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DC Motors & Optional Gearboxes
The widest range is key to infinite flexibility
Flexibility is the key characteristic of this section of the catalogue. The
permanent magnet brushed and brushless dc motors offered here have been
designed and wound to satisfy applications calling for a power range of
1-150 watts. 1.5v-30v voltage range is available where appropriate.
Windings have been chosen to offer speed variations where noise, life or
current may be critical. If you can’t find your exact requirement here,
motors can be wound to your precise specification.
Our innovative gearbox design expertise together with today’s materials have
been combined to maximise the full output power generated by this widest
range of motors in the most price sensitive way. Each gearbox type is
offered with many ratios, torque of 10 Nm to 20 Nm is achievable through the
range with speeds peaking at 500 rpm.
Low noise and extended life are characteristics that are high on our agenda.
Motors, gearboxes and encoders can be combined in a manner that is
infinitely variable, providing our customer with a precise and complete
solution for each and every application.
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DC Motor Schedule - Permanent Magnet Brushed
No Load Speed: 1390 to 15837 RPM
Max Eff. Torque: 0.9 to 101 mNm The simple permanent magnet brushed dc
motor is an impressive component. Continuous improvement has delivered
powerful and flexible performance at the very lowest cost.
Advantages of a brushed DC motor include low initial cost, high reliability,
and simple control of motor speed. |
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DC Motor Schedule - Rare Earth
No Load Speed: 3210 to 8403 RPM
Max Eff. Torque: 2.0 to 49.0 mNm Rare earth magnet motors can be a cost
effective option when high speed, high efficiency, long life or small size
are important. This low cogging motor range offers greater power compared
with other brushed motors of the same volume. This is achieved using very
thin Neodymium magnets, high density windings and a 6 slot core. |
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DC Motor Schedule - Heavy Case
No Load Speed: 4169 to 6803 RPM
Max Eff. Torque: 32.7 to 132.7 mNm The Heavy Case series motors provide
the ideal solution for use in applications which require output power
ratings up to 150 watts. The robust low inertia construction which utilizes
a skewed rotor for smooth running ensures reliable operation in industrial
environments combined with fast response and accurate control. |
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DC Motor Schedule - Brushless
No Load Speed: 6545 to 7672 RPM
Max Eff. Torque: 10.0 to 263.4 mNm Brushless dc motors are commonly used
where precise speed control, low electrical noise or long life is necessary.
They are typically 75-80% efficient and often use a permanent magnet
internal rotor, three phases of driving coils and hall effect sensors.
Brushless motors do not spark making them ideal for EMC sensitive
applications. |
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Electromagnetic Interference
The increasing trend towards miniature multi functional
devices brings with it the problem of electromagnetic interference (EMI).
There are many ways in which we can help you achieve electromagnetic
compatibility (EMC). Varistors
To reduce the effects of radiated noise we can offer DC motors with an
internal varistor ring.
Filters
The effects of electromagnetic noise can be reduced by fitting capacitors
and chokes close to the dc motor.
Wiring looms
We can design and manufacture wiring looms which incorporate twisted power
leads, electromagnetic shielding and ferrite beads, all of which offer
significant reductions in EMI. |
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Customisation
The modular organization that is at the root of this
catalogue allows you to select a transmission package that uses standard
components custom built to your specification; brushed or brushless dc
motor, flat or in-line gearbox, positional feedback, overload protection and
bespoke shaft.
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Linear Motion
There are a number of motors and gearboxes to drive your
leadscrew or belt and pulley system with optional programmable control:
- Where a lead screw is driven as an indirect drive, through a
coupling, our complete range of dc motors and gearboxes is available.
- For simple linear drives through a lead screw where thrust does not
exceed 50N, we offer our 229 and 220 gearbox with your lead screw
substituted for the output shaft. Lead screw up to 8mm diameters can be
accommodated with a pitch to your specification.
- Belt and Pulley applications may be met with gearbox bearings
designed to take side load together with a wide range of pulley options.
