
OPERATION
B–63534EN/02
11. SETTING AND DISPLAYING DATA
1065
The base measurement surface for this definition is located at the
workpiece coordinate system origin. Because the tip of the reference
tool is also located at the workpiece coordinate system origin, distance
L from the reference tool tip position to the base measurement surface
is 0. Set, therefore, 0 in the parameter for distance L (No. 5022). The
actual measurement surface is usually the same as the base
measurement surface, located at the workpiece coordinate system
origin. If, however, the measurement surface is the top surface of the
reference block, or if the workpiece coordinate system origin is located
on other than the top surface of the workpiece (for example, when the
origin is shifted from the workpiece top surface by an amount equal
to the cutting allowance), set the distance from the base measurement
surface to the actual measurement surface as Hm, such that the tool
length offset (OFSL) can be calculated using the same formula as that
used for definition 1.
Workpiece
Tool
T01
Tool
T01
Measurement
surface
Machine
zero point
Zm
OFSL
Zm
OFSL
Hm
Workpiece coordinate
system origin
(base measurement
surface)
Hm
Reference block
L : Distance from the reference tool tip position to the base measurement surface (= 0)
Hm : Distance from the base measurement surface to the actual measurement surface
Zm : Distance from the tip of the tool to be measured to the measurement surface when the
tool is positioned to the machine zero point
OFSL : Tool length offset (OFSL = Zm – Hm – L)
Machine table Machine table
Measurement
surface