OnRobot HEX-E QC User Manual page 224

HARDWARE SPECIFICATION
Amount * Area
Cups
It is often a good idea to use more vacuum cups than needed, to accommodate for vibrations,
leaks and other unexpected conditions. However, the more vacuum cups, the more air
leakage (air flow) is expected and the more air is moved in a grip resulting in longer gripping
times.
When using porous materials, the vacuum that can be achieve by using the OnRobot suction
cups will depend on the material itself and will be between the range stated in the
specifications. Some of the most common non-porous materials are listed below:
Fabrics
•
Foam
•
Foam with open cells
•
Low density cardboard
•
Low density paper
•
Perforated materials
•
Untreated wood
•
See the table below with general recommendations, in case other suction cups are needed
for specific materials.
Workpiece surface
Hard and flat
Soft plastic or plastic bag
Hard but curved or uneven
To be painted afterwards
Varying heights
NOTE:
It is recommended to consult a vacuum cup specialist to find the optimal
vacuum cup where the standard types are insufficient.
Suction Cups for Foil and Bags Ø25
This suction cup improves the vacuum gripper's ability to pick and place workpieces with
surface of foil, thin paper, and plastic bags during irregular and angular arm movement.
224
Payload [kg]
[mm] = 14700
Cup
Vacuum [kPa]
Vacuum cup shape
Normal or dual lip
Special plastic bag type
Thin dual lip
Any type
1.5 or more bevels
Vacuum cup material
Silicone or NBR
Special plastic bag type
Silicone or soft NBR
NBR only
Any type