How to avoid load on Rack&Pinion pneumatic actuators?

1、 Short circuit accidents can be effectively avoided by using fuses or overcurrent relays.

2、 Protect the motor from overload caused by continuous operation or electric operation by using a thermostat.  

3、 Protecting the motor from stalling by using a thermal relay.   

After reading the above content, I believe everyone already knows the method to avoid load on Rack&Pinion  pneumatic actuators .