Specifications

14.2

Servo control

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7. When the MD3030 value is determined, set the speed loop integration time constant

MD3030 (Pn101) as follows:

• MD3030 = 2000000/(MD3030

)

• Be sure to set speed loop integration time constants to the same value among the interpolation

axes; otherwise, processing accuracy is affected.

• If a low frequency vibration is produced when you use this function, use torque filters or torque

reference notch filters instead.

14.2.8 Predictive control

To use predictive control for cutting feed and positioning, set the following machine data

and parameters.

Predictive control having been enabled with the following settings may become active/inac-

tive in the following cases:

• Predictive control for cutting feed: Always active during programmed operation except

during rigid tapping.

(Predictive control becomes inactive during rigid tapping because the Spindle and servo

gain are to be equal each other.)

• Predictive control for positioning: Always active for positioning during RAPID, JOG,

and programmed operations excluding during handle or step feed operations.

(During handle and step feed operations, predictive control becomes inactive.)

For procedures how to set predictive control, refer to a separate manual.

If model following control is used for positioning, disable predictive control.

 CNC setting

For feed axis

• MD37610 PROFIBUS_CTRL_CONFIG (For each Servo axis)

Meaning: CNC feed mode transmission to a drive

Setting value: 0 --- Disabled

1 --- Enabled

Assign "1" (Enabled) to this parameter if the predictive control is used.

Note: Set this parameter to "Disabled" for Spindle; otherwise, you cannot

change over Spindle drive parameters (DBX21.0-2) from PLC.

INFO