E-Steps Calibration for Ender 3 PRO

thingiverse

This is a G-code for the Ender 3 PRO, which may also work on other comparable printers, but you'll need to test it yourself. Why Calibrate Your E-Steps? Calibrating your e-steps helps prevent under- or overextrusion. If your models tend to fall apart easily or you get recurrent clogs, this might be for you. Printers come with standard values for their e-steps, but differences in driver settings or extruder wear are not taken into account. This also applies to different nozzle sizes and special filaments. What This G-Code Does This G-code heats up the printer, does a purge line to ensure the nozzle chamber is at the correct pressure, raises Z, and moves slightly onto the bed for easier cleanup. Then it attempts to extrude 100mm of filament. How to Run the G-Code Run the G-code as you would any model G-code. Wait until the Z-axis is raised. After that, you have 30 seconds to measure 120 mm of filament from the extruder and mark it with an Edding or a similar marker. Once the filament is extruded, check how much filament is left from the extruder to your mark. If the e-steps are correct, it should be 20mm. How to Calibrate Let's assume you have left 30 mm instead of 20 mm. Go into "Control" and then into "Motion." The last item on the list should be e-steps. The factory default is 93. 120 mm marked - 30 mm remaining = 90 mm extruded. 93 e-steps / 90 mm = 1.03 e-steps per mm 100 mm (wanted) x 1.03 e-steps = 103 e-steps According to this, you want to set your e-steps to 103. Afterwards, go up one menu step and then "Store Memory." Done! You have just calibrated your e-steps and flashed a new default value into your printer's firmware. Note: I don't know which other printers support on-the-go flashing of new e-steps values, so if you have any other printer or the Ender 3 (non-pro), you might not be able to save the value this easily. UPDATE 02/2020 Added a measurement tool so now there is a convenient way to measure 130 mm. Yeah, right! 130 mm. I got this after I was done. Doesn't matter, just keep in mind to calculate accordingly.