Ergonomics - Atlas Copco
Ergonomics - Atlas Copco
Ergonomics - Atlas Copco
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48<br />
depends on its inertia. The same impulse<br />
will have a greater turning effect on a<br />
straight tool than on a pistol grip tool.<br />
ViBration<br />
There are two types of screwdriver. The<br />
shut-off type and the slip clutch type.<br />
Shut-off tools have very short operating<br />
cycles. The pulse from tightening with a<br />
shut-off tool cannot be regarded as a vibra-<br />
tion. Slip clutch tools, on the other hand,<br />
continue to run until the operator releases<br />
the trigger. Operators tend to run the tools<br />
with the clutch slipping for a few seconds<br />
on each joint. This behavior will expose the<br />
operator to unnecessary vibration.<br />
noiSe<br />
These tools are often used in low noise<br />
assembly areas. Therefore, low machine<br />
noise is important to avoid disturbing<br />
workers’ conversation or enjoyment of radio<br />
broadcasts. Another reason for keeping<br />
noise levels to a minimum is the fact that<br />
an operator performing a precision task<br />
often works with his head close to the tool.<br />
A muffler is used for noise control on<br />
pneumatic tools and the exhaust air is often<br />
piped away from the machine in an exhaust<br />
hose. Electric screwdrivers normally have<br />
very low noise emissions.<br />
DUSt anD oil<br />
Dust is not created in the process and the<br />
tool is lubrication free.<br />
Electric screwdrivers can be programmed to<br />
tighten the joint to the correct torque with a minimum<br />
of reaction torque to the operator.