
4.SERVO FUNCTION DETAILS B-65270EN/05
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#7 #6 #5 #4 #3 #2 #1 #0
1883 (FS15i)
FEED
2005 (FS30i, 16i)
FEED (#1) 1: The feed-forward function is enabled.
1962 (FS15i)
Velocity feed-forward coefficient (VFFLT)
2069 (FS30i, 16i)
[Recommended value] 50 (50 to 200)
<2> Set the coefficient for advanced preview feed-forward control.
1985 (FS15i)
Advanced preview feed-forward coefficient (ADFF1)
2092 (FS30i, 16i)
[Recommended value] 9800 to 10000
Advanced preview feed-forward coefficient (0.01% unit)
=
α × 10000 (0 ≤ α ≤ 1)
(Example)
When α equals 98.5%, ADFF1 is 9850.
Advanced preview control is configured as shown below:
Deceleration algorithm and function of
acc./dec. before interpolation of CNC
• Acc./dec. method causing no figure
errors
• Deceleration at a point where a large
impact would be expected
Advanced preview feed-forward function of
digital servo
• Improving the tracking ability of the
servo system
Because of this configuration, the function can improve the
feed-forward coefficient up to about 1 without impact and also
reduce figure error.
<3> By specifying the G codes listed below, the modes related to
high-speed and high precision machining such as advanced
preview control can be turned on/off. In each mode, advanced
preview feed-forward is enabled.
NOTE
While the fine acc./dec. (FAD) function is being
used, the advanced preview feed-forward function is
always used, and the advanced preview
feed-forward function cannot be turned on and off
by G codes.
Advanced
review
control