
B-63943EN-1/02 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
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7.1.10 Feed Stop Function
Overview
During axis motion, the feed stop function checks a position deviation
amount at all times. When the amount exceeds the "feed stop position
deviation amount" set by the parameter (No. 1832), the function
suspends pulse distribution and acceleration/deceleration control
during such a period of time, and terminates the move command for
the positioning control circuit. Thus the function can minimize an
overshoot that may occur with a large servo motor in rapid traverse
acceleration operation.
Speed
Time
Feed stop
Specified speed
ctual speed
Parameter
1832 Feed stop positioning deviation for each axis
[Input type] Parameter input
[Data type] 2-word axis
[Unit of data] Detection unit
[Valid data range] 0 to 99999999
Set the feed stop positioning deviation for each axis.
If the positioning deviation exceeds the feed stop positioning
deviation during movement, pulse distribution and acceleration/
deceleration control are stopped temporarily. When the positioning
deviation drops to the feed stop positioning deviation or below, pulse
distribution and acceleration/deceleration control are resumed.
The feed stop function is used to reduce overshoot in acceleration/
deceleration mainly by large servo motors.
Generally, set the middle value between the positioning deviation
limit during movement and the positioning deviation at rapid traverse
as the feed stop positioning deviation.