I am looking at rebuilding my robot for CNC tending but was wondering if there is a way to stop the robot from going floppy when the Emergency stop is hit as this can cause problems. Most industrial robots have electro mechanical breaks and absolute position encoders is there a reason not to use motors with brakes on them.
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Implementing relays to close or short the stepper motor circuits/coils when power is lost is a practical solution to control the motion of a vertical slider, preventing it from free-falling and ensuring it glides down slowly instead. You can try the same method with the ar4...