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13. Program Support Functions
13.14 Normal Line Control; G40.1/G41.1/G42.1
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Command format
G40.1 X__ Y__ F__ ;
G41.1 X__ Y__ F__ ;
G42.1 X__ Y__1 F__ ;
G40.1
:Normal line control cancel
G41.1 :Normal line control left ON
G42.1 :Normal line control right ON
X
: X axis end point coordinates
Y
: Y axis end point coordinates
F :
Feedrate
The axis No. for the normal line control axis is designated with the parameter (#1522 C_axis).
Normal line control is carried out in respect to the axis movement direction of the selected plane.
G17 plane X-Y axes
G18 plane Z-X axes
G19 plane Y-Z axes
Detailed description
(1) Definition of C axis turning direction
The C axis angle is 0° (degree) when the tool is facing the +X direction.
The counterclockwise direction turning is + (plus), and the clockwise direction turning is
−
(minus).
(2) C axis turning operation in respect to movement command
(a) Start
up
After the normal line control axis turns to a right angle of the advance direction at the start
point of the normal line control command block, the axis of the selected plane is moved.
Note that the normal line control axis at the start up turns in the direction that is 180° or
less (shortcut direction) in both the normal line control type I and II.
(b) During normal line control mode
1. Block seam
No tool radius
compensation
After the C axis is turned to be at a right angle of the
movement of selected plane in the next block, that block is
moved.
With tool radius
compensation
If tool radius compensation is applied, normal line control is
carried out along the path to which the tool radius
compensation is applied.
2. During block movement
The C axis angle is kept constant during the linear command, and the C axis does not
turn.
During the arc command, the C axis turns in synchronization with the operation of the
arc interpolation.
(c) Cancel
The C axis does not turn, and the axis movement of the selected plane by the program
command is carried out.