
D.PARAMETERS RELATED TO HIGH-SPEED AND HIGH-PRECISION OPERATIONS APPENDIX B-65270EN/05
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(2) AI advanced preview control
• Parameters that need tuning based on the machine type
Standard setting value
Parameter
No.
Standard
setting
Speed
priority I
Speed
priority II
Description
1432 - - - Maximum cutting feedrate (mm/min) for individual axes
1620 - - -
Time constant (ms) for linear-shaped acc./dec. in rapid-traverse
for individual axes
1621 - - -
Time constant T2 (ms) for bell-shaped acc./dec. in rapid-traverse
for individual axes
1730 3060 5150 7275 Feedrate upper limit (mm/min) for arc radius R
1731 5000 5000 5000 Arc radius R (1 µm) for arc radius-based feedrate upper limit
1732 100 100 100 Arc radius-based feedrate clamp lower speed limit (mm/min)
1768 24 16 16 Time constant (ms) for acc./dec. after cutting feed interpolation
1770 10000 10000 10000
Maximum cutting feedrate (mm/min) during acc./dec. before
interpolation
1771 240 80 40
Time (ms) allowed before a maximum cutting feedrate during
acc./dec. before interpolation is reached
1772 64 48 32
Time constant of bell-shaped acc./dec. before interpolation (for
constant-time part) (msec)
1783 400 500 1000
Allowable speed difference (mm/min) in acceleration-dependent
on speed difference at corners
1784 - - -
Speed (mm/min) at occurrence of overtravel alarm
To be specified according to the overrun distance at overtravel
1785 320 112 56
Parameter (ms) for determining an allowable acceleration in
determining acceleration-dependent speed. The parameter is to
be set with the time allowed before a maximum cutting feedrate
(1432) is reached.
A maximum cutting feedrate of 10000 mm/min is used as the
standard setting value.
• Parameters that do not usually need tuning so often and can be left at fixed
values
Parameter
No.
Standard setting
value
Description
#6,#3
1,0 Acc./dec. after interpolation is of a linear type (to be specified when FAD is used)
1602#6,#3
1,1
Acc./dec. after interpolation is of a bell-shaped type (to be specified when FAD is
not used)
1603#7 1
Acc./dec. before interpolation is of bell-shaped type. (0: Linear-shaped acc./dec.
before interpolation)
1802#7 0/1
To be set to 1 if the CMR setting is 2 or greater (parameter No. 1820 setting is 4
or greater).