Best posts made by spllg

@SteveYYC adding ;e to the g1-line has answered my question #1. thanks again.

@oliof that' what i'm already considering but eve if the rpi will be bootable from usb after it refuses booting from sd card this will not cure the root cause of my issue.

@Danal i do not have a z-endstop mounted near the nozzle - i don't hav a z-endstop at all.

dc42's hint solved my issue.

@SteveYYC

1. inserted m80 into config.g and i did not (yet) observe the absence of the atx control box. having an eye on it.

2. i had 'G1 X0 Y0 Z75 f1000' at the end of my print file. added ';e' and now the correct total number of layers is displayed.

thanks for your help.

@spllg no, it's not correct - https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Mainboard_6HC_Hardware_Overview : Alternatively, the SBC can provide 5V for the Duet using the "SBC -> 5V" jumper. Note that the Duet's in-built protection is bypassed. In this case the "5V->SBC" and the "SBC->5V*" jumpers should both be fitted, but remove the jumper from "Int 5V EN".

i have jumpered it accordingly and hopefully my rpi will survive with this configuration.

@CaLviNx i could operate the rpi using 5v-power from the duet but i would loose the ability to switch off duet's psu when the print has finished.

if you still cant work it out I would be willing to purchase the secondhand board from you

seems you are looking for a cheap board.

are obviously unable to operate it properly.

ok, it seems, i am unable to operate it correctly after i was able to do so for 4 monthts. wondering what the change could be.

i understand: i'm on my own!