
Movement to the position specified by the G43.4 block does not constitute tool center
point control. Only tool length compensation is performed along the tool axis direction.
Because the specified speed is usually the speed in the tangent direction of the arc,
the speed of the straight line axis, when seen from the table coordinate system, is:
arc theofLength
axis linestraight theofLength
×F
.
Depending on parameter RHT (No.1407#4), the specified speed varies as shown in
the following table.
RHT (No.1407#4)
0 1
Tangential speed of the arc Synthetic speed of the straight line
axis speed and tangential speed
While the rotation axes are moving, the CNC controls the control points so that the
tool center point moves helically with respect to the table (workpiece). The end of
the tool center point comes to the point specified on the programming coordinate
system.
CAUTION
Any command that does not move the tool center point with respect to
the workpiece (one that moves the rotation axes only) must be
executed in G00 or G01 mode.
B-63534EN/02-05
Edit
Apprv. Desig.
Sheet
Title
Draw
No.
Date
Design
Description
Date
FANUC Series 16i/160i/160is-MB,18i/180i/180is-MB5,
18i/180i/180is-MB OPERATOR’S MANUAL
Concerning the addition of TOOL CENTER POINT
CONTROL FOR 5-AXIS MACHINING
Oct.27.2003
T. Horie
15/15