Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR) Mini-Crawler Crane M A E D A
4-76 1/2019 MC285C-3
Setting or Cancelling the Upper Limit
Value of the Working Radius
When the boom is in the prediction zone or upper
limit stop position in a condition in which the
working radius upper limit is set, the monitor
display illuminates in orange.
Fig. 4-206
Setup
Set the boom to the desired working radius in a
condition in which no upper limit value is set, and
press and hold the switch.
The upper limit value on the monitor display
changes to the orange colour and the working
radius is set as the upper limit value.
NOTICE:
• Be sure to check, before actual work, that the
boom automatically stops at the set working
radius. If the boom does not automatically stop,
reset the working radius in the above steps.
• When the boom is in the prediction alarm zone
or upper limit stop position, an alarm sounds
intermittently only if lowering operation or
extension operation is performed.
• The set value is memorised when the starter
switch is turned to the “OFF” position.
Cancel
Press and hold the switch in a condition in which
the upper limit value is set. The monitor display
changes to the blue colour and the upper limit
value or lower limit value setting is cancelled.
Setting/Resetting Slewing Angle Limits
When the slewing angle is in the advance warning
area or at the stop position in a condition in which
the slewing angle limit is set, the monitor display
illuminates in orange.
Fig. 4-207
Setup
Slew the boom to the desired angle in a condition
in which no slewing angle limit is set, and press
the switch. Once the switch is pressed, the yellow
display appears and clockwise (right) or
counterclockwise (left) slewing can be selected.
Each time the switch is pressed, the slewing
direction changes. Select the yellow indicator for
the direction to be set, and hold the switch.
The angle limit value on the monitor display
changes to the orange colour and the slewing
angle is set as the limit value.
NOTICE:
• Be sure to check, before actual work, that the
boom automatically stops at the set working
radius. If the boom does not automatically stop,
reset the working radius in the above steps.
• If the clockwise (right) slewing angle limit has
been set, the alarm sounds intermittently only if
the boom slews clockwise (right) or stopped in
the advance warning area, and if the
counterclockwise (left) slewing angle limit has
been set, the alarm sounds intermittently only if
the boom slews counterclockwise (left) or
stopped in the advance warning area.
• The set value is memorised when the starter
switch is turned to the “OFF” position.
Cancel
Press the switch in a condition in which the
slewing angle is set. The orange display section
can be selected in yellow. Each time the switch is
pressed, the selection changes. Select the yellow
indicator for the direction to be cleared, and hold
down the switch. The monitor display changes to
blue, indicating that the slewing angle limit setting
has been cleared.
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