Futtura EconoGrade EG1, Инструкция по эксплуатации

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Test Next
Chg Dir Stop
Chg Dir Stop
Minimum DC 35%
Down PlsDC 20%
Up PulseDC 35%
CAUTION:
THE FOLLOWING ITEMS WILL OPERATE THE
VALVE DRIVE. BE CAREFUL WITH THEIR USE! MAKE
SURE YOUR AREA IS CLEAR.
Minimum DC - EG Series needs information about the hy-
draulic system on your machine, as all hydraulic systems
are not the same. Here we are telling the system the signal
needed to move the cylinder at its slowest speed. Pressing
the Power (Test) soft key will enter you in to this routine. Your
hydraulics will begin to move, use the Up/Dwn buttons to in-
crease or decrease the signal to the valve until you get a blade
movement of approximately 0.25 inches per second (1 inch
in 4 Seconds). Press the Power Chg Dir soft key to change
the direction, then adjust the cylinder speed for the opposite
direction. When the cylinder speed is OK then press the Menu
(Stop) soft key and these values will be stored. There may be
a need to enter different values for Up and Down to balance the
over all minimum speed. This is due to gravity helping in the
downward direction and the volume differences in the cylinder,
from the cap end to rod end.
Valve Gain - The span of error between the onset of valve
operation and the point at which the valve is fully open is deter-
mined by the valve gain setting. In this case, the units dis-
played (percentage) are arbitrary, but higher numbers suggest
more vigorous valve action. With the gain set to 100%, the
slightest error will fully open the appropriate valve. This setting
should be left at 50% until after the Minimum Pulse width has
been set and the hydraulics tested to see in which direction
you would like to adjust this setting. The higher the number the
more aggressive the hydraulic system. Conversely the lower
the number the less aggressive the hydraulic system will be.
Balancing Danfoss Ratio-Metric Servo - These three
settings are important in balancing the hydraulic servo. The
most important of the three is the valve dead-band, it must
be set to a realistic value that your machine’s geometry can
handle. The next in importance is the Minimum DC, this sets
the hydraulic system’s slowest speed, if too fast the servo will
never have the ability to balance and control grade. The last
setting, Valve Gain, sets the over all hydraulic aggressiveness.
If set too high the cylinder speed changes will be too large and
the servo will never be able to balance. Conversely set too low
the cylinder speed changes will be too small, a balance servo
will not be achieved. A balance in these three settings while
the machine is working under it’s normal load should give you
good hydraulic control.
Page 16
35% Next
Valve gain
Test Next
Minimum DC 35%
0.5” grade Next
Valve deadband
35% Next
Valve gain
Note: Pressing the “Stop” soft key will turn off the valve
drive, and return you to the Minimum PW window. Also,
the valve will shut off automatically after 20 seconds with-
out any buttons being pushed.