If the gantry starts to rack, Leadshine modern stepper drives/AM822, etc../ sense it, stop and emit alarm signal to breakout board so all stops.

Other solution is to clock the 2 ball screws using belt and only one motor.

In reality if you make a precise and sturdy machine with not very wide gantry, one side motor could stop and all continue to move without any problem cause instead of racking the other screw turns by itself. See my first build link below in signature.


So what is your exact problem that needs solving?