Flow Rate Calibration Cube

I have seen many people do this wrong.
Printing 1 calibration cube is not enough

This test is the correct way to calibrate 3d printer flow rate.

The instructions for how to run this test are in the excel document

Here is a summary of what you will do:
1. print the cube using both your normal settings and again in vase mode ('spiralized outer contour' in Cura)
2. measure the 4 sides of both cubes and input the data into the excel file along with the flow rate, and your acceptable error
3. iterate this with the new flow rate until the test passes in the excel spreadsheet, then you will have the optimal flow rate


I have entered the equations that I derived and tested into the excel spreadsheet, however here is a summary of how I got them:
When printing there is the average thickness of the flow line and there is also some extra squish on the outermost wall than extends out beyond the average wall thickness (you see this as layer lines on the print). From this I der