
PROGRAMMING
B–63684EN/01
1. GENERAL
15
The positional relation between these two coordinate systems is
determined when a workpiece is set on the table.
The tool moves on the coordinate system specified by the CNC in
accordance with the command program generated with respect to the
coordinate system on the part drawing, and cuts a workpiece into a shape
on the drawing.
Therefore, in order to correctly cut the workpiece as specified on the
drawing, the two coordinate systems must be set at the same position.
When a workpiece is set on the table, these two coordinate systems lay
as follows:
The tool moves on the coordinate system specified by the CNC in
accordance with the command program generated with respect to the
coordinate system on the part drawing, and cut a workpiece into a shape
on the drawing.
Therefore, in order to correctly cut the workpiece as specified on the
drawing, the two coordinate systems must be set at the same position.
To set the two coordinate systems at the same position, when setting a
workpiece to be machined to general turret punch press, the workpiece is
held by the workpiece holders after positioning it by applying the end face
of the workpiece to the end locator and workpiece holders mounted on the
machine as illustrated below.
Workpiece
Y
X
End locator
Workpiece holder
Face A
Face B
Generally, the distance between the reference point and the and locator as
well as the distance between the reference point and the workpiece holders
are intrinsically determined according to machines, and they are separated
from each other by a fixed distance.
D Methods of setting the
two coordinate systems
in the same position