
3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT B-65270EN/05
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[Time Constant]
Set the initial value of the time constant of acc./dec. according to the
high-speed and high-precision function of the CNC used. Adjust the
time constant of acc./dec. to an optimum value while checking the
rapid traverse and cutting feed operations.
• AI nano contour control, AI contour control, AI advanced
preview control, and advanced preview control
Parameter No.
FS16i and so on
Standard
setting value
Description
1620 200 Time constant of acc./dec. in rapid traverse - linear part (ms)
1621 200 Time constant of acc./dec. in rapid traverse - bell-shaped part (ms)
1770 10000 Acc./dec. before interpolation: Maximum cutting feedrate
1771 240 Acc./dec. before interpolation: Time (ms) Æ 0.07G
1772 64
Acc./dec. before interpolation: Bell-shaped time constant (ms) (for other than
advanced preview control)
1768 24 Time constant for acc./dec. after interpolation (ms)
• AI nano high-precision contour control, AI high-precision
contour control, and high-precision contour control
Parameter No.
FS16i and so on
Standard
setting value
Description
1620 200 Time constant of acc./dec. in rapid traverse - linear part (ms)
1621 200 Time constant of acc./dec. in rapid traverse - bell-shaped part (ms)
8400 10000 Acc./dec. before interpolation: Maximum cutting feedrate
19510 240
Acc./dec. before interpolation: Time (ms) Æ 0.07G (No. 8401 for high precision
contour control)
8416 64 Acc./dec. before interpolation: Bell-shaped time constant (ms)
1768 24 Time constant for acc./dec. after interpolation (ms)
• AI contour control I and AI contour control II (Series 30i, Series
31i, and Series 32i)
Parameter No.
FS30i
Standard
setting value
Description
1620 200 Time constant of acc./dec. in rapid traverse - linear part (ms)
1621 200 Time constant of acc./dec. in rapid traverse - bell-shaped part (ms)
1660 700 Acc./dec. before interpolation: Acceleration(mm/s
2
) Æ 0.07G
1772 64 Acc./dec. before interpolation: Bell-shaped time constant (ms)
1769 24 Time constant for Acc./dec. after interpolation (ms)
• Series 15i
Parameter No.
FS15i
Standard
setting value
Description
1620 200 Time constant of Acc./dec. in rapid traverse - linear part (ms)
1636 200 Time constant of Acc./dec. in rapid traverse - bell-shaped part (ms)
1660 700 Acc./dec. before interpolation: Acceleration(mm/s
2
) Æ 0.07G
1663 700 Acc./dec. before interpolation: Acceleration(mm/s
2
) Æ 0.07G
1656 64 Acc./dec. before interpolation: Bell-shaped time constant (ms)
1635 24 Time constant for acc./dec. after interpolation (ms)