Chapter 3
18
AutoBoom® Calibration & Operation Manual
completely independent of each other. When above the target height, control of each boom is
accelerated. A stability factor of zero may be desirable for implements with a very rigid center rack.
XT Gain.
(UltraGlide XT Systems Only) The XT gain value allows fine tuning of the allowable rotation of the
center rack suspension.
The default gain value is 15. Higher XT gain values cause the XT control to react more aggressively when
chassis roll is sensed by the node. Setting the XT gain too high may cause the center rack to be excessively
rigid and possibly cause damage to the center rack. Lower XT gain values cause the XT control to be less
aggressive when chassis roll is sensed. Setting the XT gain too low may cause the system to be
unresponsive to chassis roll.
To adjust the XT gain:
1.
Enable the left, right, and slant control in the field.
2.
While driving over varying terrain, observe the rotation of the center section compared to chassis roll.
3.
Raise or lower the XT gain value as necessary to cause the XT control to be more or less reactive.
Valve Settings
Minimum Pressure Percent (UltraGlide Systems).
The minimum pressure percent sets the lowest pressure
limit and will prevent the boom hydraulic pressure from falling below a percentage of static pressure, overriding
AutoBoom control when necessary to maintain the lowest pressure limit for each boom. The minimum
pressure percent setting also prevents travel-limited booms from resting on the boom stops during operation.
The default value for the minimum pressure percent is 65. The minimum pressure percent mode is intended for
emergency boom protection only. The AutoBoom system should not be run with booms at this pressure during
routine operation. On machines with travel-limited booms, operate the AutoBoom system with center rack
control enabled, or with the center sensor at or slightly below the target height to prevent the booms from
continuously entering the minimum pressure percent mode.
To adjust the minimum pressure percent:
1.
Raise the center rack section to the target height so that both booms and center rack are level and
horizontal to the ground.
2.
Set the minimum pressure percent value to 80.
3.
Place an obstacle (hand, note pad, etc.) at ground level below one boom sensor.
4.
Raise the obstacle steadily toward the sensor body (approximately 1 foot per second [30 cm/s]) to within 12
inches [30 cm] of the sensor surface, or until the boom raises approximately 3 feet [0.9 m] above the
original height.
5.
Remove obstacle from the sensor path and verify that the boom lowers slowly after a slight delay.
If the boom does not lower, decrease the minimum pressure percent value by one and repeat the
procedure. Repeat the procedure until the boom begins to lower.
PWM Frequency.
The PWM frequency sets the frequency of the pulse width modulated signal to the
proportional control valve. The following PWM Frequencies are automatically detected during the AutoBoom
calibration process and should not be adjusted:
•
60 Hz with square coils installed on the hydraulic valve,
•
250 Hz with round coils installed on the hydraulic valve.
XT PWM Frequency.
(UltraGlide XT Systems Only) The PWM frequency sets the frequency of the pulse width
modulated signal to the proportional control valve for extreme terrain control. The default frequency for the XT
system is 250 Hz. This value is automatically detected during the AutoBoom calibration process and should not
be adjusted.
