Schmalz FMHD, Инструкция по эксплуатации

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38 | EN www.schmalz.com 30.30.01.01648/06
6.2.5 Functional Diagram of FMHD with Impulse Valve
Using:

Separating cylinder

“Blow off” function

Impulse valve for controlling the separating cylinder

NC control valve for the “Blow off” function
At the start of the lifting process, which begins with the preloading from the vacuum reservoir, a brief
impulse must be applied to the “Blow off” control valve. This ensures that both valves are in the correct
position. An impulse length of 25 ms is sufficient. The impulse length for depositing the workpiece de-
pends on the vacuum level in the gripper and the type of products being handled. The best way to de-
termine it is through tests during the start of operations.
For the impulse valve, an impulse length of 25 ms is sufficient.
Duration of the “blow off” compressed air pulse
Depending on the workpiece, the blow off process should last for roughly three to
five seconds.
24 V
“Separating cylinder” EMC
Vo
lta
g
e
0 V Pretensioning Applying suction Depositing Idle state
Time
24 V
“Blow off” EMC
Vo
lta
g
e
0 V Pretensioning Applying suction Depositing Idle state
Time
(brief blow off pulse)