DRILL & BLAST
Fletcher has engineered a range of advanced scalers
SAFERSCALING SOLUTIONS
personnel by decreasing the chance of rock and roof falls. With a continuing vision on safety,
S
JH Fletcher has engineered an entire fl eet of scalers, available for a wide range of applications. T e company’s scaling line ranges from vehicles built for limited spaces, operating in a working height of 2.1m, up to a high reach scaling vehicle, working in heights of up to 15.2m. With a Fletcher Scaler, scaling can be
performed from a stabilisJH ed carrier designed to aid in eliminating bounce and vibration of the operator’s cab or from a radio receiver outside of the vehicle. T e Fletchbus system is a recent addition
to the product portfolio. T is system works as a port of communication between the operator and machine, by interpreting to the operator what the machine is doing, and to the machine what the operator wants it to do. With the system, customers will receive
more interlock features, safety features, diagnostics, fl exibility, and an increase in performance.
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caling vehicles (scalers) are used to remove loose material from the mine roof and ribs. T e removal of loose rock increases mine safety for
Kayla Yeager introduces a range of scalers that off er a proximity detection system for greater operator safety
T e system is equipped with a home
screen display specifi c to the machine. T rough this screen, the operator can perform machine functions and view an active dashboard for machine statistics. T e operator also has the ability to review schematics, circuits, and feedback information through the home screen display. T e Fletchbus system works to increase
safety, with the ability to incorporate a variety of interlocks into the system. T is feature makes the state of functions mutually dependent. Interlocks aid in preventing the machine from harming its operator or damaging itself by preventing one element from changing state due to the state of another element. Within the system, Fletcher off ers the
Scalerometer feature. T e Scalerometer is designed to show various sensor readings that are monitored during scaling, providing operators pressure feedback via bar graphs. Included are sensors for boom lift pressure, boom extend pressure, and pick pressure. Each sensor has a warning and trip setting that are monitored to prompt the operator with a red bar graph and warning icon when over exerted. T e
pressure value and time is logged into the display’s memory whenever the trip pressure level is exceeded. T ese sensors are passive and are not required for the machine to continue function.
PROXIMITY DETECTION SYSTEM T rough the FletchBus system, Fletcher scalers can switch from in-cab operating to the radio receiver method. T e receiver has an infrared system that allows the machine’s control system to activate interlocks if the remote is detected in a particular location relative to the machine. T ese zones are determined by infrared (IR) emitters that radiate a “line of sight” beam at a pre- determined angle. Each beam has a unique address that is detected by the transmitter when its IR sensors intercept the IR beams from a particular zone. T e transmitter sends the zone to the control system which will determine what functions can be controlled from the transmitter. T e zones have an indicator lights on each side of the machine to guarantee that the remote and zone are linked and communicating. T e operator can observe the colour and fl ashing intensity of this light to determine communication issues or active interlocks depending on the location of the remote.
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