In some points of bed, i have hard taps when usin PPO...
Some days ago... i changed config.g.... seems the same, but no. Steps for mm, was changed... This caused that head dont move spected, causing hard taps, and problems with prints, as after 20 layers, nozzle touch printed...
Recalibrate steps for mm.
The method used.... bufff. Someone knows how calibrate of precise maner?
The deployprobe and retractprobe files should not be there if your Duet had firmware 1.19 installed when you received it; but if it had an earlier firmware version, they will have been on the SD card as shipped.