TRC option STRETCH_FACTOR

STRETCH_FACTOR<expr>

This parameter can influence the bypass strategy with acute outside corners. The parameter value determines the maximum block stretch. The length is dependent of the tool radius used.

The parameter only affects outside corners with a transition angle greater than 270 degrees.

Value

Meaning

1-9

Factor for possible block stretch
Default value: 1.

Notice

notice

If the STRETCH_FACTOR is programmed as less than 1 or greater than 9, a warning P-ERR-22007 is output and the default value is set.

Notice

notice

With highly pointed outside corners and large STRETCH_FACTOR selected, block stretch may be very large.

Extreme block stretches are possible as well as possible overshoots of the software limit switch with corresponding error messages (P-ERR-120002/P-ERR-120003)

The option behaviour is illustrated by means of examples of block transitions linear-linear and circular-circular. The function can also be used for linear-circular and circular-linear transitions.

%stretch_test1.nc
N010 G139 G25
N020 V.G.WZ_AKT.R = 5

( Use default value )

N040 #TRC[STRETCH_FACTOR= 1 ]
N080 G0 X0 Y0 Z0
N090 G41 F10000
N100 G1 X10 Y20
N110 G1 X35 Y30
N120 G1 X30 Y20
N130 G1     Y10
N140 G40
N150 G1 X20 Y0
N160 G0 X0 Y0
N180 M30

%stretch_test2.nc
N010 G139 G25
N020 V.G.WZ_AKT.R = 5

N040 #TRC[STRETCH_FACTOR=2 ]
N080 G0 X0 Y0 Z0
N090 G41 F10000
N100 G1 X10 Y20
N110 G1 X35 Y30
N120 G1 X30 Y20
N130 G1     Y10
N140 G40
N150 G1 X20 Y0
N160 G0 X0 Y0
N180 M30

%stretch_test3.nc
N010 G139 G25
N020 V.G.WZ_AKT.R = 5

N040 #TRC[STRETCH_FACTOR=3 ]
N080 G0 X0 Y0 Z0
N090 G41 F10000
N100 G1 X10 Y20
N110 G1 X35 Y30
N120 G1 X30 Y20
N130 G1     Y10
N140 G40
N150 G1 X20 Y0
N160 G0 X0 Y0
N180 M30

%stretch_test4.nc
N010 G139 G25
N020 V.G.WZ_AKT.R = 5
( Use default value )

N040 #TRC[STRETCH_FACTOR = 1 ]
N080 G0 X0 Y0 Z0
N090 G41 F10000
N100 G1 X10 Y20
N110 G2 X35 Y30 R50
N120 G3 X25 Y15 R40
N130 G1     Y10
N140 G40
N150 G1 X20 Y0
N160 G0 X0 Y0
N180 M30

%stretch_test4.nc
N010 G139 G25
N020 V.G.WZ_AKT.R = 5

N040 #TRC[STRETCH_FACTOR = 3 ]
N080 G0 X0 Y0 Z0
N090 G41 F10000
N100 G1 X10 Y20
N110 G2 X35 Y30 R50
N120 G3 X25 Y15 R40
N130 G1     Y10
N140 G40
N150 G1 X20 Y0
N160 G0 X0 Y0
N180 M30

If the STRETCH_FACTOR is further increased with the current geometries, the parallel path does not change. The corner point is used as with factor 3.