Datasheet

352
SAFETY, GRIPPERS
Construction
• CAutIoN!
1. To minimize the risk of injury, SMC recom-
mends bellows over the gripper moving parts.
2. There should also be some form of protection
that ensure that the object handled by the
gripper does not cause injury if it drops due to
pressure drop in the system.
3. It is of utmost importance that the choice crite-
rias given for the different models is used and
no parameter is forseen.
4. Also read the general guidelines for pneumatic
components that are at the beginning of this
catalog.
Handling grippers
• WARNING!
1. Ensure that the gripper isn’t dropped on the
oor or is subject to shocks during mounting.
A small deformation can cause reduced accu-
raccy or function.
2. Make sure the screws are tightened with the re-
quired torque, and that these values are neither
under- or overrun. Too little torque may cause
the gripper to move in the application, an ex-
cessive torque may cause the gripper to fail or
malfunction. Appropriate torque is specied for
each gripper.
3. If some kind of gripping tool is applied to the
gripper ngers, it is important that the intended
holes are used and the permitted torque is not
exceeded.
4. Depending on the design of grippers, they can
be mounted In different ways. Examples can
be axially mounted or mounted in the side.
Each model has the relevant tightening torque
stated.
Selecting grippers
• DANGeR!
1. The current object’s center of gravity must lie
within the current gripper workspace. If the
holding point’s position is offset (eccentric
gripping) in relation to the nger center line (x
and y direction), the force cause a backlash in
the mechanism of the gripper, thereby causing
shortened life time. See the appropriate meas-
ure In the charts for each gripper.
The attachment of the object in the gripper
must be designed so that the attachment is as
short and light as possible. Too long a distance
can cause force caused by the object’s kinetic
energy to open or close the gripper ngers. If
so, choose a larger size of the gripper or more
grippers of the same size.
2. Choose a gripper that is adapted to the ob-
ject’s shape and size so that the force is trans-
mitted to the object optimally. This is especially
important When the object is small in size, very
light and requires clearance of space. A grip-
per that doesn’t t with the object may cause
the center of gravity to shift to a less favorable
position.
L and H are
suitable
L is too long
H is too long
Hold point
Hold point
Hold point
✘
✘
✔
L
H
L
H