SIEMENS
11/20
Siemens D 31 · 2015
SIMOTICS motors
Mechatronic components
Linear motor complete axes LTS and LTSE
11
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Overview
Linear motor complete axes LTS without bellows cover
The linear motor complete axes LTS/LTSE supplied by SKF are
units comprising a slide top and a base which are supplied
ready for installation and operation. A profile rail guide, the
primary and secondary motor parts, a linear encoder including
limit switches, limit position dampers and cable trailing device
connection are fully integrated into the linear complete axis.
A variant of the SIMOTICS L-1FN3 linear motor series based on
convection cooling is used. These axes are thus suitable for use
in precise, highly dynamic short-stroke applications which re-
quire a high degree of repeat accuracy as well as for the imple-
mentation of dynamic linear motions for positioning workpieces
and tools.
The linear motors are deployed in combination with
SINAMICS S120 inverters.
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Benefits
•
Excellent dynamic response, positioning accuracy and
control stability
•
Outstanding synchronization characteristics coupled with
high static and dynamic stability
•
Incremental and absolute position measuring systems are
available
•
Modular system offering numerous options, lengths and
widths
•
Multiple slide tops (of different sizes if required) on a single
base
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Application
The linear motor complete axes LTS/LTSE are used whenever
alternative options such as toothed belts and screws are too in-
accurate, too slow or too inflexible in order to raise the through-
put, the cycle time, the accuracy or the product variance of a
machine or a testing facility. The low-wear design (minimum
quantity lubrication required only on guides following assembly)
also reduces maintenance requirements.
Typical applications for the LTS/LTSE are, for example:
•
Workpiece transfer within assembly processes
•
Laser machining – to achieve linear accuracies within a range
of a few μm
•
Measuring instruments – positioning/traversal of sensors,
vision systems, probes
•
Medical engineering – reliable, low-noise positioning in
confined installation spaces
•
Clamping systems (holding a part between two jaws
(primary parts)
•
Pick and place applications in (or at beginning or end of)
production lines
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Design
The linear motor complete axes LTS/LTSE consist of a stable alu-
minum base which supports a guide comprised of two profile
rails, the secondary parts arranged between the rails, the linear
measurement system and the inductive limit position sensors.
The 4 roller units (ball screw) belonging to the profile rail guide,
the measuring probe of the linear encoder and the relevant
primary part are all integrated into the slide top. The power and
temperature sensor connectors are fitted to the casing of the
slide top.
The scope of supply includes an adapter cable for the tempera-
ture sensor integrated in the primary part and (if required) for the
measuring system to the encoder evaluation system (SME
120/125).
Convection-cooled linear motors from the tried-and-tested
SIMOTICS L-1FN3 linear motor range developed by Siemens
are used in the design. Each of the two series is available in
three frame sizes and different lengths.
The LTS series is capable of higher operational accuracy
(<20
μ
m). The LTSE series is more flexible in its basic design
which means that it can be adapted more easily to meet indi-
vidual customer requirements and also allows the use of other
SIMOTICS L-1FN3 motor types.
Linear motor complete axes are supplied as standard with
bellows cover.
© Siemens AG 2014