Extruder steps/mm calculator
Tutorial (marlin version)
Based on tutorial : Extruder Calibration: How to Calibrate E-Steps
Use calipers to measure 120 mm on the filament before the extruder and put a mark on it.
![image that show how to mark the filament before the extruder](./assets/mark-filament-Csdj2Zp2.jpeg)
Go to the printer interface and extrude 100 mm.
![image that show how to extrude 100mm](./assets/extrude-100mm-marlin-BN2d_Lwy.jpeg)
At the end of the extrusion, mesure the distance between the mark and the extruder.
![image that show how to mesure the rest of filament after the 100mm extrusion](./assets/extruder-to-mark-DcRNZFaR.jpeg)
Go to your printer extruder steps/mm configuration and note the current value.
![image that show how to setup extruder steps/mm on 3d printer configuration menu](./assets/setup-stepsmm-marlin-CeOUhg7k.jpeg)