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13. Program Support Functions
13.14 Normal Line Control; G40.1/G41.1/G42.1
403
Precautions
(1) During normal line control, the program coordinates are updated following the normal line
control axis movement.
Thus, program the normal line control with the program coordinate system.
(2) The normal line control axis will stop at the turning start position at the single block, cutting
block start interlock and block start interlock.
(3) The C axis movement command is ignored during normal line control.
(4) During C axis normal line control (during the G41.1 and G42.1 modal), the C axis workpiece
offset rewrite command (G92C_;) cannot be issued. The program error (P901) will occur if
commanded.
(5) If mirror image is applied to either the 1-axis or 2-axis, the normal line control direction will be
reversed.
(6) Designate the rotation axis for the normal line control axis (parameter (#1522 C_axis)).
Designate so that the axis is not duplicated with the axis on the plane where normal line control
is to be carried out.
If an illegal axis is designated, the program error (P902) will occur when the program (G40.1,
G41.1, G42.1) is commanded.
The program error (P902) will also occur if the parameter (#1522 C_axis) is "0" when these
codes are commanded.
(7) Depending on the model, this function cannot be used.
(8) The movement of the normal line control axis is counted as one axis of number of
simultaneous contouring control axes.
If the number of simultaneous contouring control axes exceeds the specification range by
movement of the normal line control axis, the program error (P10) will occur.
Relation with other functions
Function name
Notes
Uni-directional
positioning
Normal line control is not applied.
Helical cutting
Normal line control is applied normally.
Spiral interpolation
The start point and end point are not on the same arc, so normal line
control is not applied correctly.
Exact stop check
The operation will not decelerate and stop for the turning movement
of the normal line control axis.
Error detect
Error detect is not applied on the turning movement of the normal line
control axis.
Override
Override is applied on the turning movement by normal line control
axis.
Coordinate rotation by
program
Normal line control is applied to the shape after coordinate rotation.
Scaling
Normal line control is applied to the shape after scaling.
Mirror image
Normal line control is applied to the shape after mirror image.
Thread cutting
Normal line control is not applied.
Automatic reference
position return
Normal line control is not applied.
Start position return
Normal line control is not applied on the movement to the middle point
position.
If the base specification parameter "#1086 G0Intp" is 0, normal line
control is applied to the movement from the middle point to a position
designated in the program.
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