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of individual cylinders, and the change of components over time. Therefore, it is possible to
synchronize multiple cylinders for a short period of time by adjusting them with a speed controller.
However, the synchronization could fail easily due to changes in various conditions. When the
synchronization fails, the difference in position will apply an excessive force to the piston rod. The
force will be a lateral load, which can cause uneven wear of the seals, abrasion of the bushing,
and galling between the cylinder tube and piston. For this reason, avoid designing the system in
such a way that the movement is synchronized by the cylinders. If the synchronized use is
unavoidable, provide a guide with high rigidity and high precision to prevent the failure of
synchronization against the difference in force of the cylinders.
12) Intermediate stop
It is difficult for this product to make a piston stop at the required intermediate position accurately
and precisely by a 3 position closed center type directional control valve, due to the compressibility
of air. Furthermore, since valves and cylinders are not guaranteed for zero air leakage, it may not
be possible to hold a stopped position for extended periods of time. Contact SMC if it is necessary
to hold the stopped position for extended periods of time.
Caution
13) Operate the product within a range such that the piston will not collide and be
damaged at the stroke end.
If the piston with inertia force is expected to stop by colliding with the cover at the stroke end, use it
within a range that will not cause damage. Refer to the cylinder model selection table for the range
that will not cause damage.
3-6. Mounting, Installation and Others
Caution
1) Make sure to connect the piston rod and the load so that their axial centers and
movement directions match.
If they do not match, stress could be applied to the rod and the cylinder body, causing the inner
surface of the cylinder body, the bushing, the rod surface, and the seals to wear and become
damaged.
2) When an external guide is used, connect the piston rod end and the load in such
a way that there is no interference at any point within the stroke.
3) Do not scratch or dent the sliding parts of the cylinder body or guide rod or
piston rod, by striking or gripping them with other objects.
Cylinder body bores are manufactured to precise tolerances, so that even a slight deformation
may cause faulty operation.
Scratches or dents, etc. in the piston rod may lead to damaged seals and cause air leakage.
Moreover, scratches or dents may lead to damaged bearing and cause deterioration of
non-rotating accuracy and operation failure.
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2021-06-28 11:26
DC006789
