13, can stepper and servo motors be dismantled for overhaul or modification?

No, it's better to let the manufacturer do it. It's difficult to install the machine back to its original state without professional equipment. The gap between the rotor and stator of the motor can not be guaranteed. The properties of magnetic steel materials are damaged, even causing loss of excitation, and the torque of motors is greatly reduced.

14, is the servo controller able to perceive changes in external loads?

If a resistance is encountered, stop, return or maintain a certain thrust follow up.

Mark

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