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5. TROUBLESHOOTING
5.1 Problems, Causes and Solutions
Cylinder
5.1.1
If the cylinder does not operate properly, check the table below for a possible solution.
Problem
Cause
Solution
Cylinder does not
Work.
Insufficient pressure.
Confirm supply pressure to cylinder.
No signal in the directional control valve.
Check the control circuit.
Insufficient flow rate.
Check piping status.
Check the opening of the speed control valve.
Piston rod does not
operate smoothly.
Lubrication of sliding parts is insufficient.
Supply grease.
Seal is bad.
Check packing installation condition.
Change packing.
The fixed orifice is blocked.
Clean the fixed orifice of the port bottom hole.
Deformation of the guide pin, broken.
Replace guide pin.
Insufficient flow rate.
Check piping status.
Check the opening of the speed control valve.
Clamping force is
insufficient.
Insufficient pressure.
Secure pressure source.
Confirm supply pressure to cylinder.
Clamp position setting is wrong.
(The cylinder piston position at clamping is the
head side stroke end)
Adjust the installation so that the cylinder piston
position at clamping is 3 mm or more from the
head side stroke end.
Clamping force
reduce.
Seal is bad.
Check packing installation condition.
Change packing.
Insufficient flow rate.
Check piping status.
Check the opening of the speed control valve.
Cylinder installation is bad.
Confirm that the cylinder is firmly installed.
The mounting of the clamp lever is bad.
Check if the clamp lever mounting screw is
loose.
Speed increases.
The opening level of the speed control valve
has changed.
Opening level of the speed control valve and
checking the fixed state of the variable opening
needle.
Speed is reduced.
The opening level of the speed control valve
has changed.
Opening level of the speed control valve and
checking the fixed state of the variable opening
needle.
The fixed orifice is blocked.
Clean the fixed orifice of the port bottom hole.
Clamp lever angle at
clamping changes for
each tact.
Guide pin and piston rod lead groove are worn
out.
Change cylinder.
Replace guide pin.
Replace piston rod assembly.
Damage, Deform.
Impact force due to high speed operation is
large.
Change cylinder.
When resuming operation check the piston
speed to be used.
The moment of inertia of the clamp lever is
higher than the allowable value.
Change cylinder.
Check if the moment of inertia of clamp lever is
within allowable value.
Use it at a pressure exceeding the maximum
working pressure.
Change cylinder.
Check the supply pressure to the cylinder when
restarting operation.
For other unclear points, please consult your nearest sales office or distributor.
