2. Functional Description; 2.1 Installation In A Machine Tool Spindle - SKF FS-1 Component Lifecycle Manual

2. Functional description

2. Functional description

2.1 Installation in a machine tool spindle

The FS-1 Humidity Sensor detects the
relative humidity (RH) inside a spindle and
transmits the reading to the customer's con-
trol unit as an electrical signal (4-20 mA).
Analyzing this information allows mainte-
nance and servicing to be planned promptly,
thereby increasing the process reliability and
the spindle's service life.
The sensor head is designed so that the
ambient atmosphere can easily reach the
measuring element. This is provided for
by side holes on the circumference of the
head or through its open front side. On de-
livery, a transport cap is affixed to the front
side. Remove this cap before installing the
humidity sensor.
The customer must determine the engage-
ment depth so that the sensor head cannot
come into contact with any moving parts.
The ambient air for measurement must
be able to reach the head unimpeded. The
holes must be freely accessible.
The sensor's housing can be screwed into
the spindle body using an M18x1 thread
and must be secured using the included
locknut.
The electrical connection is established via a
standardized M12x1 plug.
Electrical
Connection
M12x1
PLC
machine
Due to the measurement principle, the
measuring element in the housing of the
FS-1 must be mounted in an open state
and is therefore susceptible to electrostatic
charge. The FS-1 Humidity Sensor should
therefore not be operated in an environment
susceptible to ESD.
FS-1 Humidity Sensor
M18x1 thread with locknuts
Tool spindle
EN
System description, Fig. 1
Sensor head
with side holes
- see note,
page 6
9
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