I have a chinese 16w Laser Engraver which came with Benbox to install which worked initially with NANO(324p)/LX-Nano with a CH340 chip but now the command buttons will only move the Y axis one way or ...

Tips: Refocus the laser if height of sample changes (or if it gets out of focus) Make sure the entire run is on one screen. If not, adjust seconds/div to be higher. (Also adjust number of samples to ...