Programmable additional options of TRC

The following command permits the programming of additional optional TRC functions.

Notice

notice

After selection, these optional TRC functions remain active up to main program end or RESET, but they can also be deselected at any time while the NC program is running.

TRC [ [ CONV_CIR_TO_LIN<expr> ] [ KERF_MASKING<expr> ] [ REVERSE<expr> ]

        [ IGNORE_CONT_DAMAGE<expr>] [ REMOVE_MASKED_BLOCKS <expr> ] ]

       [EXT_ANGLE_BLOCK_INTERSECTION<expr>] ]

CONV_CIR_TO_LIN<expr>

In circular blocks in which the tool radius is greater than the programmed radius of the circle element, this parameter converts the circular block directly into linear blocks. The effectiveness of this function is dependent on whether contour masking processes are active (G141).

Value

Meaning

0

No conversion of circular blocks (default).

1

Conversion of circular blocks into linear blocks.

KERF_MASKING<expr>

This parameter explicitly selects the masking of kerfs.

Value

Meaning

0

Kerf masking deactivated (default).

1

Kerf masking activated.

Notice

notice

When contour masking is used, this TRC option is implicitly activated and/or deactivated.

The functionality of kerf masking is based on offsetting a programmed point as soon as the program detects that a kerf cannot be traversed by a tool.

Illustration of kerf masking
Illustration of kerf masking

REVERSE<expr>

This parameter permits the direct change (G41<->G42) of selection side with reversing motions when TRC is active.

Value

Meaning

0

Direct change of selection side deactivated (default)

1

Direct change of selection side activated

The change of selection side of TRC always takes place at the point of reversal. With linear blocks, this is dependent on exactly reversing motions.

With circular blocks, the tangents of both circles must be identical at the point of reversal and the directions of both circles must be different.

IGNORE_CONT_DAMAGE<expr>

This parameter explicitly ignores contour violations.

Value

Meaning

0

Contour violations not ignored (default)

1

Contour violations ignored

REMOVE_MASKED_BLOCKS<expr>

This parameter deletes contour loops detected by contour masking. Pure motions of tracking axes are retained. From the viewpoint of TRC, this also includes a motion of the 3rd main axis. main axis.

The parameter is specially suited for contours with very short blocks. Effectiveness is dependent on whether contour masking is active (G141).

Value

Meaning

0

Closed contour loops are not deleted (default).

1

Closed contour loops are deleted.

EXT_ANGLE_BLOCK_INTERSECTION<expr>

This parameter changes the limit of the transition angle between two motion blocks from 180° to 181°. This avoids the creation of additional TRC transition blocks in this angle range.

The value of the limit itself cannot be modified.

Value

Meaning

0

Limit of transition angle is 180° (default)

1

Limit of transition angle is 181°

Programing Example

prg_example

Conversion of circular blocks:

N1000 V.G.WZ_AKT.R=1     (Tool radius)

N2300 G140    (Deactivate contour masking))

....

N2450 #TRC [CONV_CIR_TO_LIN=1]     (Activate option)

N2500 G41    (Select TRC left of contour)

...

(Circular element with radius less than tool radius)

N2550 G03 X3557.83 Y-577.61 I0.00 J0.60

(no direct conversion to a linear block)

...

N3000 G141               (Activate contour masking)

...

(Circular element with radius less than tool radius)

N3550 G03 X3557.83 Y-577.61 I0.00 J0.60

(direct conversion to a linear block)

...

N3600 G40                (Deselect TRC)

Programing Example

prg_example

Direct change of selection side:

N090 G90

N100 #TRC[REVERSE=1]

N110 G00 X0 Y0

N120 G01 X100 Y100

N130 G41 G01 X150   (Select TRC left of contour)

N140 G01 X250

N150 G01 Y200       (Reversal point)

N160 G42            (Change selection side, now right of contour)

N170 G01 X100

N180 G01 X100 Y150

N160 G40 G01 X0

N170 G01 Y0

G236_LIN<expr>

This parameter defines whether a linear or a circular transition block is integrated when the selection/deselection method G236 is active. This parameter only acts within the angle range between 90° and 180°C when TRC is selected or deselected.

Value

Meaning

0

A circular transition block is integrated at selection and deselection. (default)

1

A linear transition block is integrated at selection and deselection.