This video is a natural sucessor to the previous one on squaring your machine.
If you do not calibrate your machine then noting you make will be the right size. The larger you make an item the larger the sizing error will be. Depending on what you make with your CNC the lack of calibration may or may not be an issue. If all you do is cut 3D models then any sizing error will go unnoticed but if you are cutting inlays then the penalty for an inaccurate machine is parts that do not fit as they should. Fortunately there is a simple way to fix this problem.
Mach3 and UCCNC have built in calibration that allows you to check real world movement against the calculated movement and then they calculate new steps per unit values automatically for you.

Calculations
The calculations can be a bit daunting and to make things easy for you I have created a spreadsheet you can download that will calculate everything for you.

The spreadsheet can be downloaded from my website along with instructions on how to use it.

https://www.cncnutz.com/2018/06/how-t...



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