1g Flow Calibration "Cube". 8 Minute Print.

thingiverse

This flattened "cube" is designed to use 1g or 0.36m of filament to calibrate your flow based on your top surface. It should print in 8 minutes on standard cura settings. It's desgigned to be just tall enough that theres a safe level of infill to take the print bed leveling out of the equation. To save on filament, you can also specify 0 bottom layers (only 0.27m of filament). Calibrate your flow the same way you would look at squish on the first layer. If it looks "too far", increase flow by 2% and try again. If it looks "too close" then decrease flow by 2%. Repeat until you find the best results. You can pick a value in between two of your test cubes if neither looks right. For me PLA prints best at around 95% flow. Two bed leveling squish visual guides linked here. https://cdn.discordapp.com/attachments/759605585246421035/808043261826564166/3d2Bprinting2Bbed2Bleveling2Bguide.png https://cdn.discordapp.com/attachments/759603746270609431/802946693208342528/unknown.png Notes: Its best to have more flow rather than less for strong parts. So overshoot flow if possible then inch back down. This test is designed for a standard 0.4mm width 0.2mm layer height. If you have a larger layer height or a lot of top layers make sure you turn off bottom layers or preview the print in the slicer to make sure the bottom and top layers are separated by a good amount. Flow should not be calibrated with calipers, this is a good explanation of why. https://reprap.org/forum/read.php?1,704450 If you need to adjust the dimensions of your parts, use "Horizontal Compensation" in your slicer.