SMC Networks CY3R Series Operation Manual page 10

The misalignment can be checked
by the following procedure.
1) After installation of cylinder to application,
increase pressure of regulator gradually
before checking operation of cylinder at
operating pressure, and then calculate
min. pressure which enables smooth
operation of cylinder over full stroke.
2) The min. operating pressure obtained
after mounting of load (actual min.
operating pressure) is different from
one of independent cylinder, but the
difference should be focused.
3) The actual min. operating pressure is
sum of "sliding resistance of cylinder",
"force to operate load" and "sliding
resistance of guide". (Fig. 5)
This means when misalignment is not
compensated enough, sliding resistance
of guide increases excessively.
Additionally, sliding resistance of external
slider increases and causes wearing to
wear so much as to induce operating failure.
（Ⅱ）Without other axes combined (Switch rail is used as non-rotation device.)
If the load is mounted directly on the cylinder without other axes, ensure that weight of the load,
stroke and moment are within allowable value with reference to Table 1 and 2.
If any of them exceeds corresponding allowable value, add the axis (LM guide etc.) to the cylinder.
(Fig. 4-1 to 4-4)
Table 1 Max. load weight
Cylinder tube
I.D. (mm)
φ6
φ10
φ15
φ20
φ25
φ32
φ40
φ50
φ63
Max. load
weight (kg)
0.2
0.4
1.0
1.1
1.2
1.5
2.0
2.5
3.0
Adjust to minimize this increase.
0 0.1 0.2 0.3
Fig. 5 (Reference)
Fig. 6-1 Load mounting direction
8
"Sliding resistance of cylinder(P1)"
Sum of "(P1)" and "force to operate load"
Actual min. operating pressure
Operating pressure
(MPa)
A