Hema PClamp E, Operating Instructions Manual

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18. Causes of faults - solutions
PClamp
EN
16
Malfunction Possible cause Remedy
Retaining force
does not
correspond to
specifications
Air pressure at the pneumatic cylinders too
high (more than 4 or 6 bars) Call HEMA services
Rod and clamping sleeve soiled with lubricant
or fats Clean rod with suitable cleaner, remove any
soiling, check material pairing with HEMA
services
Round rod/shaft or round guide to small Select round rod/shaft with matching diameter,
contact HEMA services
Clamp and screw-on surfaces not sufficiently
parallel Ensure that they are parallel, take constructional
precautions, compensate differences with metal
foil
Tolerance dimensions between PClamp and
shaft deviate from specifications Adhere to tolerances as specified by HEMA,
check tolerance and roundness
Tightening torques and correct force transfer
through screwed connection not perfect Check tightening sequence of the connecting
screws and tightening torque
PClamp's life span exceeded Call HEMA services
Clamp does not
open properly
Diaphragm error Check the PClamp's functioning; check it for leaks,
contact HEMA services
Round rod/shaft or round guide to large Select round rod/shaft with matching diameter,
contact HEMA services
Clamp and screw-on surfaces not sufficiently
parallel Ensure that they are parallel, take constructional
precautions, compensate differences with metal
foil
Pressure insufficient Increase pressure up to max nominal pressure
Alignment not precisely executed during
installation Check for sufficient clearance, check installation
steps again
Storage and transport temperature outside of
specifications Temperatures under 10°C can affect the rubber
diaphragm. This then becomes hard and un-
susceptible, and may leak temporarily
Response times
too long
Air supply throttled too much Valve too small, maintenance unit too small,
supply line too long, too thin, not free or bent
Venting insufficient Check and ensure venting
Unfavourable compressed-air circuit Avoid long and thin hoses, tight radii, etc.; high
flow resistances produce long response times,
call HEMA services
Storage and transport temperature outside of
specifications Temperatures under 10°C can affect the rubber
diaphragm. This then becomes hard and unsus-
ceptible, and may leak temporarily
Loud air and
purging noise
Diaphragm error Check the PClamp's functioning; checkit for leaks,
contact HEMA services
Storage and transport temperature outside of
specifications Temperatures under 10°C can affect the rubber
diaphragm. This then becomes hard and unsus-
ceptible, and may leak temporarily
Screw connections on connecting parts leaking Tighten screw connection, change sea
PClamp's life span exceeded Call HEMA services
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