Wide range of applications needs a safety stop fuction in case of power failure. Its realized by building in an electromnechanical brake on rear side of stepper motor body. Electromechanical brake is activated by internal electro magnet coil, if power on, brake raleases the braking disk and motor is able to normaly operate. In case of power failure electro magnet is power off and internal spring fixes the disk and stops the motor shaft in matter of 30-60ms. Most stepper motors can be quipped with build in rear brake, by use of second motor shaft. Even more advance construction is possible, like using hollow shaft brake and put another second brake over motor body and achive double brake safety system, for applications, that requires double safety.
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To meet the required safety norms for double safety, its possible to use hollow shaft brake with another shaft put on first brake body.
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