Well the stepper motors aren’t very strong, so if there is any obstruction it will just stop moving. But the laser head itself is very securely mounted to the c

Well the stepper motors aren’t very strong, so if there is any obstruction it will just stop moving. But the laser head itself is very securely mounted to the carriage, which is very securely mounted to the gantry. I guess it’s possible the gantry could tip, though I’ve never seen that. Otherwise I don’t expect the laser would ever really change orientation. Someone could do some testing to see how hard it would be to tip the gantry. But again, the stepper motors aren’t very powerful. And I’ve accidentally kicked the gantry when forgetting to step over it and it stayed seated. Also you can make the gantry runners arbitrarily wide, at the loss of some Y axis travel. But you can also make the Y axis arbitrarily long. So if you have space to extend things, you could make the gantry runners wider to give it even more stability against tipping. (A problem I have so far never observed)