Auto Z axis adjustment during operation

Hello,

I have a custom CNC machine that works pretty good up to +/- 5 thou. The only thing is that it's a mixture of wood and metal (my next build will be full metal), the bed of the machine is wood and from 0 X to 13 X (inches across) there is a +/- 40 thou difference in height. I was wondering if there is a way to calibrate LINUXCNC so that if you know the height different from the zero point of X and the height difference at the full bed travel, then linuxcnc can auto adjust the the Z height during run operation.

This has come up before.
However what I do with a wood bed is set up light milling passes and run over the entire bed so that the bed is flat and true.

Rick G

Thanks, I knew there was something. I'll look into all your suggestion to see which would fit for me.

Thanks.

Here you can find a solution www.linuxcnc.org/index.php/english/forum...y-error-compensation
It works if the flatness of the bed is good