
7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL B-63943EN-1/02
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7.2.4 Bell-Shaped Acceleration/Deceleration after Cutting Feed
Interpolation
Overview
The bell-shaped acceleration/deceleration after cutting feed
interpolation provides smooth acceleration and deceleration to reduce
stress and strain on the machine. If this function is enabled parameter
CTB (No. 1610#1), acceleration/deceleration is performed as follows:
Cutting feed:
Bell-shaped acceleration/deceleration (constant acceleration
time)
Specify the acceleration/deceleration time constant for each axis
in parameter No. 1622.
Jog feed:
Exponential or bell-shaped acceleration/deceleration (constant
acceleration time)
Specify the acceleration/deceleration time constant for each axis
in parameter No. 1624.
Speed
Speed
Time
Time
Bell-shaped acceleration/deceleration
T : Time constant
TT
Acceleration/
deceleration function
Bell-shaped acceleration/deceleration after cutting feed interpolation
is an optional function. This function is enabled when the CTB bit (bit
1 of parameter No. 1610) is specified. The time constants for cutting
feed and for jog feed for each axis are specified in parameter Nos.
1622 and 1624 respectively, in the same way as exponential
acceleration/deceleration. The values specified for the FL feedrate for
cutting feed (parameter No. 1623) and the FL feedrate for jog feed
(parameter No. 1625) are ignored (always assumed to be 0).