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Speed/velocity control mode in servo drives

Q: I have used only the position control mode only in the servo drive. Can anyone please explain me about speed/velocity control mode in the servo drive, like for the position control mode we will be giving pulse and direction from the external controller, likewise which thing we need to give for speed control mode?

A: Position control in servo motor mean the motor will travel a defined position with some speed. In Position mode u can control both distance & speed by using controller. Position control is used in applications where more accuracy is needed. In Velocity control mode, the speed is controlled by controlling the voltage (0-10V) through external Pot. It is used in a place where controlling is Analog.

For velocity control, you just need to induce an analog signal on the servo drives terminals, and also a zero input command for some brands. This is a lot easier than the position control mode. It's like treating it as an AC variable frequency drive (VFD), only that the servo motor responds more accurately on different speed commands.

In Servo Drive, there is a parameter for selecting one of following option.
1. Speed mode.
2. Position Mode
3. Speed and position mode
When speed and position mode is selected the speed to position control mode can be switched any time by drive input controlled externally.

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