
B–63833EN–1/02
14. MEASUREMENT
859
(0,0)
+Z
–EXOFS
Z
OFS
X
OFS
Z
Zt
+X
Measuring tool nose
position at the mechani-
cal machine position
Machine
zero point
Workpiece coordinate
system zero point
(programmed zero point)
EXOFSz : Workpiece coordinate system shift amount to be set
OFSz : Tool geometry offset value
Zt : Mechanical coordinate value (Distance to the workpiece end face)
Setting of workpiece coordinate system shift amount
To deviate the programmed zero point of the workpiece coordinate
system from the workpiece end face, such as by adding a cutting
allowance, use the incremental input of the workpiece coordinate
system shift amount in MDI operation. By setting the distance from
the programmed zero point to the workpiece end face with a sign, the
numeric value input is added to the preset amount.
EXOFS
Z
(NEW)
+X
W
+Z
EXOFS
Z
(OLD)
Cutting
allowance
Imaginary zero point
Workpiece coordinate system
programmed zero point
EXOFS
Z
(OLD) : Workpiece coordinate system shift amount being set by the
function of input of tool offset value measured B
W : Cutting allowance (incremental input value)
EXOFS
Z
(NEW) : Workpiece coordinate system shift amount after adding the
cutting allowance.
Setting of cutting allowance