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Control of DC Motors
A new and unique approach to motion control
You will find here a new and unique approach to motion control. The design
philosophy has been to innovate, keeping a keen eye upon the application of
well understood technology. The resulting product is user friendly and
lowers the cost barrier by a mile, making serious motion management systems
available to all.
At the centre of our offering is the basic brushed or brushless dc motor.
Selected for its performance and usually interfaced with an appropriate
gearbox. Add an incremental encoder, sandwiched between motor and gearbox,
or an absolute encoder mounted on the back of the gearbox and all of the
hardware necessary for a servo is in place.
Red Drive brushed or brushless controller using feedback through the encoder
can now be used to maximise the full capability of the motor. The flow chart
protocol will allow you to deliver the sequence of events demanded by your
design.
Change during the development process is simple and when the design is in
place you can use the chip on your own board.
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Servo
Within this catalogue there is a wide range of brushed
and brushless dc motors, if the motor you need is not listed we will supply
a dedicated option. Modularity is at the core of our design philosophy
providing huge scope to add a gearbox creating a package that is unique to
your application.
The option of feedback across the range using incremental or absolute
encoders or potentiometers enables you to manage the full capability of the
motor that you select.
Brushed or brushless Red Drive offers you the opportunity of managing your
servo easily and cost effectively.
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Absolute Encoder
Our absolute output shaft encoder provides accurate
positional information unaffected by power loss and self correcting in the
face of electrical interference. They operate via contactless magnetic
technology providing either a linear analogue output (0-5V) or reliable
10bit positional data sent via a SSI (synchronous serial interface).
The single turn absolute encoder operates through the full 360° of rotation
and accurately monitors its position indefinitely without power.
The multi turn operates through 32000 revolutions whilst still providing the
maximum resolution of 10bits per 360° and is fitted with an integral
rechargeable battery to provide full position monitoring for 20 hours when
main power is removed.
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Incremental Encoder
In order to support twenty first century OEM’s in their
determination to maintain a competitive edge we have developed an extensive
range of single and dual channel incremental encoders. Both options are
available across the major part of the range of dc motors and gearboxes and
represent the most cost effective answer to the need for feedback.
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Potentiometer
Our positional servo incorporates a rotary potentiometer
which is connected to the gearbox output shaft to provide an analogue
reference signal directly proportional to the shaft position. The
potentiometer will monitor its position for an indefinite period even
without power.
A variety of potentiometer options are available to provide the choice of
single or multi-turn operation with a rotational life of 10 million turns.
The feedback potentiometer is coupled directly to the output shaft via a
backlash-free coupling offering single turn accuracy of around 3.6°;
resolution is only limited by your electronics. The multi-turn potentiometer
has a slip feature to prevent damage when reaching an end stop.
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DC Programmable Controllers
The drive board was designed with cost at the forefront
of the specification and manufactured in volumes that deliver this promise.
Use Red Drive throughout the product development process. At the final stage
you have the option to take the chip from Red Drive and incorporate it on
your own board.
Red Drive is a compact yet powerful motor driver and controller. It is
designed to be used with our encoders and wide range of dc motors and
gearboxes. Our unique flowchart graphical software allows the user to easily
program both simple and complex sequences of motion.
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Speed Controller
An open loop Pulse Width Modulated speed and direction
controller for use with brushed dc motors up to 1.5A.
Using the on board potentiometer it is easy to adjust direction and speed;
with the potentiometer set full CW the motor turns clockwise at full speed,
simply rotating the potentiometer to full AC will rotate the motor
anticlockwise at full speed. Positioning the potentiometer at 50% will stop
the motor.
Operating from a 7-24Vdc input voltage this controller uses PWM adjustment
running at 20Khz to provide high quality speed control. The motor will see
an average voltage proportional to the length of the pulses it is receiving
– speed is increased by lengthening the pulse.
The Speed Controller has a small footprint measuring just 63x46mm.
