What std. deviation mean ?
I did use G33 and got a std. deviation of: 0.008 on my Delta with 220mm bed diameter.
The leveling grid data from this printer:
Bilinear Leveling Grid:
0 1 2 3 4 5 6 7 8
0 -0.008 +0.015 +0.019 +0.014 +0.027 +0.032 +0.052 +0.042 +0.024
1 -0.012 -0.016 +0.009 -0.014 +0.003 +0.021 +0.021 +0.011 -0.003
2 +0.012 -0.013 -0.032 -0.022 -0.032 +0.012 -0.003 -0.003 -0.023
3 +0.014 -0.002 -0.018 -0.009 -0.010 -0.014 -0.011 -0.008 -0.031
4 +0.014 -0.002 -0.020 -0.001 -0.008 +0.019 -0.001 +0.003 -0.009
5 +0.016 +0.008 -0.003 +0.009 +0.009 -0.000 +0.027 +0.010 +0.002
6 +0.020 -0.001 -0.011 -0.012 +0.008 +0.001 +0.001 +0.018 +0.023
7 +0.002 -0.010 -0.002 -0.014 -0.011 -0.008 +0.013 +0.000 +0.013
8 -0.010 -0.010 -0.015 -0.009 -0.001 +0.011 +0.008 +0.005 +0.001
In my other printer with a huge size 280mm bed diameter, I've got a std. deviation of 0.012
The leveling grid data from this printer:
Bilinear Leveling Grid:
0 1 2 3 4 5 6 7 8
0 +0.033 +0.034 +0.028 -0.004 -0.034 -0.033 -0.039 +0.029 +0.116
1 +0.022 +0.013 +0.009 +0.023 -0.009 -0.023 +0.001 +0.070 +0.057
2 +0.016 +0.013 -0.004 -0.012 +0.012 -0.016 +0.026 +0.027 -0.025
3 -0.002 +0.002 +0.009 -0.026 -0.022 -0.015 -0.026 -0.064 -0.002
4 +0.016 -0.010 -0.034 +0.008 -0.027 +0.012 -0.003 +0.002 -0.026
5 +0.003 +0.009 +0.012 +0.023 +0.001 +0.016 +0.004 -0.029 -0.042
6 +0.009 -0.016 -0.014 -0.008 -0.021 +0.012 +0.010 -0.029 -0.060
7 -0.032 -0.040 -0.013 +0.003 -0.002 +0.009 -0.010 -0.018 -0.055
8 -0.062 -0.020 +0.006 -0.009 -0.020 -0.011 +0.002 -0.008 -0.037
With this leveling grid data is really needed to turn ON the auto level bed ? I print most of times at 0.2mm layer height.
