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From electromate.com
Recommendations: This problem occurs due to the DC Bus Capacitor within the drive or amplifier holding the bus voltage after power is no longer applied. It still could take several seconds for the Capacitor to dissipate it's voltage through the motor which causes the motor to turn. What you need to do to stop the motor from turning is to connect a regen resistor to the drive and put a electromechanical brake on the motor. Some drives have accommodation for wiring an external resistor. The motor brake is controlled by the drive's fault output energizing a SPDT Normally closed contact which will open and engage the motor brake but the voltage stored by the Capacitor still needs to go somewhere and this where the regen resistor would be used. When the E-Stop is pressed the drive is disabled via the inhibit signal and the motor brake engages stopping the motor immediately, and the DC Bus voltage is routed through the regen resistor. Products & Services
Resistors and potentiometers are passive electronic components that oppose the flow of either alternating current (AC) or direct current (DC).
Stepper motor drives power unipolar and bipolar stepper motors in full step, half step, and microstep motion control applications.
Electric brake and clutch assemblies consist of elements for both the connection and disconnection of shafts (clutch) and for the slowing or stopping of shafts (brake) in equipment drives.
Hydraulic brakes are assemblies consisting of elements for the slowing or stopping of shafts in equipment drives.
Brake controllers are used to control braking systems. They can simply engage and disengage the brake, or control the speed of engagement, breakaway torque, and other variables.
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