Speed Control; Allowable Kinetic Energy - SMC Networks C G1 N-Z Series Operation Manual

2-5. Speed control

When the piston speed is adjusted, install SMC AS series speed controller near the air supply
port to adjust to the specified speed. There are two methods of speed adjustment, one is to
restrict air supplied to the product (meter-in), and the other is to restrict air exhausted from the
product (meter-out). Normally, the meter-out type should be adopted.
！
C a u t i o n
Piston speed should be controlled gradually from low speed to the specified

speed with a speed controller fully closed.

2-6. Allowable kinetic energy

2-6-1. CG1*N Series / Rubber bumper
The product has a rubber bumper at both ends of the piston or the cover, which can soften
the shock at stroke end and reduce the noise created during operation and by the shock.
This feature enables the use of the product at a high frequency or high speed operation.
！
C a u t i o n
When the product is equipped with a rubber bumper, note that there may be

a slight bounce at the stroke end.
2-6-2. CG1*A Series / Air cushion
The kinetic energy generated by large loads and high speeds is absorbed at the stroke end
using the compressed air, so the parts around the actuator are not affected by vibration.
！
C a u t i o n
1) Cylinder cushions are adjusted properly before leaving the factory, but it is
still necessary to readjust the cushion valve on the cover according to the
working load and operating speed.
2) When the cushion valve is turned in a clockwise direction, the orifice
becomes smaller and the cushion effectiveness is increased. When the
cushion valve is turned in a counter-clockwise direction, the orifice
becomes larger and the cushion effectiveness is reduced.
3) The cushion seal is subject to wear. The cushion effectiveness therefore
changes in the product operation over an extended period of time.
Readjust the cushion as necessary.
4) If the cushion valve is fully closed, the piston may bounce at the end of
stroke and not move through the full stroke, or the cushion seal may
become damaged due to excessive pressure.
cushion valve.
5) If the cushion valve is opened too much, the cylinder will operate like
cylinders without an air cushion, and the impact force will be extremely
large.
6) Air cushion is not for reducing the piston speed around the stroke end.
－10－
Do not fully close the