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Servo Systems
This catalogue shows ranges of product developed and
organised to allow the selection of individual components which together
build into simple or complex power transmission systems. The result is
unique access to bespoke programmable servo systems at a cost that brings
sophisticated control within easy reach.
Control
Red Drive; easy to use programmable brushed and brushless drivers that
enable the user to fully exploit their servo system.
Transmission
Brushed and brushless dc motors to 200W interfacing with a range of flat and
in-line gearboxes capable of using the power.
Feedback
Incremental and absolute shaft encoders, potentiometers and hall effect
sensors delivering feedback across the motor gearbox range.
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AC Motors & Optional Gearboxes
Ideally suited to a wide range of applications
This group of products is unique in the scope of its range. It contains both
Synchronous (constant controlled speed) and Shaded pole (asynchronous -
speed varying with torque) motors interfacing with extensive gearbox
options.
Product is offered across a wide voltage range and gearbox ratio options are
extensive. UL approval is available where appropriate.
Motors and gearboxes can be combined in a manner to offer the customer a
wide number of options.
A guide to the selection of the most appropriate combination appears later
in this section. Where space is limited we have a range of integral geared
motors. Low noise is often critical in both domestic and commercial
applications. The management of noise is a key part of our design philosophy
and manufacturing expertise.
Please speak to your sales engineer or call the sales desk if you need help
with the selection process or noise management.
Our aim is to supply our customer with a comprehensive “fit and forget”
service. Special lead lengths, connectors and dedicated output drives can be
fitted to your specification and supplied to your line as you need them.
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AC Synchronous Motor Schedule
No Load Speed: 250 to 720RPM
Running Torque: 0.78 to 25 mNm
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AC Shaded Pole Motor and Gearbox
Input Power: 15 to 95 W Motor Specification:
Frequency: 50/60Hz
Speed: 2900/3100rpm
Insulation: class B with 125°C thermal protection device
Motor Options:
UL approval
Class F insulation
Thermal protection
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Gearbox Information
Ratio: 10:1 to 720,000:1
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Integral Gearbox
Torque: 125 to 500 mNm General specifications:
Frequency: 50/60Hz
Input Power: 4W
Temperature rise: 60ºC
Insulation resistance: 100M Ohms at 500VDC
Dielectric strength: 840V AC 1min
Weight: 150g
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Permanent Magnet & Hybrid Stepping Motors
The widest range
The selection of the correct stepping motor requires specialised knowledge,
the options are considerable. Stepping Motors feature accurate digital
motion control, precise shaft position control, wide torque range and step
angle accuracy.
The motor requires drive electronics to control the electrical pulses which
switch the motor windings. This range offers open loop control systems which
are widely used in digitally controlled motion applications.
Within Rotalink the widest range of permanent magnet and hybrid stepping
motors are supported by a team with extensive experience in both design and
manufacture. Our engineers are well qualified to give you support in the
selection and application of motors. We have a number of drives for use as
design tools.
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Bipolar PM Stepping Motor Schedule
Step Angle: 7.5 to 15 degrees
Holding Torque: 10 to 50 mNm Bipolar – this is a sophisticated way to
drive the motor and achieves higher torque and speed than unipolar versions.
The phases inside the motor are always on but the polarity is reversed as
the stepping sequence dictates.
