OnRobot HANWHA 3FG15 User Manual page 117

Hardware Specification
• Extra attention must be paid to leakages, e.g. vacuum cup shape and surface roughness
The air flow capability of a VG grippers is shown in the graph below:
VG pump, air flow performance
Vacuum percentage
NOTE:
The easiest way to check if a cardboard box is sufficiently tight
is simply to test it using the VG grippers.
A high vacuum percentage setting does not give a higher lifting
capacity on corrugated cardboard. In fact, a lower setting is
recommended, e.g. 20%.
A low vacuum setting results in less air flow and less friction
below the vacuum cups. This means VG gripper filters and
vacuum cups will last longer.
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