2 PRODUCT OVERVIEW
GENERAL DESCRIPTION OF FUNCTIONS
VACUUM GENERATION (PICKING UP THE WORKPIECE)
The ejector is designed for vacuum handling of parts in combination with suction systems.
The Venturi nozzle is activated and deactivated via the suction signal input. In the NO ver-
sion, the Venturi nozzle is deactivated when the suction input signal is present. In the NC
version, the Venturi nozzle is activated when the suction input signal is present.
An integrated sensor records the vacuum generated by the Venturi nozzle. This is evaluated
by an electronics system and serves as the basis for displaying the system states and
switching the output.
The ejector has an integrated air-saving function. The ejector automatically regulates the
vacuum while in suction mode. The electronics system switches the Venturi nozzle off when
the switching point H1 set by the user is reached.
If small volumes are to be evacuated, the set switching point H1 might be ex-
ceeded considerably before the vacuum is switched off. This system behavior
does not constitute an error.
When objects with dense surfaces are picked up, the integrated non-return valve prevents
the vacuum from dropping. If leakage causes the system vacuum to drop below the switch-
ing point H1-h1, the Venturi nozzle is switched on again.
BLOW-OFF (DEPOSITING THE WORKPIECE)
In blow-off mode, the vacuum circuit of the ejector is supplied with compressed air. This en-
sures that the vacuum drops quickly, depositing the workpiece quickly as well. Blow-off
mode can be controlled externally or internally.
When controlled externally, blow-off mode is activated by the “blow-off” signal input.
When controlled internally (automatic blow-off), the blow-off valve is actuated for a defined
period after suction mode is exited.
The ejector also has a manual mode. In this mode, the ejector can be controlled
using the buttons on the ejector’s foil keypad. See the “Manual mode” section for
more details.
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