that was a great write up, thanks for all the time you put into it. That evil backlash! Aside from accuracy, if you want to retaint the ability to cut steel with the mill, with its higher cutting forces, backlash must be eliminated.
then again, with a higher cutting force and 90% screw efficiency how much of an issue is backdriving especially with an efficienct linear bearing and servos instead of steppers? Bit ironic if the system is so efficient friction devices are need to create drag! |