Datasheet

353
3. Choose a gripper that has a sufciently high
holding force to offset the object’s own weight.
Too low holding force can cause the gripper to
drop the object and cause injury. See the re-
spective gripper holding force values. Grippers
should be designed so that its clamping force
equivalent to 10–20 times the object’s weight.
4. Do not use the grippers in applications where
external forces or other inuences can effect
the gripper function. Examples of such cases
can be at other machine components’ move-
ments, starting and stopping position for the
movement of the gripper.
Contact SMC if there is any doubt.
5. Choose a gripper with the required stroke
length. Too short stroke can cause false sig-
nals from a position sensor when the sensor
switching differential (hysteresis) falls outside
the gripper workspace.
6. If a gripper is to pick up an item from some-
thing internal, ensure that there is enough
space for the gripper to use its’ full stroke.
7. Ensure that the various parts t together cor-
rectly if used for assembly work.
8. Check carefully that the ngers movement
speed is adjusted. At delivery, the metering is
set and locked. By changing the metering level,
the opening and closening speeds can be ad-
justed. Warning: If the metering is fully opened,
the nger speed becomes too high and the
mechanism will suffer excessive force, which
will shorten the life time of the gripper. Each
model have stated recommendations.
SAFETY, GRIPPERS
Clearance
Clearance
Gripped object
Gripped object
With clearance
With clearance
Clearance
Clearance
Clearance
Clearance
Clearance
Without clearance
Without clearance
Power inuence
Power inuence
Power inuence
Power inuence
End position at movement of gripper
End position at opening of gripper
Torsion (rotation) of work piece (gripper)
✔
✘
✔
✘
✔
✘