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The FrontParamB property is relevant when a part’s /BasePart/FrontSurface is set to Motor or SteppingMotor and /BasePart/FrontSurfaceInput is set to Constant or Sin. For Constant, it determines the constant rotational velocity of the motor. For Sin, it determines the frequency of the motor’s rotational velocity, using the following formula:

MotorVelocity = ParamB * math.sin(workspace.DistributedGameTime * ParamB)

In no other cases is this property used.

Code Samples

Motor Control

This code sample demonstrates how surface properties can be set using only a NormalId (Top, Front, etc). It switches a motor’s -SurfaceInput from NoInput, Constant and Sin to show how each work using -ParamA and -ParamB properties.