
B–63832EN/01
17. MEASUREMENT FUNCTIONS
NC FUNCTION
185
This is a function of setting an offset value by key-inputting a workpiece
diameter manually cut and measured from the MDI keyboard.
First the workpiece is cut in the longitudinal or in the cross direction
manually. When a button on the machine operator’s panel is pressed upon
completion of the cutting, the work coordinate value at that time is
recorded. Then, withdraw the tool, stop the spindle, and measure the
diameter if the cutting was on the longitudinal direction or distance from
the standard face if it was on the facing. (The standard face is made as Z
= 0.) When the measured value is entered into the offset number desired
plus 100, NC inputs the difference between the input measured value and
the coordinate value recorded in NC, as the offset value of the offset
number.
The work coordinate system can be shifted using the technique of directly
inputting the measured value for offset. This technique is used when the
coordinate system planned in the program does not match with the
coordinate system set by the G92 command or by the automatic
coordinate system setting.
The procedures are the same as those for direct input for offset, except a
difference of using the standard tool.
xX
z
Z
α
β
O
O’
B face
A face
X-Z:Coordinate system planned in the program
x-z : Coordinate set actually
Reference point
planned in the program
Cut A or B face and measure β or α. Direct input the measured value.
17.8
DIRECT INPUT OF
TOOL
COMPENSATION
MEASURED VALUE/
DIRECT INPUT OF
WORKPIECE
COORDINATE
SYSTEM SHIFT
AMOUNT (T series)
T series