Centroid Community CNC Support Forum

I have a Centroid Allin1DC on my milling machine. It's an old prototrak mill with DC servo motors that I retrofitted. I was commenting to someone how one of the nicest things about the Allin1DC system is that I can turn off my servo motors and crank the table around in Bridgeport mode, and use it pretty much like a prototrak mill for prototyping operations.

Then the question arose what happens to the power I generate when I crank the handles? After all motor becomes a generator so where does that DC current go? Is it safe to crank the handles around and run with the servo motors off and only turn them on when I want to use the CNC portion of the mill? So far I've had no problems doing it but is the system designed to dissipate back fed power?

Yes, it is okay to do that.

I am fairly certain that, with power released, the Allin1DC essentially disconnects the motor, so there is no energy to absorb.

But, even if it were in a dynamic braking mode (and you would know that when you tried to turn the cranks) the drive should still be able to dissipate anything you can generate by hand.