Electric-Driven Clean-Room Robot With Computer-Controlled "Z" Axis
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
This arrangement eliminates the air cylinder actuator that contains lubricated air that dispels oil into the atmosphere. It also provides a computer-controlled "Z" axis. The air cylinder is replaced by a ball screw 13. The casting 10 is modified so that the ball screw 13 can be attached in place of the air cylinder. The stepper motor 14 is attached to the base casting 15 so that gear 16 is affixed to the drive gear at the bottom of ball screw 17. The rotation of stepper motor 14 causes ball screw 13 to rotate a number of turns, as indicated by a computer signal. The length of Z travel can be increased by utilizing a longer quill 18 and a longer ball screw 13.