Vermes MDS 358X user Manual.pdf - 第67页
Initial Operation 56 VTK - TR -BA- 072e - 1 - User Manua l MDS 358X S eries 6.4 Va lve s with Air co oling If you wa nt t o air cool your va lve wit h compressed ai r, you h ave to c onnect the ai r hoses af ter finis hi…
Initial Operation
VTK-TR-BA-072e-1 - User Manual MDS 358X Series
55
Fig. 32: Connection Cable for FCV-AC/HF M12 to MDC
With the connection cable, you can connect the cooler connector of the FCV-AC 6.0 M12 to the
rear side of the control unit. Connect the air outlet of the flow control valve to the inlet of the
microdispensing valve (marked with “IN”). Use a suitable hose. Connect the air inlet of the flow
control valve to the compressed air supply.
6.3.3.6 Connection Diagram
The picture below offers an overview of how to connection all parts with cables and hoses (using
one flow control valve and one heater as example).
Fig. 33: Connection diagram of MDS 358X
Initial Operation
56
VTK-TR-BA-072e-1 - User Manual MDS 358X Series
6.4 Valves with Air cooling
If you want to air cool your valve with compressed air, you have to connect the air hoses after
finishing the cable connections of the valve. Use 4 mm hoses.
Fig. 34: Valve with air cooling connected
One end of the hose has to be pushed onto the air inlet of the valve (in); the other one is
connected to the air supply.
The second connector (out) represents the outlet, evacuating the heated compressed air from
the valve. You can extend this connection with an air hose. Push one end of the air hose onto the
adapter. When running the hose to the air supply, take care not to impair functions of the system,
or to disturb operators during their work.
For air cooling you should use a compressed-air pressure of about 2 bar. For a hot melt
application or other high temperature applications, you should set the pressure higher, at up to
4 bar.
IMPORTANT NOTE
Quality of compressed air
Quality of compressed air should comply with DIN ISO 8573-1.
The pneumatic supply used for cooling of the valve should be free of fine dust and condensate,
and correspond to classes 1, 4, 2 according to DIN/ISO 8573-1.
• Solid particles: Quality class 1
max. number of particles/m³: 0.1 – 0.5 µm: < 20000, 0.5 – 1 µm: < 400, 1 – 5 µm: < 10
• Water content: Quality class 4
max. pressure dew point +3 °C
• Residual oil: Quality class 2
0.1 mg/m³ max.
Initial Operation
VTK-TR-BA-072e-1 - User Manual MDS 358X Series
57
6.5 The Adjust Process
This chapter explains the adjust process, which is performed as a top adjust when using a valve
of the MDV 358X Series, thanks to the adjust screw. A thoroughly performed adjust is the basis
for clear and reproducible dispensing results.
The microdispensing system is unable to perform a regular repeatable process, if the nozzle
insert is not properly positioned relatively to the tappet prior to dispensing. Therefore, you have
to perform the adjust during initial operation and after each exchange of the nozzle fixation nut.
This is especially important to avoid any leakage during dispensing.
Here, the adjust via keypad is described. You can also control the adjust via the serial interface as
remote adjust (see paragraph 8.2.3 "Remote Adjust", page 117). For special applications you can
set an adjust offset with service code 33 (see paragraph 7.12 "Adjust Offset", page 75).
IMPORTANT NOTE
Cleaning before adjust
The system has to be cleaned thoroughly before the adjust. The presence of dirt particles
jammed between the tappet surface and the nozzle insert would compromise the results. For
information how to remove the dirt read the cleaning chapter (see chapter 9, page 120).
INFORMATION
Adjust deactivates heater and cooling
In case heater or cooling are still ON, they will be automatically deactivated by an adjust. After
you have performed the adjust, the cooling will be automatically switched back to the ON/OFF
status before the adjust. But the heater needs to be turned ON again manually, if you need it for
your application.
INFORMATION
Time limit for the adjust
If you do not reach step 3 of the adjust after approx. two minutes, the adjust is cancelled. You
have to start the adjust from the beginning.
Preparation for the adjust:
– Screw the nozzle fixation nut absolutely tight (see Fig. 35; torque for screwing it tight at least
150 cN.m).
Fig. 35: Screwing tight the nozzle fixation nut
Adjust, step 1 (Starting the adjust):
– Press the [ADJ]-key on the keypad of the control unit.