M A E D A Mini-Crawler Crane Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR)
1/2019 MC285C-3 4-75
Setting or Cancelling the Upper Limit
Value of Lifting Height
While the lifting height limit is imposed by
detecting the boom tip height, the monitor displays
the maximum height when the hook is hoisted up
to the over winding detected position.
When the boom is in the prediction zone or upper
limit stop position in a condition in which the hook
height is set, the monitor display illuminates in
orange.
Fig. 4-204
Setup
Set the boom to the desired maximum height in a
condition in which no upper limit value is set, and
press and hold the switch.
The monitor display changes to the orange colour
and the maximum height is set as the upper limit
value.
NOTICE:
• Be sure to check, before actual work, that the
boom automatically stops at the set hook height.
If the boom does not automatically stop, reset
the hook height in the above steps.
• When the boom is in the prediction alarm zone
or upper limit stop position, an alarm sounds
intermittently only if raising 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 setting is cancelled.
Setting or Cancelling the Boom Angle
Upper Limit Value/Lower Limit Value
When the boom is in the prediction zone or upper
limit stop position in a condition in which the boom
angle upper limit or lower limit is set, the monitor
display illuminates in orange.
Fig. 4-205
Setup
Set the boom to the desired angle in a condition in
which no upper limit value and lower limit value
are set, and press the switch. The yellow display
appears and the upper limit and lower limit can be
selected. Each time the switch is pressed, the
upper limit and lower limit change. Select the
yellow indicator for the direction to be cleared and
hold the switch.
The upper limit value on the monitor display
changes to the orange colour and the boom angle
is set as the upper limit value or lower limit value.
NOTICE:
• Be sure to check, before actual work, that the
boom automatically stops at the set angle. If the
boom does not automatically stop, reset the
boom angle in the above steps.
• An alarm sounds intermittently when the boom,
which is in the upper limit, is in the prediction
zone or upper limit stop position and only if the
raising operation is performed, and when the
boom, which is in the lower limit, is in the
prediction zone or lower limit stop position and
only if the lowering operation is performed.
• 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 upper
limit value or lower limit value 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 the switch. The monitor display
changes to the blue colour and the upper limit
value or lower limit value setting is cancelled.
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