Design - SMC Networks C96N C Series Operation Manual

2-2. Design

The compatibility of the product is the responsibility of the person who designs the equipment or decides its
specifications.
W a r n i n g
・There is a possibility of dangerous sudden action by cylinders if force is changed due to twisting
of sliding parts of machinery.
In such cases, human injury may occur; e.g., by catching hands or feet in the machinery, or damage to the
machinery itself may occur. Therefore, the machine should be designed to operate smoothly and avoid such
dangers.
・A protective cover is recommended to minimize the risk of personal injury.
If the driven object or moving parts of the product will pose a hazard to humans, a construction that prevents
direct contact with the exposed area must be provided.
・Securely tighten all stationary parts and connected parts, so that they will not become loose.
Be certain to adopt a reliable connecting method if the cylinder is used frequently, or if it is used in a location
that is exposed to a large amount of vibration.
・A deceleration circuit or shock absorber etc., may be required.
When a driven object is operated at high speed or the load is heavy, the cylinder's cushion will not be
sufficient to absorb the shock. Install a circuit to reduce the speed before cushion or install an external shock
absorber to relieve the shock. Confirm the rigidity of the equipment after the measure shown above is taken.
・Design the system so that an external force exceeding the maximum output does not apply to
the product.
The product can break, causing a risk of personal injury or damage to equipment.
・The product generates a large force. Install on a sufficiently rigid mounting base, taking this
force into consideration.
There is a risk of personal injury or damage to equipment.
・Power failure may cause the circuit pressure to decrease.
・Consider a possible loss of power source.
Measures should be taken to prevent personal injury and damage to equipment in the event that there is a
power malfunction to equipment controlled by air pressure, electricity or hydraulics, etc.
・Consider the behavior of an emergency stop.
Devise a safety system so that if a person engages the emergency stop, or if a safety device is tripped
during a system malfunction such as a power outage, the movement of the cylinder will not cause a hazard
to humans or damage the equipment.
・Avoid using cylinders for synchronized operations.
Even if multiple pneumatic cylinders are initially set to the same speed, their speeds may vary due to
changes in operating conditions. Therefore, do not design a circuit which is to transfer one load by
simultaneous operation of more than one cylinder.
・Consider the action when operation is restarted after an emergency stop or abnormal stop.
Design the machinery so that personal injury or damage to equipment will not occur upon restart of
operation. When the cylinder has to be reset at the starting position, install safety manual control equipment.
C a u t i o n
・Avoid having a large gap between the clevis and mating bushing, as this exposes the pin to a
bending load.
・Do not touch the cylinder during high speed and high frequency operation.
When the cylinder is operating at high speed and high frequency, the surface temperature of the cylinder
tube increases, and may cause injury to personnel.
・Do not use the air cylinder as an air-hydro cylinder.
If the working fluid of the air cylinder is turbine oil, oil leakage can result.
・The oil adhered to the cylinder is grease oil.
・The base oil of grease may seep out.
The base oil of grease in the cylinder may seep out from the tube, cover, or rod sliding part depending on the
operating conditions (ambient temperature of 40
etc.). Contact SMC especially if a clean environment is required.
o
C or more, pressurized condition, low frequency operation,
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