ServoMotor

This simulation component emulates the behavior of a servo motor.

When to use

Use this simulation component if you want to emulate the behavior of a servo motor. It generates a position and speed output whose values are computed according to a configurable acceleration time and maximum speed.

For example, you can use this simulation component to move an axis by speed.

How to use

Add this simulation component from the simulation component library.

Set the MaxSpeed, AccelerationTimeOverride, SpeedOverride and IsMotorEnabled inputs. If there is no PLC available to control the motor, you could use f.e. the DoubleConstant or BoolConstant simulation component to set constant values.

Decide whether the positioning should be started after the target position changes by setting the StartPositioningOnTargetChange property or on a positive edge of the StartPositioning input.

Depending on the setting you have chosen before, you only need to set a new TargetPosition input or additionally activate the positioning by triggering the StartPositioning input to start the positioning process.

Note

The servo motor will only start positioning if the simulation is running.

Parameters

AccelerationTime

A value indicating the time needed to reach the maximum speed, starting from zero.

JoggingSpeed

A value indicating the jogging speed in m/s.

PositioningMode

A value indicating how the target position is interpreted.

InitialPosition

A value indicating the initial position of the motor.

Note

This value takes effect after reset.

StartPositioningOnTargetChange

A value indicating whether positioning should be started after the target position changes or not - therefore the StartPositioning input must be set to True. If StartPositioningOnTargetChange is not activated, positioning is started on a positive edge of the input StartPositioning.

Inputs

AccelerationTimeOverride

An input indicating the override of the acceleration time. The used acceleration time is AccelerationTime/AccelerationTimeOverride.

IsMotorEnabled

An input indicating whether the servo motor is allowed to move or not. If this input changes to False the current positioning process stops until the input is reactivated again.

JogNegativeDirection

An input which starts jogging the motor in negative direction. Used speed is defined JoggingSpeed.

JogPositiveDirection

An input which starts moving in positive direction. Used speed is defined JoggingSpeed.

MaxSpeed

An input indicating the maximum speed.

SpeedOverride

An input indicating the override of the maximum speed. The used maximum speed is SpeedOverride * MaxSpeed.

StartPositioning

An input which starts positioning on positive slope.

TargetPosition

An input indicating the target position of the servo motor.

Outputs

CurrentPosition

An output indicating the current position.

CurrentSpeed

An output indicating the current speed.

IsMotorStopped

An output indicating whether the servo motor is not moving or is.

IsPositioningActive

An output indicating whether the servo motor is moving to the target position or not.

IsTargetPositionReached

An output indicating whether the target position is reached or not.

Example

In this example, an axis is fully controlled by a PLC with help of the PLCConnector simulation component as seen in the picture below.

The 3D object of the servo axis is moved by the KinematicTranslationMover simulation component which is connected to the CurrentPosition output of the ServoMotor simulation component.

In the following video you can see another example of using the ServoMotor in combination with the KinematicTranslationMover simulation component.

Further Information

For more details visit the Video Guides section, where you can find a video guide demonstrating this topic under How to control conveyor belts.