
B-65270EN/05 4.SERVO FUNCTION DETAILS
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4.6.2 Advanced Preview Feed-forward Function
(1) Overview
The advanced preview feed-forward function is part of the advanced
preview control function. It enables high-speed and high precision
machining. The function creates feed-forward data according to a
command which is one distribution cycle ahead, and reduces the delay
caused by smoothing. This new function can upgrade the high-speed,
high precision machining implemented under conventional
feed-forward control. The conventional feed-forward control function
executes smoothing in order to eliminate the velocity error of each
distribution cycle (see Fig. 4.6.2 (a)). This smoothing, however,
causes a delay in the feed-forward data.
The new advanced preview feed-forward control function uses the
distribution data which is one distribution cycle ahead and generates
delay-free feed-forward data (Fig. 4.6.2 (b)). The function can provide
higher controllability than the conventional feed-forward control
function.
NC command
Feed-forward data
NC command
Feed-forward data under
advanced preview feed-
forward control
Fig. 4.6.2 (a) Conventional feed-forward control Fig. 4.6.2 (b) Advanced preview feed-forward control
(2) Series and editions of applicable servo software
(Series 30i,31i,32i)
Series 90D0/A(01) and subsequent editions
Series 90E0/A(01) and subsequent editions
(Series 15i-B,16i-B,18i-B,21i-B,0i-B,0i Mate-B,Power Mate i)
Series 9096/A(01) and subsequent editions
Series 90B0/A(01) and subsequent editions
Series 90B1/A(01) and subsequent editions
Series 90B6/A(01) and subsequent editions
(Series 0i-C,0i Mate-C,20i-B)
Series 90B5/A(01) and subsequent editions
(3) Setting parameters
<1> Set the following parameters in the same way as for conventional
feed-forward control.
#7 #6 #5 #4 #3 #2 #1 #0
1808 (FS15i)
PIEN
2003 (FS30i, 16i)
PIEN (#3) 1: PI control is selected.