Go ahead, make my Bed..........................standard deviation

https://www.easycalculation.com/statistics/standard-deviation.php


Standard Deviation for Z axis


jim3Dbot .29, .31, .30, .30, .30, .30, .31, .31, .32, .34 = 0.01398mm Robo3dR1 (no relevant mods) E3v6



Here's how this works, run - auto-level 10 times, record - the 'Z' axis ten numbers, hit - link, enter - your ten numbers, enter a negative number with the minus sign. Copy - standard deviation result from the equation, and post your ten numbers with the standard deviation result.

I'll organize the results alphabetically here. Your original post will be deleted. This will be a benchmark for you & others to compare...........for example: if you install an additional bed surface, change the bed, axis, sensors, carriage components, etc.....you may notice a deviation change.....good or bad.........let's see how it goes......................Take Care

 

You are sooooo right...did it long-hand first, then after the fact.............Is there a simple plug-in formula out there?......link makes it easy.....we will see how it goes for a week or so..........if no interest.......it needs to be removed......