FAQ and Troubleshooting

bCNC is not starting

Do you have latest git master or latest stable version? Do you have all dependencies installed?

My machine sometimes suddenly stops in mysterious way

Do you have unshielded cables too close to each other? Too long USB cable?

bCNC refuses to run my perfectly good g-code

Try different g-code sender and let us know

Connect to motion controller using plain old terminal emulator, eg. Putty on windows, or screen for Linux users: screen /dev/ttyUSB3 115200 (to exit: ctrl+a k y) Paste the commands directly to this window

I think that bCNC sends bullcrap to my motion controller

You can use following command to connect to debug serial traffic. ttyUSB0 is real HW, ttyUSB23 is gonna be new fake device to which you'll connect the bCNC in order to intercept trafic:

interceptty -l /dev/ttyUSB0 /dev/ttyUSB23 | interceptty-nicedump