B--63003EN--1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
646
If linear acceleration/deceleration after interpolation for cutting feed is
enabled (bit 0 of parameter No. 1610, CTL), acceleration/deceleration is
performed as follows:
Cutting feed: Linear acceleration/deceleration (constant acceleration
time)
Specify the acceleration/deceleration time constant for
each axis in parameter No. 1622.
Jog feed: Exponential or linear acceleration/deceleration (constant
acceleration time)
Specify the acceleration/deceleration time constant for
each axis in parameter No. 1624.
If an identical time constant is specified, linear acceleration/deceleration
can halve the delay relative to the programmed time, in comparison with
exponential acceleration/deceleration, thus reducing the time needed for
acceleration and deceleration. If circular interpolation is performed,
especially when high--speed cutting is being performed, the actual tool
path created after acceleration/deceleration will deviate from the
programmed arc in the radial direction. This deviation can also be
reduced, in comparison with exponential acceleration/deceleration, by
applying linear acceleration/deceleration.
Feedrate
Acceleration/
deceleration
circuit
Time
t: Time
constant
Feedrate
Time
Feedrate
Time
Feedrate
Time
t
t
tt
Acceleration/
deceleration
circuit
7.2.3
Linear Acceleration/
Deceleration after
Cutting Feed
Interpolation
General