
1. CONTROLLED AXES
B–63502EN/01
NC FUNCTION
20
There are two increment systems as shown in the tables below. One of the
increment systems can be selected using a parameter.
Table 1.4(a) IS–B
Least input increment
Least
command
increment
Abbreviation
0.001 mm (diameter programming) 0.0005 mm
Metric input 0.001 mm (radius programming) 0.001 mm
0.001 deg 0.001 deg
0.0001 inch (diameter programming) 0.0005 mm
Inch input 0.0001 inch (radius programming) 0.001 mm
Millimeter
0.001 deg 0.001 deg
machine
0.001 mm (diameter programming) 0.00005 inch
IS–B
Metric input 0.001 mm (radius programming) 0.0001 inch
0.001 deg 0.001 deg
0.0001 inch (diameter programming) 0.00005 inch
Inch input 0.0001 inch (radius programming) 0.0001 inch
0.001 deg 0.001 deg
Table 1.4(b) IS–C
Least input increment
Least
command
increment
Abbreviation
0.0001 mm (diameter programming) 0.00005 mm
Metric input 0.0001 mm (radius programming) 0.0001 mm
Millimeter
0.0001 deg 0.0001 deg
machine
0.00001 inch (diameter programming) 0.00005 mm
Inch input 0.00001 inch (radius programming) 0.0001 mm
0.0001 deg 0.0001 deg
0.0001 mm (diameter programming) 0.000005 inch
IS–C
Metric input 0.0001 mm (radius programming) 0.00001 inch
Millimeter
0.0001 deg 0.0001 deg
machine
0.00001 inch (diameter programming) 0.000005 inch
Inch input 0.00001 inch (radius programming) 0.00001 inch
0.0001 deg 0.0001 deg
The least command increment is in millimeters or inches, depending on
the machine tool. One of them must be selected using a parameter
beforehand.
The least input increment can be switched between metric input and inch
input by using a G code (G20 or G21) or a setting parameter.
1.4
INCREMENT SYSTEM