SMC Networks HYRODLESS MONOSASHI-KUN, Operating Manual

Page: 13 / 42

13
3-3 Pneumatic Circuit
Sol.1 Sol.2 Sol.3
A ON OFF ON
B OFF ON ON
Stop OFF OFF OFF
Pneumatic Equipment
Bore
Size
Directional Valve
Brake Valve Regulator
Horizontal Mounting Vertical Mounting
25 VFS25
□
0 VFS24
□
0R VFS21
□
0 AR425
32 VFS25
□
0 VFS24
□
0R VFS21
□
0 AR425
40 VFS25
□
0 VFS24
□
0R VFS21
□
0 AR425
・
Air Balance
・
With the above circuit, maintaining the slider at center by balancing both sides (left & right) supply
pressure to achieve air balance state.
・
At the situation of vertical mounting, maintain the slider at the center and reduce the upper
portion
’s supply pressure accordingly to counter for the weight due to gravity. If air balance is not
achieved, motion after center positioning will be either accelerating abnormally or false movement.
Hence, the accuracy of positioning will be affected.
・
Tubing
・
Use larger diameter
’s tube and reduce the tubing length between solenoid valve and cylinder, so
as to increase position determination
’s precision.
・
Connect brake valve near to slider. If tubing between brake valve and slider is long, its motion
response time will be slower. Moreover, it may rush vigorously when brake is released.
・
During installation, connected tubing should be flushed thoroughly, and prevent dust and chips
from entering into cylinder.
・
Supply Pressure
・
Set brake release port
’s supply pressure as 0.3~0.5MPa. With supply pressure of below 0.3MPa,
brake
’s release will not be activated. While with pressure of above 0.5MPa, brake ’s life span will
be shortened.
・
Direct pressure supply from pressure line will cause pressure variation problem a nd thus, affect
cylinder performance. Hence, it is advisable to connect regulator before driving and brake
solenoid valve. Besides that, if there is a lot of cylinder activated and moving at the same time,
use regulator with larger flow characteristic and install air tank.
・
Connect head cover tubing wisely with consideration of surrounding conditions.
Horizontal Mounting
<Air Circuit Diagram>
Vertical Mounting