Flow Calibration Cube

thingiverse

A test cube that I designed to calibrate my flow percentage. See pictures for what the dimensions SHOULD be and compare to your printed model. I have 3 models for nozzles sized 0.3mm, 0.4mm and 0.5mm (I can make more, just leave a comment) First calibrate your extruder E-steps, this is super important. Have a look at a video like Tomb of 3D Printed Horrors' https://www.youtube.com/watch?v=xzQjtWhg9VE on how to do it and then once it is properly calibrated... HOW TO PRINT: Set your exact nozzle size in your slicing software, infill to 0% and bottom layers to 100 or whatever makes it solid. you should see 3 walls on the sides of the model, 2 outer walls and 1 inner. Set your flow to 100% and print. Once done measure the thickness of the walls (see 2nd image for where to measure) and get an average of the thickness then; take the expected value (0.9mm for a 0.3mm nozzle, 1.2 for a 0.4 etc...) e.g. 1.2mm, divide by your actual measured value e.g. 1.1mm and you get a value for your new flow value. e.g. 1.2 / 1.1 = 1.09 so new flow rate is 109%. Note: To calculate new flow rate for a print with a flowrate that is not 100% just do the same calculation as up above and then multiply your current flow by the value e.g. if flow is 109% and you get a new value of 0.98 then 109 X 0.98 and you get 106.8% as your new flow.