FERTIGUNGS- & MASCHINENAUTOMATION...Phoenix Contact, SAB Bröckskes, TecniKabel und TE Connectivity....
Transcript of FERTIGUNGS- & MASCHINENAUTOMATION...Phoenix Contact, SAB Bröckskes, TecniKabel und TE Connectivity....
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01 Sendix S36: Compact motor feedback systems in 36.5 mm size for all power ranges – reduce the number of motor variants, standardize the mechanical installation
Future-proof motor feedback systems
Compactness, efficiency and performance are the omnipresent requirements of
the machinery and plant engineering industry. This applies to the drives
technology too.
With its new motor feedback systems, Kübler offers drive manufacturers a future-proof and flexible sensor solution. They are based on a platform that allows reducing the number of motor variants and standardizing the mechanical installation and covers a wide range of electrical interfaces.
Text: Michael Scalet
ompanies today strongly invest in research
and development in order to be able to offer in the future optimal solutions for the IIoT. One of their goals is
to shape the future with new technologies for digitization
and networking. Machinery and plant operators
increasingly demand preventive maintenance by means of
intelligent data analysis. This will allow them increasing
further the availability and reliability of their production
SPS IPC Drives ↗Kübler: Hall 7A Stand 506
plants. Intelligent sensors allow fast error diagnosis, which
contributes to the reduction of unscheduled downtimes
and production outages. The drive manufacturers confront
this task with the development of smart motor concepts.
Trends in drive technology
The communication between a motor feedback system and
the drive controller can be a decisive factor for the
performance of the drive system. This applies in particular
in case of dynamic axes, smooth speed control and high
positioning accuracy. -
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So far, the choice of the components was often imposed
by the proprietary interfaces and not by the requirements
placed on the application. This is now counteracted by the
trend according to which drive manufacturers are
increasingly following a second-source strategy in order to
minimize costs and risks. In parallel, manufacturers are
opening their hitherto proprietary interfaces, leading to
higher flexibility and an improved costs structure.
The single-cable solution is another trend in the
electrical drive technology. It allows further cost savings
and at the same time simplifies the drive system, thus also
offering benefits to the user.
New motor feedback systems family
Kübler [1] is now reacting to these trends with a new
motor feedback systems family : it was developed in close
cooperative partnership with well-known servomotor
(Picture 2) and converter manufacturers. It is based on a
specific platform that offers various possibilities and
advantages for servomotors.
The particular feature of the new Sendix S36 Motor-
Line encoders (Picture 1) is their compact size of only
36.5 mm for a maximum resolution of 2048 pulses per
revolution or 24 bits fully digital. One single size allows
realizing several power ranges which, until now, required
at least two different encoder sizes of for example 36 mm
and 58 mm. The mechanical connection between motor
and encoder is independent of the required performance
range. Previous motors using a 58 mm-size encoder can
now be designed in a more compact way using the Sendix
S36 Motor-Line.
A tapered or a blind hollow shaft and various torque
stops are available for standardization. This ensures the
drive manufacturer more flexibility when selecting the
02 Kübler motor feedback systems for servomotors are space-saving and reliable
mechanical connection. The choice is also broader in
terms of functional safety. According to his choice for a
tapered or for a blind hollow shaft, the drive manufacturer
can select freely his preferred mechanical connection for
his safety concept.
Thanks to the platform concept, the Sendix-S36-Motor-
Line encoders can offer the following interfaces: RS-485 +
sin/cos, Biss, Biss Safety, Biss Line (single-cable solution)
and "SCS open Link" (single-cable solution). Thanks to
this wide choice of interfaces, the electrical interface is no
longer the limiting factor.
Servomotors are also used in applications where they
are subjected to high requirements in terms of shocks and
vibrations. This also results in high requirements for the
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Open-source motor feedback interfaces: the community goes on growing
The sensor and encoder manufacturers Baumer, Hengstler and Kübler presented at the Motek fair in
Stuttgart the open-source standardized interface "SCS open link" for the first time to the public. This
new interface allows the high-performance exchange of bidirectional data between motor and drive, for
example encoder position data.
The three market players see themselves as the initiators of
a growing community that supports the establishment of an
open-source interface standard. The goal is to ensure in the
future higher flexibility to the drive manufacturers when
choosing the suitable encoder for their application. A neutral
certification body will guarantee the compatibility of the
devices from different manufacturers.
"We feel in the servo drives market a strong demand for
compatible motor feedback systems, more flexibility and a
future-proof, non-proprietary standard. Summarized, there is
an urgent desire for an open, safe single-cable solution. We
meet these requirements with the new "SCS open link"
interface. In addition, we durably meet the market trends
relating to increasing performance and functional safety"
said Gebhard F. Kübler, Managing Director of the Kübler
Group at a press conference during the Motek fair on
October 10 in Stuttgart.
