
D.PARAMETERS RELATED TO HIGH-SPEED AND HIGH-PRECISION OPERATIONS APPENDIX B-65270EN/05
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• Standard settings (precision priority)
When there is vibration or significant impact, or when machining
is to be performed more precisely, make settings based on the
standard settings.
• Cutting time-first setting
To reduce machining time, make settings for speed priority I then
for speed priority II in stages. The settings for speed priority II
can reduce much more machining time than the settings for speed
priority I.
(1) AI high precision contour control, AI nano high precision contour 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
1769 24 16 16 Time constant (ms) for acc./dec. after cutting feed interpolation
1660 700.0 2000.0 4000.0
Acceleration in acc./dec. before interpolation (for
constant-acceleration part)
(Acceleration is specified in mm/s
2
for individual axes.)
1772 64 48 32
Time constant of bell-shaped acc./dec. before interpolation (msec)
(for constant-acceleration part)
1783 400.0 500.0 1000.0
Allowable speed difference (mm/min) in acceleration-dependent on
speed difference at corners
1737 525.0 1500.0 3000.0
Permissible acceleration in deceleration by acceleration
(Acceleration is specified in mm/s
2
for individual axes.)
1735 525.0 1500.0 3000.0
Permissible acceleration in deceleration by acceleration in circular
interpolation
(Acceleration is specified in mm/s
2
for individual axes.)
• 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
1602#6,#3
1,1 Acc./dec. after interpolation is of a bell-shaped type
(Note 1)
7055#3 1/0
To be set to 1 if a function of changing the time constant for bell-shaped
acc./dec. before interpolation is to be used.
7066
mm / inch
10000.0/3937.0
Reference speed (mm/min / inch/min) for a function of changing the time
constant for bell-shaped acc./dec. before interpolation
19503#0 0/1
When using smooth velocity control as velocity control by acceleration, set 1.
(Note
2)
8451#4 0/1
Set this parameter to 1 if cutting load-dependent override is to be used.
(This parameter is used if the mechanical rigidity of the Z-axis is low.)
(Note 2)
19515#1 0/1 When using the slant type for override by cutting load, set 1.
(Note 2)