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Linear
Motors & Stages
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| Linear Motor Products |
Baldor provides industry with
the widest range of linear motors, linear stages
and controls. Being a leader in linear motor
design and manufacturing, Baldor continually
develops advanced products and innovations to
meet a variety of linear motion applications.
Linear motors provide unique speed and positioning performance advantages. Linear
motors provide direct-coupled motion and eliminate mechanical transmission devices.
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They offer substantial improvements
over applications using ball screws, timing belts, etc. The rugged mechanical
design provides accurate motion and precision positioning for hundreds of millions
of cycles. Baldor linear motors and stages are used in thousands of successful
applications worldwide.
Click here for an overview
of Baldor's full line of Servo / Motion solutions.
Linear motors provide the following advantages:
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High repeatability – resolution to 0.000004 inch (0.1 microns) – this
makes sure all parts produced are accurate and identical |
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Highly accurate – to 0.0001 inch/ft (2.5 micron/300 mm) – provides
precise machine operation for precision parts |
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No backlash – direct drive has no backlash such as with lead
screws, gears, etc. this improves the accuracy of the part or operation |
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Faster acceleration – from 1 to over 10 G’s – this
leads to shortened cycle times and improved productivity. |
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Higher velocities – speeds to over 300 inches/second (8 meters/sec) – to
position the payload faster |
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Long term reliability – only two parts with only one moving
part – this leads to simplicity and improves the applications
reliability |
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No wear or maintenance – no contacting parts, thus reducing
component friction and wear |
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Ease of installation – linear motors are designed to allow
for alignment tolerances. Misalignment produces no degradation of performance |
Linear motors consist of two parts – a
stationary track or “platen” and a moving “forcer”.
They can be provided as a stand-alone linear motor assembly or as a complete
stage – built with a housing or enclosure with linear bearings,
limit switches, cable track/carrier, protective bellows and linear encoder
in a wide variety of lengths.
Linear Motors
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Brushless Cog-Free – LMCF
series
Baldor’s cog-free brushless linear motor
is designed for unlimited travel servo applications
that also require extremely smooth operation
with no cogging. Modular track assemblies stack
end-to-end to provide the length of stroke required
for the application. These motors are supplied
in “kit” form to be easily integrated
into a machine. The LMCF series provides high
peak forces to 2300 N (517 lbs); speeds to 5
m/sec (200 inches/sec); and acceleration to 10
G’s. |
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Brushless Iron
Core – LMIC series
Baldor’s brushless Linear Motor Iron Core
motor is designed with advanced technology techniques
to minimize cogging, while improving dynamic
speed and force capability. The LMIC series has
been uniquely designed to providing smooth operation.
This series is available in two configurations,
a standard profile, and a low profile – for
those application requiring smaller, tighter
packages. It has unlimited travel utilizing modular
platens. LMIC provides high very peak forces
to 13,800 N (3100 lbs); speeds up to 8 m/sec
(320 inches/sec); and acceleration up to over
10 G’s. |
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AC Linear Induction
Motors – LMAC
series
Baldor’s linear induction motor is designed
for extremely long travel applications such as
material handling and people movers. The linear
induction motor consists of a “primary” which
is a coil assembly, and a “reaction plate”.
When AC voltage is applied to the coil, a traveling
magnet field is created which induces current in
the reaction plate. The interaction of the two
magnetic fields generates the force and directs
linear motion. An adjustable frequency inverter
will provide velocity control of this linear induction
motor. The LMAC series provides very high peak
forces of 2224 N (500 lbs); speeds to 6.8 m/sec
(270 in/sec) and acceleration to 1 G. |
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Linear Stepper
Motor, Single Axis – LMSS
series
Baldor’s open loop linear stepper motor
provides the most economical linear motor positioning
package. The “forcer” consists of a
2 or 4 phase motor assembly encapsulated in an
aluminum housing supported by bearings. The “platen” consists
of photo-chemically etched teeth on a steel bar
available in lengths cut per customer specification.
The LMSS series provides forces to 220 N (50 lbs);
speeds to 1.5 – 2 m/sec (890 in/sec); acceleration
to 1 G. |
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Linear
Stepper Motor, Dual Axis – LMDS series
Baldor’s dual axis stepper package provides
open loop positioning along two axis of travel.
An integrated air bearing system floats the “forcer” less
than 25 micrometers (0.001 inch) above the photo-chemically
etched steel plate. Preload for the bearing system
is provide by the magnetic attractive force between
the forcer and the platen. The LMDS may be mounted
face up or inverted. A position verification system
is available to close the loop.
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