Bipolar drives often provide additional features such as micro stepping for
very smooth operation and higher voltage chopper drives to achieve higher
speeds. This motor normally has 4 flying leads. |
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Unipolar PM Stepping Motor Schedule
Step Angle: 7.5 to 15 degrees
Holding Torque: 10 to 200 mNm Unipolar – this is the simplest way to drive
a stepping motor. The phases inside the motor are either on or off, they are
not reversed. Unipolar motor are used in many applications where the higher
torque and speed of bipolar versions are not needed. A unipolar motor is
identified by 5 or 6 flying leads. |
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Gearbox Information
Ratio: 10:1 to 720,000:1
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Bipolar Hybrid Stepping Motor Schedule
Step Angle: 1.8 degrees
Holding Torque: 65 to 1650 mNm
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Unipolar Hybrid Stepping Motor Schedule
Step Angle: 0.9 to 1.8 degrees
Holding Torque: 40 to 1177 mNm
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Gearbox Information for Hybrid
Ratio: 10:1 to 3000:1
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Unipolar Drives
The stand alone SM02 Unipolar stepper drive has a
footprint of only 55mm x 40mm and can to be panel mounted. It can drive a
wide range of unipolar stepper motors, with 6 or 8 leads, at currents up to
1 Amps per phase and supply voltages from 9-24 Volts DC. The drive board and
motor share the same power supply. Connections are made by PCB mounted
terminal blocks.
The board is programmed to drive at speeds from 16 to 500pps controlled by
an external potentiometer. To assist customers we can also supply the SM02
with a fixed output speed or with other speed ranges. A standard 0.1” header
provides direction control, full step (1 or 2 phase) or half step modes via
jumpers or external control.
For the customer that needs a simple timing/control device we offer this
widest range of Cam Timers. Up to eight stations with the choice of either
synchronous or intrinsically safe pneumatic motors, both drives have
extensive gearbox ratio options. This rugged system gives huge flexibility
to the OEM designer.
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Associated Components
Shafts - A unique characteristic of Rotalink is the
ability to offer all our gearboxes with bespoke shafts tailored to the
customers’ application. Shafts can include threads, roll pins, double flats
and keyways.
Clutches - In certain applications a low cost clutch is often required,
Rotalink can offer both internal and external friction clutches designed to
protect either the gearbox or the application from excessive forces and
shock loads. Output gears and pinions - Supplied and fitted to customer
specification in both machined and injection moulded format.
Looms - A Rotalink package often includes a wiring loom made to the
customers’ specification. Typical looms include
strain relief, various wire gauges, crimps, connectors, heatshrink and
micro-switches. |
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Cam Timers
For the customer that needs a simple timing/control
device we offer this widest range of Cam Timers. Up to eight stations with
the choice of either synchronous or intrinsically safe pneumatic motors,
both drives have extensive gearbox ratio options. This rugged system gives
huge flexibility to the OEM designer.
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Cam Timers
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Services To OEMs
A centre of excellence for the design and
supply of miniature power transmission products.
There are times when you will have a specification that can only be met by a
unique solution. We have considerable experience of working on such projects
offering specialised design expertise supported by a first class prototyping
capability.
Our flexible approach involves understanding your needs in terms of
specification, cost, timing and finance at the outset. This enables us to
deliver you a design and supply service that is uncompromising.
Our design philosophy carries a triple message:
Take known technologies and repackage them in fresh and novel ways
Awareness of the opportunity presented by today’s materials
Cost and quality established at the design stage
Being quick to adopt both commercial and technical advances ensures that we
can support you in your determination to be a market leader.
Areas where we may be of special help include:
Cutting time to market
We actively develop and maintain our relationship with your project
management team. Our unique blend of experienced, multidisciplined engineers
use the latest 3D modelling software and in house prototyping facilities to
deliver motion control products to your project timelines.
Product cost
Price is a critical driver, and imaginative design is the key to low cost.
Our catalogue is proof of our ability to deliver products that meet this
market test. We operate at a global level, and source in the most
appropriate locations to deliver a real edge in the marketplace.
Design and development cost
We are always prepared to consider creative ways of moving a project
forward, and we are committed to joining you in realising your market
advantage.
Tooling, a positive stance
If you prefer to delegate the responsibility and cost of your tooling to a
key supplier you can rely upon our support.
Volumes
Market projections are volatile. We recognise this and join with you as you
develop your market.
From prototypes to full scale supply
A first class multi-disciplined manufacturing capability enables us to
deliver prototypes, preproduction, and where possible, full supply
programmes.
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