HEIDENHAIN MANUALplus 620 Technical Manual page 894

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6.16.19 Power and torque limiting

Settings in the configuration editor

ParameterSets

[Key name of the parameter set]

CfgServoMotor

motEncCheckOff – Bit2

The parameter object CfgServoMotor is not required for:

Virtual axes (MP_axisMode = Virtual)

Axes that are for display only (MP_axisMode = Display)

Analog axes (MP_axisHw = Analog)

You can limit the power of your spindle motor to achieve wider gear ranges.

Wide-range motors are characterized by a larger speed range with higher

torque at low speed.

One solution for bringing about this behavior is to use an oversized motor, and

to limit the maximum power. However, power limiting does not reduce the

high torque to the speed at which power limiting becomes effective. This high

torque (until power limiting takes effect) can be reduced with torque limiting,

in order to keep the mechanics of the machine from becoming overloaded.

With torque limiting you can also limit the torque of the axis motors, in order

to keep the mechanics of the machine from becoming overloaded. Power

limiting is not useful for axis motors.

For axes and spindles, the torque is limited to the value taken from either the

table of power modules or the motor table, whichever is lower.

On supply units where the ERR.IZ.GR signal is available, the power is limited

via MP_motPMax in case of error.

HEIDENHAIN recommends activating this monitoring function (not with

The torque can be calculated for any speed:

--------------- -

M: Torque [Nm]

P: Power [W]

n: Speed [min

The power and torque limiting can have an effect on the braking of the

spindle in an emergency stop.

HEIDENHAIN Technical Manual MANUALplus 620