@ErlerPrint3D my recommendation is to use the Duet3D magnetic encoder instead of quadrature encoders. That way you can calibrate each motor individually, before fitting the belts that couple them together; and you won't need to execute a tuning move each time you power up. The magnetic encoder also has much higher resolution that quadrature encoders.
I removed the stepper driver from board (but I used a small side cutter) und the Wifi is now stable.
With M569 P3 R-1 i disabled the driver and now i get no more error message.
Thanks for your help
The motors are moving and I'm so happy. Thank you for your help.
Perhaps in your documentation you could give a short explanation of the different manufacturers' labels, so that nobody else makes this mistake.
Bye.