heatbed tests results for marlin G29 T command by akajes

Last crawled date: 4 years, 1 month ago

After some troubles with printing large objects,
I decided to test my Aluminium HeatBed - and what I see - it bended :(
I use Marlin firmware https://github.com/MarlinFirmware/Marlin
it has ability to use various probes for detection minimal z position,
and best for my mind is an inductive detector LJ18A3-8-Z/BY
after seeking I found G29 T parameter wich can show z points on heatbed
it dumps to console like this vertices and finaly bed matrix
sample rezult for command G29 T P4Bed Height Topography:
(0,0)
+0.45269 +0.28469 +0.24969 +0.21869
+0.23169 +0.08469 +0.03069 +0.03069
-0.14031 -0.18531 -0.13931 -0.08631
-0.28531 -0.29631 -0.27331 -0.17731
Bed Level Correction Matrix:
+1.000000 +0.000000 -0.000466
+0.000002 +0.999993 +0.003821
+0.000466 -0.003821 +0.999993
You can insert your results to this code and check your heatbed
I found another tool for visualizationhttp://www.maui-3d.com/cgi-bin/plotG29
https://people.sc.fsu.edu/~jburkardt/cpp_src/hermite_cubic/hermite_cubic.htmlhttps://people.sc.fsu.edu/~jburkardt/m_src/hermite_cubic/hermite_cubic.html