
2.CONTROLLED AXES PROGRAMMING B-63944EN/02
- 36 -
2.3 INCREMENT SYSTEM
Explanation
The increment system consists of the least input increment (for input)
and least command increment (for output). The least input increment
is the least increment for programming the travel distance. The least
command increment is the least increment for moving the tool on the
machine. Both increments are represented in mm, inches, or deg.
Five types of increment systems are available as indicated in Table 2.3
(a). For each axis, an increment system can be set using a bit from bit
0 to bit 3 (ISA, ISC, ISD, or ISE) of parameter No. 1013.
When IS-D or IS-E is to be selected, the corresponding option is
required.
Table 2.3 (a) Increment system
Name of increment
system
Least input increment
Least command
increment
0.01 mm 0.01 mm
0.001 inch 0.001 inch
IS-A
0.01 deg 0.01 deg
0.001 mm 0.001 mm
0.0001 inch 0.0001 inch
IS-B
0.001 deg 0.001 deg
0.0001 mm 0.0001 mm
0.00001 inch 0.00001 inch
IS-C
0.0001 deg 0.0001 deg
0.00001 mm 0.00001 mm
0.000001 inch 0.000001 inch
IS-D
0.00001 deg 0.00001 deg
0.000001 mm 0.000001 mm
0.0000001 inch 0.0000001 inch
IS-E
0.000001 deg 0.000001 deg
The least command increment is either metric or inch depending on
the machine tool. Set metric or inch to the parameter INM
(No.0100#0).
For selection between metric and inch for the least input increment, G
code (G20 or G21) or a setting parameter selects it.
Combined use of the inch system and the metric system is not allowed.
There are functions that cannot be used between axes with different
unit systems (circular interpolation, cutter compensation, etc.). For the
increment system, see the machine tool builder's manual.
NOTE
1 The unit (mm or inch) in the table is used for
indicating a diameter value for diameter programming
(when bit 3 (DIA) of parameter No. 1006 is set to 1)
or a radius value for radius programming.
2 Some increment systems are unavailable depending
on the model. For details, refer to “Descriptions” (B-
63942EN).