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45
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No. TQ1230001-OM104-C
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Piping
Caution
1) Flushing of the inside of the pipes
Before piping is connected, it should be thoroughly blown out with air (flushing) or washed to remove chips,
cutting oil, and other debris from inside the pipe.
2) Tube attachment
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Take a tube having no flaws on its periphery and cut it off at a right angle. When cutting the tube, use
tube cutters TK-1,2,3,5, or 6. Do not use pliers, nippers, scissors, etc. If cutting is done with tools other
than tube cutters, the tube may be cut diagonally or become flattened, etc., making a secure installation
impossible, and causing problems such as the tube pulling out after installation or air leakage. Allow
some extra length in the tube.
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Grasp the tube and push it in slowly, inserting it securely all the way into the fitting.
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After inserting the tube, pull on it lightly to confirm that it will not come out. If it is not installed securely
all the way into the fitting, this can cause problems such as air leakage or the tube pulling out.
3) Tube detachment
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Push in the release button sufficiently, pushing its collar equally around the circumference.
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Pull out the tube while holding down the release button so that it does not come out. If the release button
is not pressed down sufficiently, there will be increased bite on the tube and it will become more difficult
to pull it out.
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When the removed tube is to be used again, cut off the portion which has been chewed before reusing
it. If the chewed portion of the tube is used as is, this can cause trouble such as air leakage or difficulty
in removing the tube.
4)
Other Tube Brands
When using other than SMC brand tube, confirm that the following specifications are satisfied with
respect to the tube outside diameter tolerance.
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Nylon tube
Within ±0.1mm
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Soft nylon tube
Within ±0.1mm
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Polyurethane tube
0.15mm, Within -0.2mm
Do not use tube which do not meet these outside diameter tolerances. It may not be possible to connect
them, or they may cause other trouble, such as air leakage or the tube pulling out after connection.
5) Do not apply unnecessary forces, such as twisting, pulling moment loads, vibration, impact, etc., on
fittings or tubing.
6) Tubing, with the exception of coiled tubing, requires stationary installation. Do not use standard tubing
(non-coiled) din applications where tubing is required to travel inside the flexible protection tube.
Tubing that travels may sustain abrasion, extension, or severance due to tensile force. The removal of
tubing from the fitting may also occur. Use caution prior to use in an application.
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Do not lift the product by the piping after the tube is connected. Doing so may result in damage to the
One-touch tube fitting. For details, refer to the “Handling Precautions for SMC Products” on the SMC
website: https://www.smcworld.com
7) Adjust the length of air tube following by the movement of the robot arm to avoid adding tension the
tube.
When adding the tension of tube repeatedly, it may result in air leakage.
And the tube bending radius in the vicinity of the fitting should be at least the minimum bending radius of the
tubing.
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Exhaust from Ejector
If the operating environment contains a lot of particles or mist, the silencer may be clogged. If the silencer is
clogged, it will cause a reduction in the ejector performance. Replace the silencer in such case. (Refer to “7.1.
Maintenance for vacuum gripper”)
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Exhaust noise
When vacuum ejector generates vacuum, noise can be heard from the exhaust port when the standard supply
pressure is close to the pressure that generates peak vacuum pressure making vacuum pressure unstable. If the
vacuum pressure range is adequate for gripping, there should not be a problem. If the noise causes a problem or
affects the setting of the pressure switch, change the supply pressure slightly to avoid the pressure range of the
noise.