2. Least Command Increments
2.1 Input Setting Units
3
2. Least Command Increments
2.1 Input Setting Units
Function and purpose
The input setting units are, as with the compensation amounts, the units of setting data used in
common for all axes.
The command units are the movement amounts in the program which are commanded with MDI
inputs or command tape. These are expressed with mm, inch or degree (
°
) units.
With the parameters, the command units are decided for each axis, and the input setting units are
decided commonly for all axes.
Linear axis
Parameters
Millimeter Inch
Rotation axis
(
°
)
#1003 iunit = B
0.001 0.0001
0.001
=
C 0.0001 0.00001
0.0001
=
D 0.00001 0.000001
0.00001
Input setting unit
=
E 0.000001 0.0000001
0.000001
#1015 cunit = 0
Follow #1003 iunit
=
1 0.0001 0.00001
0.0001
=
10
0.001 0.0001
0.001
=
100
0.01 0.001
0.01
=
1000
0.1 0.01
0.1
Command unit
=
10000
1.0 0.1 1.0
(Note 1)
Inch/metric changeover is performed in either of 2 ways: conversion from the parameter
screen (#1041 I_inch: valid only when the power is turned ON) and conversion using the
G command (G20 or G21).
However, when a G command is used for the conversion, the conversion applies only to
the input command increments and not to the input setting units.
Consequently, the tool offset amounts and other compensation amounts as well as the
variable data should be preset to correspond to inches or millimeters.
(Note 2)
The millimeter and inch systems cannot be used together.
(Note 3)
During circular interpolation on an axis where the input command increments are
different, the center command (I, J, K) and the radius command (R) can be designated by
the input setting units. (Use a decimal point to avoid confusion.)