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NM F loading monitor takes safety to a higher standard
Page 20
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• by Bryan Jarvis Crane manufacturer HMF has designed an electronically controlled vehicle stability (EVS) system that takes truck loading and loader safety a stage further.
EVS monitors and maintains the lorry loader's stability throughout its entire slewing areas, enabling the operative to work to the loader's optimum safe capacity all the time, even in the most hazardous conditions.
In particular, crane operatives working some distance away can continue unloading bricks when they cannot sense the truck's movement.
It is also effective when working ahead of the cab—traditionally an unstable area— and will prevent unsafe operational tendencies before they become critical.
As soon as loader operation begins, the system calibrates automatically, taking into account the vehicle's stance and any slope.
Micro-operation on the remote control permits the speed of some or all of the functions to be slowed down in one-tenths for applications where lowering or raising is a particularly delicate matter.
The EVS system is integrated with HMF's latest RCL (Rated Capacity Limitation) con
troller and links with a new AIC (Advanced Inebriation Control) unit via spool sensors on the valve block.
Any angular changes along the horizontal X and Y axis are thus monitored at an accuracy of one-thousandth of a degree at more than 30 times a second.
During loader operations, the AIC constantly checks the 'heel', or balance of the vehicle, communicating, at high speed with the RCL system via CAN-bus technology.
Assessing the information, the RCL, using its visual performance indicator, senses when the safe heel limit is reached and reduces all further movements that could increase the load moment or reduce stability.
EVS also allows the loader to operate safely even if an Obstruction, such as a wall or a busy road, prevents the stabiliser beam being fully extended. Should a leg suddenly sink into the ground, the system senses that the vehicle is 'heeling' and any instability is immediately countered. The fully patented system, which adds 15% to the cost of a crane, can be specified with all new HMF units equipped with the RCL 5200 or 5100 with HMF radio remote controls.
Since its UK introduction in November, orders for more than 10 systems have been received.