"SCS" means Single Cable Solution. "A high-performance
single-cable solution realized with two wires" describes G.
Kübler, who continues: "open means a non-proprietary,
open-source interface that promises to become a proven
certified standard. And 'link' emphasizes the meaning as a
motion protocol for the connection between a rotary or linear
motor feedback encoder and the drive controller." Moreover,
the high significance of safety has been documented by the
suitability of this interface for applications up to SIL3/PLe. To
illustrate the future-proofness of this new solution, he
mentioned the possibilities of condition monitoring and of the
connection of further secondary sensors. IIoT scenarios can
therefore be realized already today. This new interface also
stands out by a transparent license model that ensures the
openness also towards further providers.
Jochen Feiler, Manager of Hengstler GmbH, presented
the technical particularities of "SCS open link" and the
corresponding customer benefits. He first answered the
question: How open is open?
"Focus has actually been set on a future-proof and clear
regulation of the rights of use and on the fact that the three
founder members are basically favorable to the extension of
the sensor manufacturers circle.“ But it is obvious too that
the community has been launched from the customer's
perspective.
"The marked clearly indicated us that an additional closed
interface is not desired“, said J. Feiler. Besides, he
emphasized the advantages of "SCS open link" for drive and
machinery manufacturers: "The high flexibility thanks to
offers from different encoder manufacturers and the easy
implementation of 'SCS open link' based on a micro
controller, which ensures high innovative drive both on
machine and on motor level, are a central feature". J. Feiler
also recalls that the new interface is based on the Acuro link
interface developed by Hengstler and is entirely backward
compatible with it.
Jochen Feller (Hengstler), Gebhard F. Kübler (Kübler) and
Karsten Just (Baumer) present the new motor feedback
interface "SCS open link" (from left to right)
Karsten Just, Sales and Marketing Manager of Baumer
Group, also emphasized: "The union of three renowned
encoder manufacturers is an absolute novelty, which sets
the focus on the meaning of the term community. All relevant
information about this interface is available on a common
web site (www.scs-open-link.org). This web site is the contact
point for interested users as well as for further potential
licensees. The offer of 'SCS open link'-capable sensors and
the market development are driven ahead by every single
member. Therefore, all three founder members will present
individual products and solution approaches at the coming
SPS IPC Drives fair in Nuremberg." K. Just announced
following the press conference a small in-house exhibition.
Many connector and cable manufacturers already belonging
to the "SCS open link" community network presented
themselves there: the companies Helukabel, Igus, Lapp,
Phoenix Contact, SAB Bröckskes, TecniKabel und TE
Connectivity.
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03 The single-cable solution for servomotors with the new motor feedback systems by Kübler
encoder connectors. With Safety-Lock, Kübler offers an
optimal answer to this demand. Encoders with Safety-
Lock have interlocked and positively blocked bearings
and a special assembly technique. They withstand
installation errors and shaft loads due for example to
temperature expansion or vibrations.
New single-cable solution
Cables and connectors belong to the main cost drivers in
every automation architecture. A single-cable solution
allows saving material costs, installation work and, last
but not least, space (Picture 3). This solution allows
realizing both voltage supply and data transmission
though one single cable. This is decisive above all for
servomotors in the 40 mm-size.
The tight mounting space in servomotors requires
generally compact sensors and optimized connection
possibilities for the assembly. With "SCS open link",
Kübler now offers a new single-cable solution. It supports
2 and 4-wire applications and allows cable lengths
reaching 100 m, transmission rates up to 10 MBaud and
controller cycles up to 32 KHz. The protocol is certified
up to SIL3 and category 3 for functional safety. A neutral
certification body ensures the compatibility of the devices
from different manufacturers.
But not only the reduction of the costs related to the
connector, the cable and the integration makes the single-
cable solution so interesting. Space for routing cables is
often limited in the applications. The advantages are thus
obvious: Simplification of the connection technology and
less components.
Smart Motor
Besides the usual information such as position and speed,
the new motor feedback systems provide additional
information. They will in the future provide also functions
such as the electronic data sheet (EDS), saving customer-
specific user data and condition monitoring for monitoring
machine condition.
Moreover, connecting additional sensors such as e.g.
temperature sensors used for measuring the winding
temperature is possible. The sensor data is transmitted to
the servo inverter via the fully digital protocol of the
single-cable technology. According to Kübler, the Sendix
S36 Motor-Line encoders with single-cable solution are
ideally equipped for the requirements of IIoT and of the
smart motor. (ih)
Literature
[1] Kübler-Group, Villingen-Schwenningen: www.kuebler.com
Author
Michael Scalet is Global Industry Manager Drive
and Elevator Technology at Kübler Group.
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