Ender 3 extruder calibration ruler

thingiverse

My first 3D model on Thingiverse, hopefully you will find it useful.\r\n\r\nWhen calibrating the extruder it can be a challenge getting at the extruder to accurately measure and mark the filament, so I designed this custom ruler.\r\n\r\nIt slips into place against the extruder housing and has a 2mm groove for the filament to sit in while you mark 100mm and 120mm. Then use the control panel on the printer to move the extruder axis 100mm, and use the ruler a second time to verify whether your esteps are correct or need adjustment.\r\n\r\nThe calculation for new esteps value is (existing esteps x 100)/ new esteps from the calibration ruler. From what I have learned, it's recommended to do this calibration test three times to ensure you have the right values set.