
3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT B-65270EN/05
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When the in-position width is 20 pulses, a time of about 180 ms is
required from distribution completion to positioning. Reducing this
time can speed up positioning.
Positional
deviation
Command from
the CNC
Servo delay time of
about 180 ms
In-position width
Fig. 3.3.3 (e) Measurement of time before adjustment
<1> Default parameter setting for fine acc./dec. and feed-forward
Set the parameters according to Table 3.3.3. By setting the
default parameters, the time required for positioning can be much
reduced.
Table 3.3.3 Default parameters for rapid traverse positioning adjustment
Default parameter
Item
Series 15i
Series 30i, 16i,
and so on
Setting
Rapid traverse feed-forward enable No. 1800 #3 No. 1800 #3 1
Fine acc./dec. function enable No. 1951 #6 No. 2007 #6 1
Linear-type fine acc./dec.
No. 1749, #2 No. 2009 #2 1
Fine acc./dec. time constant No. 1702 No. 2109
(*1)
40
Feed-forward enable No. 1883 #1 No. 2005 #1 1
Feed-forward coefficient No. 1985 No. 2092
(*1)
9700
Velocity feed-forward coefficient No. 1962 No. 2069
(*1)
100
*1 When using different values for cutting and rapid traverse,
use the cutting feed/rapid traverse switchable fine acc./dec.
function according to Section 4.3, "CUTTING
FEED/RAPID TRAVERSE SWITCHABLE FUNCTION."