@raf said in 4z axis 4 independent motors. Bed Levering:
Current is 2,2A And the controlers have radiators and cooling. BUt when i give 2,4A after 1 hour of working there is a statement that the drivers are to hot.
Have you followed the cooling recommendations at https://duet3d.dozuki.com/Wiki/Mounting_and_cooling_the_board#Section_Cooling ?
Heatsinks on the stepper driver chips might actually make things worse, because they disturb the flow of air along the line of driver chips, and the plastic case of the chips does not conduct heat to the heatsinks very well.