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Slip Ring Specification Form
The following form is provided to assist in designing or specifying
a slip ring for your application. The form may be printed and faxed
to Fabricast or sent via Email directly from the website. If you would
prefer to talk to an engineer please call.
Download printable
PDF of this page
INTRODUCTION
It is very important for Fabricast’s engineers to understand a customer’s
application in order to specify the best slip ring assembly for their
application. Outlined below are the major considerations Fabricast’s
engineers will need to know about an application. Our Slip Ring Specification
Form is provided to assist in defining your application.
DEFINING SLIP RING APPLICATION
What is the application the slip ring will be used in? By defining the
basic type of application (automated medical equipment, semiconductor
robot, stabilized camera system, radar pedestal, centrifuge, etc.),
Fabricast will draw on prior experience and knowledge in specifying
and designing your slip ring.
DEFINING BASIC SLIP RING DESIGN
Fabricast manufactures both separate rotor & brush block and self-contained
slip ring assemblies. Self-contained slip rings consist of a rotor,
stator and integral ball bearings that maintain the alignment between
the two. The self-contained slip ring, although larger and generally
more expensive, offers the following benefits: 1) ease of integration
into the customer’s system, 2) the customer is not responsible
for the correct brush pressure and alignment at the brush/ring interface,
and 3) the brush/ring interface is not exposed. The separate rotor &
brush block assemblies consist of two components, the rotor and the
brush block. The separate rotor and brush block type slip ring is generally
smaller and less expensive than a self-contained unit, but the customer
is responsible for mounting the brush block and maintaining the correct
brush block/rotor relationship.
DEFINING ELECTRICAL REQUIREMENTS
The current carrying capacity and voltage of each ring should be specified.
Fabricast will determine the number of brushes per ring and the lead
wire size based on the current carrying capacity of each ring. Ring
to ring spacing is determined by the specified voltage of each ring
and the mechanical requirements of the assembly. To achieve the most
cost effective solution and the smallest mechanical envelope, do not
rate all rings at current and voltage of highest rated rings. The current
and voltage of each ring or set of rings should be specified individually.
DEFINING MECHANICAL REQUIREMENTS
- Mechanical Considerations
The specified RPM and duty cycle will be used to select appropriate
brush contact material, bearings, and other slip ring components.
Fabricast has extensive experience in high RPM slip ring assemblies.
- Mechanical Envelope
The bore diameter will define which of Fabricast’s standard
assemblies will be used. The length and outside
diameter of these assemblies are shown in the catalog. It is important
to determine the maximum mechani-
cal envelope so Fabricast can specify the most cost effective solution
with optimum mechanical and
electrical design characteristics if modifications or a custom assembly
is required.
- System Interface Requirements
How will the slip ring integrate into the system? Fabricast’s
standard slip rings are manufactured with
unobstructed thru bores for shaft mounting. Mounting methods for our
standard assemblies are shown in
the catalog. Electrical connections to Fabricast slip rings are via
unterminated flying leads on the rotor side
and solder terminals on the stator side. Non standard rotor lead lengths
and stator wiring are optional.
DEFINING OPERATING ENVIRONMENT
It is critical that Fabricast understand the environment the slip ring
will operate in. If the slip ring operates in ex-
tremely high temperatures, altitude, hard vacuum, dry nitrogen, oil,
or other special environments, Fabricast may
need to incorporate special materials of construction or other design
modifications.
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of this page
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