How To Calibrate E-Steps

Classic e-step calibration method for firmware like Marlin

1. Using a ruler or caliper, measure 120mm from the top of your extruder and place a sharpie mark.

   This will be your reference point.

2. Command the printer to extrude 100mm of filament.

   You can use the control panel or the software application to do this.

3. Measure the distance between the mark you made and the top of the extruder.

   If the extruder has moved the correct distance, then your e-steps are properly calibrated. If not, you will need to adjust the e-steps value in the firmware and repeat the process until you get the desired result.
   
   new_e_steps = old_e_steps * (100 / distance_actually_moved) … or, old_e_steps * (100 / (120 - distance_to_mark))
   
   The reason you placed a mark 120mm above the extruder and not 100mm is incase it overshot a bit and the mark sinks inside the extruder. This way you will still be able to see it and get an accurate measurement of how far your extruder actually traveled for the calculations.