
B-65270EN/05 APPENDIX D.PARAMETERS RELATED TO HIGH-SPEED AND HIGH-PRECISION OPERATIONS
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(1) 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
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
• Parameters that do not usually need tuning so often and can be left at fixed
values
Parameter
No.
Standard setting
value
Description
1602#0 1 The type of linear-shaped acc./dec. before interpolation is B.
1602#4 1 Automatic deceleration at corners is under speed difference-dependent control
#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)
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).
3403#0 1 To be set to the standard setting value.