Distance control (sensed spindles) (DIST_CTRL)

Syntax:

<axis_name> [DIST_CTRL [ON [ DRYRUN ] [ CONST_DIST ]] | [OFF | CHECK_POS | FREEZE | REF]

                        SET_POS=.. SET_DIST=.. [ KP=.. ] [ I_TN=.. ] [ D_TV=.. ] [ FILTER_TYPE=.. ]

                        [ N_CYCLES=.. ] [ FG_F0=.. ] [ ORDER=.. ] [ SMOOTH_FACT=.. ] [ KALMAN_SIGMA=.. ]

                        [ NO_MOVE ] [ VAL1=.. - VAL5=.. ] { \ } ]

<axis_name>

Name of the axis supporting the tool.

DIST_CTRL

Identifier for the "Sensed spindles” function. Must always be programmed as the first keyword.

ON

Distance control on when workpiece surface is specified. A set position (SET_POS) must be set at switch-on.

CONST_DIST

Activate distance control (ON) when a constant distance to the workpiece surface is specified. A distance must be set with SET_DIST at switch-on. [as of Build V2.11.2804.03]

OFF

Deactivate distance control.

CHECK_POS

Check whether position is within the tolerance window.

FREEZE

Freeze the control distance across the workpiece. The axis position or the output correction value is maintained. Axis tracking is interrupted.

DRYRUN

In combination with ON, the axis is not tracked in DRYRUN mode when there are changes in the workpiece surface. This allows data to be evaluated without feedback from the controller (e.g. filter effect). [as of V3.1.3079.23]

When distance control is activated, a set position must be set with SET_POS if the workpiece surface is specified.

When distance control is activated, a set distance must be set with SET_DIST if a constant distance from the workpiece surface is specified.

REF

Reference measuring system (sensor) (only if there is no absolute measuring system).

SET_POS=..

Specify the workpiece surface in [mm, inch] (absolute position). In the event of reset or program end, the set position is reset, i.e. a new set position must be specified before distance control is reactivated.

SET_DIST=..

Specify the constant distance to the workpiece surface in [mm, inch]. In the event of reset or program end, the distance is reset, i.e. a new distance must be specified before distance control is reactivated.

KP=..

Weighting the distance control output values. Parameterisation can be executed analogous to P-AXIS-00759. The value range is limited to 0.0 < KP <= 2.0. For KP values less than 1.0, the distance control dynamics are reduced; for KP values greater than 1.0, the dynamics are increased.

A KP factor less than 1.0 reduces 1 possible distance control oscillation and steadies control in the event of minor distance errors. [as of V2.11.2809.06 or V3.1.3079.06]

I_TN=..

Integral action time of the PID controller in [s]. The integral action time defines the time after which the P and I components of the manipulated variable are equal. Parameterisation can be executed analogous to P-AXIS-00764. The value range is limited to 0.0 <= I_TN <= 50.0. A large integral action time produces greater control stability. The shorter the integration action time, the greater the I component and the faster the control. A short integral action time excites oscillations more strongly. [as of V2.11.2809.06 or V3.1.3079.06]

D_TV=..

Derivative action time of the PID controller in [s]. The derivative action time defines the time after which the P and D components of the manipulated variable are equal. Parameterisation can be executed analogous to P-AXIS-00765. The value range is limited to 0.0 <= D_TV <= 2.0. The larger the derivative action time, the stronger the D component. [as of V2.11.2809.06 or V3.1.3079.06]

FILTER_TYPE=..

Filter type to filter sensor values according to P-AXIS-00782. [as of V3.1.3079.23]

N_CYCLES=..

Number the measured values used for filtering according to P-AXIS-00413. [as of V3.1.3079.23]

FG_F0=..

Cut-off frequency for the low-pass filter in [Hz] according to P-AXIS-00508. [as of V3.1.3079.23]

ORDER=..

Order of the low-pass filter according to P-AXIS-00507. [as of V3.1.3079.23]

SMOOTH_FACT=..

Smoothing factor of the exponential averaging filter according to P-AXIS-00784. Specifies the weighting of the current measured value.

KALMAN_SIGMA=..

Uncertainty of the included measured values according to P-AXIS-00783. [as of V3.1.3079.23]

NO_MOVE

By default, the resulting correction offset is deactivated when distance control is switched off. This motion can be suppressed by specifying NO_MOVE in combination with OFF. The channel is initialised with the changed axis position. The position offset is only deactivated at the next axis motion programmed in the NC program.

VAL1=..-VAL5=..

Five freely assignable values in real format.

\

Separator ("backslash") for clear programming of the command over multiple lines.