Okuma OSP-P200L Programming Manual page 30

Although the origin of a program coordinate system (program zero) can be set at any position, it is
usually set on the centerline of a workpiece for the X-axis and at the left end face of workpiece for
the Z-axis.
Zm Zp
Zd
Z Z
1 2
Machine coordinate
system
Machine zero
Zero point of encoder
SECTION 2 COORDINATE SYSTEMS AND COMMANDS
Xd, Zd : Output value of position encoder
Xm, Zm : Coordinate values in the machine coordinate system
Program zero
Program coordinate
Xp, Zp : Coordinate values in the program coordinate system
system
Xp
X1, Z1 : Offset amount of position encoder
X
2
X1, Z1 : Offset amount of position encoder
Xm
X
1
Xd
(0: Zero point of position encoder)
(0: Machine zero)
(0: Program zero)
5238-E P-17
LE33013R0300400040001