
B-65270EN/05 4.SERVO FUNCTION DETAILS
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(Example)
When the αi Pulsecoder is used with a tool travel of 10
mm/motor revolution (1 µm/pulse)
10
1000
=
Denominator
Numerator
Conversion
oefficient
1,000,000
)(
1
=
100
1973 (FS15i)
Dual position feedback primary delay time constant
2080 (FS30i, 16i)
[Setting value] Set to a value in a range of 10 to 300 ms or so.
[Unit of data] msec
Normally, set a value of around 100 msec as the initial value. If
hunting occurs during acc./dec., increase the value in 50-msec steps. If
a stable status is observed, decrease the value in 20-msec steps. When
0 msec is set, the same axis movement as that in full-closed mode is
performed. When 32767 msec is set, the same axis movement as that
in semi-closed mode is performed.
For a system that requires simultaneous control of two axes, use the
same value for both axes.
1974 (FS15i)
Dual position feedback zero-point amplitude
2081 (FS30i, 16i)
[Setting value] Zero width (µm)/minimum detection unit for full-closed mode
[Unit of data] Minimum detection unit (µm/p) for full-closed mode
Positioning is performed so that the difference in the position between
full-closed mode and semi-closed mode does not exceed the pulse
width that corresponds to the parameter-set value.
First set the parameter to 0. If still there is fluctuation, increase the
parameter value.
If this is applied to an axis with a large backlash, a large position error
may remain. For details, see Art. (5) in this section.
1729 (FS15i)
2118 (FS30i, 16i)
Dual position feedback: Level on which the difference in error between the
semi-closed and full-closed modes becomes too large
[Setting value] Level on which the difference in error is too large (µm)/minimum
detection unit for full-closed mode
[Unit of data] Minimum detection unit (µm/p) for full-closed mode
If the difference between the Pulsecoder and the separate detector is
greater than or equal to the number of pulses that corresponds to the
value specified by the parameter, an alarm is issued.
Set a value two to three times as large as the backlash.
When 0 is set, detection is disabled.
#7 #6 #5 #4 #3 #2 #1 #0
1954 (FS15i)
HBBL HBPE
2010 (FS30i, 16i)
HBBL (#5) The backlash compensation is added to the error count of:
1: The closed loop.
0: The semi-closed loop. (Standard setting)