
A-79348E
Title
Draw
No.
5/88
page
FANUC Series 30i-MODEL A
Tool center point control
for 5-axis machining
Ed. Date Design Description
Date Jan.16.’04 Design. Apprv.
When a coordinate system fixed on the table is used as the programming
coordinate system, programming can be performed without worrying about
the rotation of the table because the programming coordinate system does
not move with respect to the table, although the position and direction of the
workpiece fixed on the table change due to its rotation. When a straight
line is specified, the tool center point moves along a straight path with
respect to the workpiece as instructed. (See Fig. 1.1 (b).)
By setting the relevant parameter, the workpiece coordinate system can also
be employed as the programming coordinate system. In this case, as the
table turns, the position and direction of the workpiece fixed on the table
change with respect to the programming coordinate system. It is therefore
necessary to take into account the rotation of the table when specifying the
end point. In this case, too, when a straight line is specified, the tool center
point moves along a straight path with respect to the workpiece as instructed.
Fig. 1.1 (c) illustrates how linear interpolation is accomplished with a mixed
type machine, showing the relationship between the case when a table-fixed
coordinate system is used as the programming coordinate system and the
case when the workpiece coordinate system is used.
If linear interpolation is specified in this function mode, speed control is
exerted in such a way that the tool center point moves at a specified speed
with respect to the workpiece.