I want to use a motor to drive a lead screw that first brings down a platform that locks into place and then controls a secondary platform to apply pressure but using only a single motor.
As an example use two nuts on a linear drive screw. Nut A would contact a physical barrier and not move further while nut B would continue moving until it contacts Nut A. This should be reversible.
I am sure I have seen a similar system on some cnc machines and such but am unable to identify a working mechanical mechanism or model that can accomplish this.
Can anyone identify a system that could perform this or similar mechanism?