36 | EN
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The cylinder is retracted when no voltage is applied. In this way, the reservoir and
suction chamber are connected.
6.2.2 Sequential Diagram for the FMHD with Separating and Ventilation Cylinders
Simplified diagram of a gripper cross-section
Vacuum reservoir
Compact cylinder (extended)
1
– Separating cylinder
2
– Ventilation cylinder
Valve chamber
Sealing foam
Workpiece
Pretensioning
Before the suction process starts, the vacuum reservoir integrated
into the suction bar must be evacuated.
The amount of time this process takes varies based on the suction
bar type, vacuum generator capacity and the length. Generally, this
process is started approximately 0.5 to 5 seconds before picking up
the load.
Both control valves are activated (both LEDs light up). The cylinder
extends. The separating cylinder separates the vacuum reservoir
from the valve chamber. The ventilation cylinder separates the vac-
uum reservoir from the atmosphere. Vacuum is generated in the res-
ervoir chamber when the vacuum generator is switched on.
Applying suction
Once the sealing mat has been placed on the workpiece and is com-
pressed, the system can start picking it up.
To do so, the separating cylinder control valve is reset. The cylinder
piston rod retracts, the load is picked up, and it can be transported
once the necessary vacuum level is reached.
Depositing
Once the workpiece has been transported and set down, it must be
deposited.
The ventilation cylinder control valve is also now reset. As a result,
the ventilation cylinder retracts and opens the vacuum reservoir to
the environment. The vacuum breaks down. The workpiece is re-
leased from the sealing mat.
Both cylinders are retracted when no voltage is applied. See the “Depositing”
state.
2
1
1
2
2
1
2
1
