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The file $MACHINE.DAT (continued)
15 of 91
Maschinendaten 12.0400 en
2.1.10 $RAT_MOT_AX[ ]
Motor/axis gear ratio
Data type
frame
min
Value
15
Unit
[ ]
Value
max ----
Assignment
[1] axis 1 ... [6] axis 6
[7] external axis 1 ... [12] external axis 6
In order to calculate the resolution, the gear ratio of the motor to the axis must be specified
for each axis. This information is entered as a fraction. The direction of rotation of the axis
can be changed by means of a negative sign in the numerator N.
$RAT_MOT_AX[i]={N x,D y}
i = axis number
x = value of numerator N (i.e. motor)
y = value of denominator D (i.e. axis)
Unit for linear axes: [Number of motor revolutions per 1000 mm travel]
Example 1
Rotational axis with gear unit:
Every 10th motor revolution, the axis turns through 1 revolutions.
$RAT_MOT_AX[i]={N 100,D 1}
Example 2
Linear axis:
I
compl
= complete reduction ratio of the gear unit
I
box
= reduction ratio of the gear box
D
= reference diameter of the gear [unit = m]
I
compl
=
1
(
π
⋅
D
)
⋅
i
box
The gear ration should be at least {N 15,D 1}.
