within the range of 0.9 - 1.1.