SIEMENS
11/17
Siemens D 31 · 2015
SIMOTICS motors
Mechatronic components
Electric cylinders
11
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Overview
Axial mounting of a SIMOTICS S-1FK7 motor on the linear unit with
mounting kit and accessories
Parallel mounting of a SIMOTICS S-1FK7 motor on the linear unit with
mounting kit and accessories
The electric cylinder comprises a CASM linear unit supplied by
SKF and a SIMOTICS S-1FK7 motor.
The CASM linear unit converts the rotary motion of the
SIMOTICS S-1FK7 motor into a highly dynamic linear movement
and is a perfect substitute for pneumatic or hydraulic cylinders
in many applications. By contrast with pneumatic and hydraulic
cylinders, electric cylinders allow the driven machine to ap-
proach any position with extreme precision solely on the basis of
setpoints transferred to an inverter from the SINAMICS S110 or
SINAMICS S120 range.
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Benefits
•
Modular system with wide variety of options.
•
Substitute for hydraulic and pneumatic cylinders in most
applications.
•
No compressed air/hydraulic fluid required – helps to cut
costs (no need to supply compressed air or hydraulic fluid),
reduces noise emissions significantly and lowers energy
consumption in operation.
•
Highly dynamic, precise positioning with high repeat accuracy.
•
Mechanical conversion is simple because electric cylinders
are essentially the same size as pneumatic cylinders. Further-
more, the relevant pneumatic cylinder accessories can also
be used for electric cylinders.
•
Adapters are used to attach the SIMOTICS S-1FK7 motors to
the linear unit supplied by SKF, making it very easy for the
customer to assemble the motor/linear unit combination.
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Application
The electric cylinders (CASM linear unit supplied by SKF in
conjunction with SIMOTICS S-1FK7 motors and SINAMICS
S110/SINAMICS S120 inverters) are used for any application
which requires a linear motion and/or a defined force. Their
areas of application are the same as those for pneumatic and
hydraulic cylinders.
They are used, for example, in production machines such as:
•
Machines used in the wood, glass, and ceramics industries
•
Metalworking and coating machines
•
Printing machines
•
Plastics processing machines
•
Packaging machines
Examples of functions:
•
Positioning of cutters
•
Edge guidance/edge cutting
• Retainers
•
Buffers/sorters/slide gates
•
Nozzle holders
Notes:
•
Technical advice must be sought for applications involving
continuous short-stroke movements (less than three times
screw pitch).
•
The electric cylinder must be assembled (depending on the
stroke length) in such a way as to minimize lateral forces.
•
The electric cylinder is not self-locking – it might be necessary
to provide a motor holding brake.
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Design
Electric cylinders essentially comprise the CASM linear unit (with
a lead screw or ball screw) housed in an extruded casing and a
SIMOTICS S-1FK7 servomotor attached to the linear unit by
means of an adapter kit.
The motor can be mounted on the linear unit in two different
ways:
•
Axial mounting – see first picture beneath Overview:
Motor is attached using an axial adapter kit (containing all the
necessary parts including the coupling)
•
Parallel mounting – see second picture beneath Overview:
Motor is attached using a parallel adapter kit (containing all
the necessary parts including timing pulley and toothed belt).
Depending on the linear unit and SIMOTICS S-1FK7 motor used,
higher forces can be obtained with the axial arrangement option
than with the parallel arrangement driven by a toothed belt.
© Siemens AG 2014