28
28
6.7
Adjusting the Vacuum
Via the negative pressure the label is fixed to the applicator. This vacuum needs to be strong enough to hold the
label and cover all suction apertures. It may not be strong enough to hinder the transport of the from the printer to the
applicator. This is dependent on the label material used.
The default value of the vacuum is -0.6 bar.
i
Note!
By adjusting the vacuum it is possible to prevent the label from being applied to the product. If the vacuum
is too strong the label will not be released by the pad.
If the vacuum is set too high the advancement of the label can be stopped before it reached the pad
propperly.
support air
vacuum
1
Fig. 25
Vacuum throttle valve
Use the throttle valve (1) to ensure that the label is sucked up correctly over its entire surface.
To strengthen the vacuum turn the throttle valve setting screw counter-clockwise.
Measuring point (MP V) of the vacuum
MP V
1
2
3
With a Manometer that is capable of measuring pressures
ranging from -7 to 7 bar the effective pressures can be
measured.
MP V: Vacuum target value -0,6 bar
1. Demount cover.
2. Cover both suction pads hermetically.
3. Place the manometer at the MP V.
- Remove tube (1) from the chain.
- Y-connector (2) pressure supply to the pad
4. Press the micro-switch (3) to manually lift the magnetic
vent with an active air flow to measure the pressure.
5. If required adjust the pressure with the throttle valve.
6. Remount cover.
Fig. 26
Measuring point of the vacuum
!
Attention!
After measuring the pressure ensure that the connections to and from the air pressure are securely fastened
back in place.