1-7 Absolute positional accuracy
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Absolute positional accuracy
"Absolute positional accuracy"
The accuracy is measured with measurement comparing with a reference encoder. Rotating one
revolution with the Z signal as the datum point, the difference between the actual measured value at
each positioning point (the position actually moved to from the datum point) and the reference encoder
is found, and the value of (maximum – minimum) is shown as the absolute positional accuracy.
[Reference encoder]
Resolution: 57,600,000 pulse/rev
Absolute positional accuracy: 0.26 arc sec
"Absolute position compensation function"
The uni-directional positional accuracy means the maximum positional difference between the actual
rotated angle from the datum position and its theoretical rotational angle in one revolution when series
of positioning are performed in the same rotation direction.
The "absolute positional accuracy" is shown in the table below:
Model
Item
KDU-13
Absolute positional accuracy
(w/position correction function)
arc sec
10
Actual stop
position
Theoretical
position
Max. positioning
error
360
°
0
°
Z
