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Version 06
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3. Overview, functional description
below a certain factory-set value because,
for example, a tool with a very small cooling
duct cross-section is used. Aerosol which
has already been produced flows off to the
lubrication point.
Aerosol generation continues when the
pressure difference rises again. This process
is referred to as “intermittent operation” and
is clearly detectable by operating noises.
The minimal quantity lubrication system of
series UFD DigitalSuper is available in vari-
ous configurations.
The designs differ in terms of number of
aerosol generators, the communication in-
terface to the machine tool, the presence of
a bypass control and/or an automatic filling
pump (see Chapter 3.6).
The DigitalSuper minimal quantity lubrica-
tion system is controlled via a communica-
tion interface to the machine tool. The inter-
face is implemented as a fieldbus connection
designed for either PROFIBUS or PROFINET
(further fieldbus interfaces available on re-
quest).
The minimal quantity lubrication systems
operate as a slave on the fieldbus.
Minimal quantity lubrication systems with
a PROFINET communication interface are
equipped with a gateway enabling integra-
tion into a PROFINET network.
MQL systems with bypass control (BPC)
are equipped with active bypass control spe-
cially designed for demanding drilling tasks
such as deep-hole drilling with small tool
diameters (<5 mm).
Further, the MQL systems can be equipped
with self-priming filling pumps.
This pump allows for refilling of the lubricant
supply inside the aerosol generator from a
refilling reservoir supplied by the customer
(SKF reservoir according to customer re-
quirements). The pump is switched on and
off by the control unit of the MQL system.
There are two ways to activate the pump:
Either through a command from the ma-
chine tool via PROFIBUS or PROFINET, or
through the control unit’s automatic mode.
The option to be used is set manually by
means of DIP switches in the MQL control
unit.
