
1.
INTRODUCTION
(c) Incremental coordinate values
Specify the distance from the previous tool position to the next tool position.
B(25,lO)
X
Specify the tool movement from point A to point B as
G91X20.OY - 20.0;
(3)
Cutting speed -----
Spindle function (See l-9)
Workpiece
follows:
The speed of the tool with respect to the workpiece
when the workpiece is cut
is called the cutting speed.
As for the CNC, the cutting speed
unit.
can be specified by the
spindle speed in rpm
For example, when a workpiece
having a diameter of 100 mm should be
machined at a cutting speed of
80 mm/min, the cutting speed in rpm unit is
calculated to be approx. 250 rpm from N = 1000 VlnD. Therefore, specify the
following: S250;
Spindle speed command is called spindle speed function.
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