571 Operation/Maintenance Instructions Page 16 of 19
The list below outlines some of the variables that directly affect the noise level of the machine:
VARIABLE RELEVANT FACTOR EFFECT
Timber Species Hard stiff timber can mean more noise
(approx. 2dB(A) difference when cutting
oak and pine) & more transmitted noise.
Width Wide work pieces radiate noise over a
greater area increasing the noise level.
Thickness Thin workpieces generally vibrate more
increasing the noise level.
Length Long workpieces transmit noise away from
the cutting area towards the operator.
Tooling Width of Chisel Noise increases roughly in proportion to
the width of cut.
Tool Sharpness Dull ands worn cutters tend to chatter.
The following noise levels were recorded at a distance of one metre from the machine (operator
side) with a combination block fitted, using varying feed rates and depths of cut.
The figures quoted for noise are emission levels and not necessarily safe working levels. Whilst
there is a correlation between emission levels and exposure levels, this cannot be used reliably
to determine whether or not further precautions are required. Factors that influence the actual
level of exposure to the work force include the duration of exposure, the characteristics of the
workroom, the other sources of dust and noise, etc., i.e. the number of machines and other
adjacent processes. Also the permissible exposure levels can vary from country to country. This
information, however, will enable the user of the machine to make a better evaluation of the
hazard and risk.
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