My "fill in" project for the summer has been a ball screw and air cylinders for my knee on the Excello CNC mill. Still got several parts to fabricate but I was close enough to fit it all together today to check for problems.
I found a good one. Drop the air and power to servo and the table drops like a rock. I knew it would go down, but the speed was totally unexpected. I'm going to need to add some sort of "dead man" brake to the servo. That is, drop power and the brake closes.
Any good suggestions for what to use? Keep in mind I'm a cheap skate.
Karl