
VTK-VS-BA-015e-A | User Manual MDS 3200+ Series
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Initial Operation
37
5.4
The Adjust Process
The following segments explain the adjust, which is necessary for all valves, and the MNL
calibration and MNL adjust, which are only needed for F-valves. It is very important for you
to distinguish the two kinds of adjust. The normal adjust you need for every application. A
thoroughly performed adjust is the basis for clear and reproducible dispensing results. The
MNL adjust is only needed if you want to dispense very small drops. Therefore it is only im-
plemented for F-valves, which are specially suited for those kind of applications. The MNL
adjust has to be preceded by an MNL calibration.
The description assumes you are controlling the adjust directly via MDC. It is also possible to
do it remotely via the RS-232C interface. The relevant information for this method can be
found in chapter 7.1.2.
5.4.1
The Adjust
The 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 per-
form a general adjustment procedure during initial operation and after each exchange of the
nozzle unit. This is especially important to avoid any leakage during dispensing. An adjust
with nozzle heater is described in chapter 6.10.3.
CAUTION! (Cleaning before adjust)
The system has to be cleaned thoroughly before the adjust. The presence of dirt par-
ticles jammed between the tappet surface and the nozzle insert would compromise
the results.
You start the adjust by pressing
[adj]
on the keypad of the control unit.
Step 1:
Open the MNL screw completely. Turn the screw counter-clockwise. Use either the tool
MDT 302 or MDT 301.
IMPORTANT NOTE! (Open and closed marked)
The completely open and closed positions of the MNL screw are marked by a slightly higher
resistance. This step is only necessary for F-valves, since other valves do not have an MNL
screw. Never perform the adjust with a closed MNL screw.
Содержание MDS 3200+ Series
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Страница 119: ...VTK VS BA 015e A User Manual MDS 3200 Series Attachments 119 13 3 Dimensional Drawing MDV 3200A...
Страница 120: ...120 VTK VS BA 015e A User Manual MDS 3200 Series Attachments 13 4 F Dimensional Drawings MDV 3200F...
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Страница 122: ...122 VTK VS BA 015e A User Manual MDS 3200 Series Attachments 13 5 Connection Diagram PLC Interface...