@dc42 My replacement for the thermistor is arrived. That solved the problem.
Calibration is now the problem. After setting the trigger height and z0 I wanted to Run Delta calibration. This is going well. But the mesh compansation is not going well : Error: G29: Probe was not triggered during probing move
The nozzle even goes besides the bed? I have in config.g : M557 R95 S10. The bed is 20cm in diameter,
Z probing works fine. If I touch/push bed it gets a z-probe 1000 in stead of 0.
When I test a print it first touches the bed. Then it goes up a bit during moving. Than it touches the bed and then up again. It prints in the air. So the calibration is very wrong.