Re: "Industrial" Brand CNC router Spindle descends on shut down?
There have been a few large mills and lathes that have done this, I recall one lathe had a very heavy tool changer on the X axis which was mounted vertically, it had a hydraulically operated pin the operated when the power was cut, release the E-stop and re-power the servo's and the pin released.
Otherwise it sank into the bed.
IOW, there is often some kind of method to prevent back feeding of the ball screw.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.