FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
5. FEED FUNCTIONS
B–62764EN/01
96
When the corner angle is smaller than the angle specified in the
parameter, the relationship between the feedrate and time is as shown
below. Although accumulated pulses equivalent to the hatched area
remain at time t, the next block is executed because the feedrate of the
automatic acceleration/deceleration circuit is smaller than the
parameter–set value. This function is effective only for movement on
the selected plane.
Feedrate V
Block A
Block B
Parameter–set feedrate
Time t
When acceleration/deceleration before interpolation is effective, the
relationship between the feedrate and time is as shown below. When the
angle between blocks A and B on the selected plane is smaller than the
angle specified in parameter (No. 1740), and the feedrates specified in
blocks A and B are larger than that specified in parameter (No. 1777), the
feedrate is decelerated to the parameter–set value in block A, and
accelerated to the feedrate specified in block B. The acceleration depends
on the parameter for acceleration/deceleration before interpolation.
Feedrate
Block A
Block B
Parameter–set feedrate
(parameter No. 1777)
Time
The angle between two blocks (blocks A and B) is assumed to be angle
θ, as shown below.
D Feedrate and time
D Acceleration/
deceleration before
interpolation
D Angle between two
blocks

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