
7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL B-63323EN-1/03
- 680 -
T:
:Time constant
Feedrate
Bell-shaped
acceleration/deceleration
TT
Feedrate
Bell-shaped acceleration/deceleration
(constant acceleration)
T
2
T
T
Set time constants T1 and T2 for parameters.
(The acceleration in the straight-line portion 1 is made
constant from the rapid traverse feedrate (parameter
No. 1420) and the setting of T1).
?
- Exponential acceleration/deceleration
With exponential acceleration/deceleration, the acceleration/
deceleration delay is large. On large machines, however, the overshoot
can be reduced.
The time constant and FL feedrate for each feed is set for the following
parameters.
Feed Time constant FL feedrate
Rapid traverse Parameter(No.1628) Parameter(No.1629)
Cutting feed Parameter(No.1622) Parameter(No.1623)
Jog feed Parameter(No.1624) Parameter(No.1625)
<Exponential function acceleration/deceleration>
Feedrate
Specified feedrate
Time
T:
@Time constant
T
T