Hello,
I have a big problem. When I turn on the machine morning, after a few minutes make a Gross Positioning Error Z 3D... . This problem starts appear when my eletronic man remove a card from my machine. Then the axis make a quite buzzing. It is not a potentiometr, becouse I set it in optimal position.
Sometimes after gross positioning error, when I turn on machine again machine show "XYZ axis not ready for operation". When the machine is hot this problem not shown again.

i found it in manual, but I do not want change a parameter in MP for bigger value. I would like to find where is the problem. Somebody can help me?

In attachment is the page from manual.