Quote:
Originally Posted by matthewdenny
Does anyone know how much torque it takes to back drive an unpowered cim motor? Does it mater if it is connected to a speed controller or not if the motor is programmed to 0?
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It doesn't take very much to backdrive an unpowered CIM at low speed. To get the motor going quickly takes some more torque.
This information isn't on the datasheet.
If the speed controller is in brake mode and it receives a command of zero, it will short together the motor output. The current generated by the motor works to oppose the rotation of the shaft making it harder to backdrive. If the speed controller isn't in brake mode, it won't affect the CIM at all when it is command to zero power.
What are you looking to do with a CIM motor?