6. Improper use / warning
Braking from already developed movements, of rotationally moved machine elements
is not permitted.
The retaining forces specified by HEMA can only be achieved under optimum conditions.
Fats, wear, corrosion, soiling, defects, etc. may result in changing braking/retaining forces
and moments.
The optional rod scrapers must be used to prevent fats or accumulations of greasy dirt
from negatively affecting performances.
The optional inductive limit switches have been designed solely for the purposes of
recognising the switching status and not for the purposes of carrying out function checks.
The PClamp N, ISO, E clamping and braking systems are not designed to secure suspended
loads when machines or machine parts are being manufactured, transported, assembled,
installed, commissioned, used, cleaned, subjected to troubleshooting, shut down,
disassembled or disposed of in personal danger areas without redundant safety systems.
PClamp N, ISO, E cannot be used as guides or as bearings for moving machine elements.
Shearing forces may result in reduced braking/retaining forces and torques, limit-switch
malfunctions and/or defects.
Deviations from the specified operating pressure may result in damage and/or cause the
system to fail. Higher pressures don't equate with greater retaining forces.
The braking effect or build-up of force may be delayed if the system has not been in use
or has not been activated for a long time.
The screwed connections must be able to absorb the maximum retaining forces during
the application
The limit switches' signals may cause the control to malfunction.
7. Residual risks
The PClamp N, ISO, E clamping and braking systems are not fitted with a second safety
circuit. When the system is actuated intentionally or by accident, the clamp opens and there-
fore the retaining force is no longer transferred to the round rod so that the force or mass to
be secured will no longer be held. As a consequence, during all operating modes and life-
cycle phases without a redundant system there are mechanical dangers. Additional residual
risks of crushing, cutting, shearing, abrasion, puncturing, accelerated components exist as a
result of:
unsecured connected structures, disruptions in the pneumatic air supply (e.g. pressure
fluctuations)
human error (e. g. stress, fatigue, »convenient shortcuts«)
failure to observe the information and warning signs
wrong use of the PClamp (see Section 6.)
impacts, abrasion, cutting as a consequence of inadequate compressed air connections
or loose compressed air lines or fastening screws
wrong switching procedures as a result of wrong signals from the limit switches
unintentionally fast-moving round or piston rods
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Operating instructions
EN
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