CR-10 mounted to Ormerod 2

thingiverse

# Note: This is just a hypothetical situation, but I wanted to share it here anyway. After several years of use and experiencing various problems with the original printed extruder (filament stuck, missing steps, and the bowden tube came loose multiple times), I decided to replace the extruder with a new one. * I chose the CR-10 extruder in the aluminum version (approximately 15 euros). * The extruder is mounted at the top of the Z-axis aluminum extrusion using two M4 standoff-screws (see picture for details). The extruder does not have a large gear, so the Extruder steps per mm need to be adjusted accordingly. # How to Calculate the Extruder Steps per mm * The default setting for the CR-10 extruder on Creality printers appears to be 95. This is the default setting to start with: M92 E95; Set extruder steps per mm. * Choose a fixed reference point on the extruder for your measurements (I used the exit connector for the bowden tube). Do not connect the bowen tube yet - otherwise you cannot see your marks! * Insert filament and set the first mark on the filament at your reference point. * Use the setting above, heat the nozzle, and extrude 100mm at a medium feed rate. Mark again at your reference point. * Repeat the above steps until you have at least four sections marked. * Remove the filament and use a ruler or caliper to measure the distance between the marks. They should be close to 100mm - but are probably a few mm off. * Write down your measurements and calculate the average distance. * Calculate the steps per mm using this formula: default steps per mm x 100 / measured length = E-steps per mm. Example: 95 x 100/101.2 = 93.873 * This results in the following g-code: M92 E93.873; Set extruder steps per mm (CR-10 Extruder, Default: 95) Hint: To get even more precision, repeat the steps from above - but now replace the default value (95) in the config.g file and the formula with the calculated value from the first pass.