
7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL B-63783EN-1/01
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Acceleration/deceleration types
There are two types of acceleration/deceleration, the linear
acceleration/deceleration type and the bell-shaped acceleration/
deceleration type. By setting a non-zero value for parameter No. 1656,
bell-shaped acceleration/deceleration is assumed. Bell-shaped
acceleration/deceleration produces smoother acceleration/
deceleration.
Look-ahead linear acceleration/deceleration before interpolation
If 0 is set for parameter No. 1656, linear acceleration/deceleration is
applied as the acceleration/deceleration before interpolation.
- Example of deceleration
Deceleration starts in advance so that the feedrate specified for a block
can be attained when the block is executed.
To decrease the feedrate from F3 to F2, deceleration must be started
from P1.
To decrease the feedrate from F2 to F1, deceleration must be started
from P2.
Because multiple blocks are read in advance, deceleration can be
performed over all those blocks.
Pro
rammed speed
Feedrate obtained b
acceleration/deceleration
before interpolation
P1
P2
N2N1
F1
F2
F3
Feedrate
Time