PRODUCT DESCRIPTION
66 | EN
www.schmalz.com
30.30.01.00559/05
The vacuum switch, item [11], monitors the operating vacuum and releases the machining operation
when the pressure difference equals or exceeds -600 mbar. If the level falls below this limit, the machine
receives and electronic signal from the vacuum switch: "Machine STOP".
The entire system is ventilated (=> pressure equalisation) as soon as the vacuum pump is switched off
and the valves responsible for the feedback process are fully opened. This accelerates the complete
discharge and the liquid is conveyed directly out of the storage tank.
WARNING
Loss of clamping force due to a loss of vacuum
Personal injury and property damage due to workpieces accelerated by
machining forces
►
This must be taken into account when designing the overall machine.
►
Individuals are not permitted to stay in the hazard area during the
machining process.
2.2.1 Standard machining
During the standard machining process, the VOC is evacuated before the workpiece on the machine
table or the clamping device can be clamped by the vacuum. This requires the vacuum generator to be
operated. The workpiece is then clamped.
The release for machining the workpiece is provided once the required vacuum value of -600mbar is
reached and displayed and signalled by vacuum switch [1Z2], item [11] (The vacuum switch does not
send a current signal (0) more.).
The precise process is displayed in the flow diagram.
Electronic signals emitted by the VOC described in the flow diagram:
Swich Vacuum generator on (step 1)
Clamp / release workpiece (step 2 u. 4: set up)
1:
Release for machining from -600mbar (see "Vacuum OK" designation)
2:
Minimum vacuum level not reached (-600mbar); machining/coolant supply STOP (see "Vacuum
OK" designation)
3:
A signal, vacuum < -600mbar, is sent to the machine (see "Vacuum OK" designation)
4: Maximum permitted liquid level reached; machining/coolant supply STOP (see "Tank full"
designation)
