
B-65150E/04 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 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.
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 9060/C(03) and subsequent editions (Series 15-B, 16-A, 18-A,
20, 21, Power Mate)
Series 9066/A(01) and subsequent editions (Series 20, 21, Power Mate)
Series 9070/A(01) and subsequent editions (Series 15-B, 16-B, 18-B)
Series 9080/A(01) and subsequent editions (Series 15-B, 16-C, 18-C)
Series 9081/C(03) and subsequent editions (Series 15-B, 16-C, 18-C)
Series 9090/C(03) and subsequent editions (Series 16i, 18i, 21i, Power
Mate i)
Series 90A0/A(01) and subsequent editions (Series 15i, 16i, 18i, 21i,
Power Mate i)
NC command
Feed-forward data
NC command
Feed-forward data under
advanced preview feed-
forward control