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5
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Caution
①
Do not wipe off the grease attached on the sliding face of the cylinder.
If the grease is removed from the sliding part of the cylinder forcibly, a malfunction could occur. When the
cylinder has been in operation for a long distance, the sliding parts become discolored black.. In such cases, to
prolong cylinder life, wipe off the grease from the sliding parts, and add new grease. (When the grease is wiped
off, use water. If it is wiped off with alcohol or special solvent, the seal could be damaged.)
②
Avoid giving external force over maximum output to the cylinder.
A pieces of cylinder broken by the force may damage the human and the device.
③
Don’t use plural cylinders synchronously without guide.
It is difficult to control speed of the cylinder using air, whitch is compressive fluid, because speed is given an
effect by change of supplied pressure, load, temperature, lubrication and each part, and difference of the
performance of each cylinder. For a short time, it is possible to adjust speed of plural cylinders by speed
controller, but for a long time, above mentioned factors may break synchronisum of those cylinders. If
synchronism is broken, lateral load caused by difference of position is given to piston rod and may wear seal
and bearing, and make galling to cylinder tube and piston. If it is necessary to use plural cylinders
synchronously, use the guide with hardness and high accuracy not to make difference to speed of each
cylinder which has individual output.
④
Prevent intrusion of obstruction such as cutting chip from supply port into inside of the
cylinder.
If the cylinder is put on the floor at field during positioning for installation, cutting chip made by the drill for
mounting hole may intrude from supply port of the cylinder and cause failure.
⑤
Cut the length of piping short.
Too long cylinder piping makes volume of mist in the cylinder (the mist is caused by adiabatic expansion) less
than one in the piping tube, and prevent the mist from being released to air. Residual mist in the tube becomes
pooled by repeating actuation, and may leads to occurrence of water which removes the grease of the
cylinder. As the result of it, the condition of lubrication becomes worse and air leakage caused by wear of seal
and malfunction by increase of friction resistance occure. In order to solve this issue, following
countermeasure is necessary.
(1) Cut piping tube from solenoid valve to cylinder short as much as possible and make mist release to
atmosphere properly. Following formula is eferred.
Converted value of content volume of cylinder to atmospheric pressure×0.7
≧
Content volume of piping tube
(2) Make exhaust pressure discharge directly to atmosphere by installing speed exhaust controller ASV or
quick exhaust valve.
(3) Direct piping port downwardly so that moisture occurring in piping wouldn’t return to cylinder.
