
1.AXIS CONTROL B-63323EN-1/03
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1.2.10 Vertical Axis Drop Prevention Function
Overview
If the machine is brought to an emergency stop and the power for a
servo motor is turned off, the machine applies a brake to the axis
corresponding to the stopped servo motor. If the power for the servo
motor of a vertical axis is turned off before a brake is applied to it
sufficiently, the vertical axis will drop. To solve this problem, it is
possible to defer turning off the power until a brake is applied
sufficiently.
Parameters are used to specify the axis for which turning off the power
is to be deferred and how much to defer. This function can be used
when the machine is brought to an emergency stop and when a servo
alarm occurs on a nonvertical axis. If a servo alarm occurs on a vertical
axis, turning off the power for its servo motor will not be deferred.
Parameters
#7 #6 #5 #4 #3 #2 #1 #0
1883 BCL
0: !"#$$%4$/!%/%"!%
"%%#'
0: Does not defer turning off the power (disable the function).
1: Defers turning off the power (enable the function).
1976 Power-off delay
@%" !
%)
!"$%#!$%"%""$%#&
Limitations
If a vertical axis and a nonvertical axis are connected to the same
multiaxis amplifier, the multiaxis amplifier turns off the power for the
vertical axis at the same time that the power for the nonvertical axis is
turned off. This prevents the vertical axis drop prevention function
from functioning normally.
A vertical axis should be connected to a single-axis amplifier as much
as possible.
If it is impossible to use a single-axis amplifier for a vertical axis,
connect vertical axes having the same delay time to a multiaxis