Koso REXA Electraulic Xpac, Installation And Operation Manual

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REXA
Electraulic Actuators & Drives
Xpac
Installation Manual -- Version 5.1 (4/09)
H-9
Low Acceleration and Accelera-
tion Breakpoint provide different
features for the B and C size power
modules. See section 6.3.2.
The speed of the unit is equal to the Gain times the difference be-
tween the current and target positions. Upper limits on the speed
remains the value set for High Speed and the lower limit is the value
set for Minimum Speed (Figure H.1).
Integral action utilizes the values of Acceleration Breakpoint and
Low Acceleration in the ACC Branch. The speed will increase at
the value for Low Acceleration, but will not start this increase until
it reaches the Acceleration Breakpoint.
PROPORTIONAL
Gain (dG) controls the point at which the actuator will begin to decel-
erate. Values from 5 to 50 may be selected. The higher the value,
the closer the unit will be to the target position before the calculated
motor speed begins to drop below High Speed. Recommended
initial settings are shown in Figure H.2. The effect of this parameter
on performance is indicated in Figure H.3.
Minimum Speed (dL) specifies the lowest speed in percent of maxi-
mum that the motor will reach under proportional control. Values
from 5 to 20 may be selected. Recommended initial setting are
shown in Figure H.2. The effect of this parameter on performance
is indicated in Figure H.3.
Figure H.1 Speed Profile
INTEGRAL
Low Acceleration (LA) is the rate at which the speed increases from
the minimum (dL) until either High Speed or the target position is
reached. Values from 1 to 99 may be selected. Recommended
initial settings are shown in Figure H.2. The effect of this parameter
on performance is indicated in Figure H.3.
Gain and minimum speed will ap-
pear in the CAL Branch only if a
D size Power Module is selected
[(CtL:dt)=d1, d2 or d3].