Hello, I have a general question that I couldn't find precise answer anywhere.
When Servo Motor power cables are connected to driver (in powered off state) it is not easy to move the motor manually by hand. When power cables are disconnected form driver, It is much easier to move the motor by hand.
Question: What makes the motor harder to move byhand when power cables are connected to driver given there is no live power to driver/motor?
What do you mean by "driver" here?
Are you saying that just having wires connected (no power or signals) to your servo makes it more difficult to move than not have wires connected?
When the motor of the servo is turned by hand it acts as a generator.
If the servo is not connected, a voltage will be generated, but no current will flow.
When the servo is connected to the circuit, there must be some path for current to flow. Because you are now generating a current it takes more effort to move.
You have to do work to generate the current.
John, Thank you so much for the answer this is by far the best explanation I have gotten on this subject
you can say controller. it is the device to which encoder and motor power cables
Thats correct.
If you have a small DC motor, try attaching a small flywheel to the shaft, and give it a spin.
Now short out the power leads, and try the same thing.
The wheel will spin for a much shorter time with the leads shorted than with the leads open.
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