Help with CIM motor locking system?

[MAXOFLIFE]

Originally Posted by jojoguy10

I'm pretty sure they are using the Dart Linear Actuators. You can find them on their website: http://dartactuators.com/

Or, on Andymark: http://www.andymark.com/DART-s/540.htm

According to a comment left on the youtube video, a CIM motor powers the arm and controls its angle. Do you know what we would need in order to replicate what they're doing? I was under the impression that this wouldn't work since a CIM motor doesn't lock into place when not power.