HIPERFACE DSL¨ for premo servo actuators: Free access to diagnostic data

DSL¨ for premo servo actuators:
Free access to diagnostic data

The continuous
condition monitoring of electrical drives is growing in prominence, as the
purely digital HIPERFACE DSL¨ encoder interface makes it possible to
provide status data such as the temperature of servo actuators in a format
which can be evaluated by control technology. The fully scalable premo servo actuator platform from WITTENSTEIN
motion control not only uses the future potential of HIPERFACE DSL¨ ,
but also benefits from numerous design and safety advantages.

We need digital data and
protocols to enable us to “look into” a machine right down to the motor shaft.
Thanks to their HIPERFACE DSL¨ interface, motor feedback systems
such as the EKS/EKM36 and EFS/EFM50 product families from SICK fulfil this prerequisite, which is necessary to
ensure efficient condition monitoring. An
external temperature sensor can be connected to the encoders and the values
from the sensor – together with other process data from the drive such as
speed, voltage, mechanical revolutions, or present diode current (for optical
EKS/EKM36 and EFS/EFM50) – can be recorded and digitally transmitted to the
controller for evaluation. “All of this makes it possible to derive
information about the status and anticipated development of drive and machine
conditions,” explains Jšrg Peters, Head of Product Management at WITTENSTEIN
motion control GmbH in Igersheim. “Lots of machine manufacturers are becoming
more aware of intelligent, future-proof servo technology at the moment because
of the influence of Industry 4.0. With the help of their transmission
technology, drive solutions with HIPERFACE DSL¨ -enabled encoders offer a way of providing data which can be used for continuous condition monitoring and
preventive maintenance.” It is, therefore, no surprise that WITTENSTEIN motion
control offers optional smart motor feedback systems with HIPERFACE DSL¨
in all equipment packages of the new premo
servo actuator platform.

Fully scalable in performance-based increments: The “premo” servo actuator platform

With the newly developed, fully
scalable premo (precise motion) servo
actuator platform, WITTENSTEIN motion control can
configure motors and gears with application-based performance feature
increments from a specific modular system to form customised motor/gear units. “In theory,” says Jšrg Peters, “this
modularity means that there are over 40 million possible premo variants in total.” Regarding drive technology, the premo servo actuators boast exceptional power
density. They have also become extremely compact and flexible thanks to the
intelligent flex-module system and offer significantly higher torque than the
previous model series. “The equipment packages available – baseline, advanced line, and high line –
provide high connectivity for every application range,” explains Jšrg Peters. “In terms of the mechanics, shaft and flange
versions are available on the output side; when it comes to the electrics, the
spectrum ranges from the analogue
resolver – the basic equipment in the premobase
line – to the digital HIPERFACE DSL¨ interface which features
in the premo high line as standard.” In order to make digital one cable technology
available in all performance increments, the base
line entry-level class and the advanced line dynamic class can be optionally upgraded with HIPERFACE DSL¨
motor feedback systems from SICK Stegmann.

WITTENSTEIN motion control relies on “leading standard”

For WITTENSTEIN motion control,
digital one cable technology is an exciting prospect for many reasons. Regarding equipment, HIPERFACE DSL¨
halves the need for plug connectors and cables. This
not only cuts the number of components in the motor/gear unit but, also reduces the amount of wiring
required. Furthermore, when premo servo
actuators are integrated into robots,
moving axes, or mobile machine structures, the reduction in mass and weight
saves kinetic energy and improves the energy efficiency of the entire
powertrain. “In addition, the absence of
a second plug connector reduces the risk of fluid ingress in hygienic
environments,” says Jšrg Peters. When it comes to individual applications, each
machine manufacturer can configure the premo
actuators flexibly to ensure a future-proof communication interface for every
task, thanks to the motor feedback systems with HIPERFACE DSL¨ .
Finally, data communication via HIPERFACE DSL¨ is suitable in terms of safety for applications up to SIL2 in accordance with IEC 61508. “In my opinion,
HIPERFACE DSL¨ is becoming one of the leading standard protocols in
digital feedback systems for servo drive technology,” says Jšrg Peters in reference to the current market situation.
“As the developer of the digital interface, SICK Stegmann is not only one step
ahead in terms of the equipment
implementation, but is also able to provide support for HIPERFACE DSL¨
applications and their implementation at its own
test laboratory in Donaueschingen.”

premo + HIPERFACE DSL¨ : Perfectly prepared for
condition monitoring

Servo actuators
from the premo platform and motor feedback systems with a digital HIPERFACE DSL¨
interface make it possible – with the aid of the sensor input on the encoder
and a sensor (e.g., for temperature measurement) integrated in the drive – to
monitor the status and utilization of the machine part and to use this data for
condition monitoring where applicable by means of additional evaluation logic
in the control. Motor
characteristics, serial and part numbers, as well as additional data that
provides ready assistance for maintenance and replacement, can also be
transmitted via HIPERFACE DSL¨ with the help of the electronic type
label functionality. “There are a range
of technological, operational, and economic reasons why the operators of
machines and systems should familiarise
themselves with the planed servo actuator technology and its suitability for
condition monitoring without delay,” advises Jšrg Peters. “The ability to analyse sensor data makes it possible to
resolve disruptive factors and causes of damage more quickly.” The second goal
associated with condition monitoring is the optimisation
of machine efficiency to achieve maximum
productivity. “Continuous condition monitoring is essential for this, in order to achieve need-based maintenance and
thus optimal machine operation.”

New CM scenarios already put into practice

Smart servo actuators such as
the premo product family with digital
motor feedback systems and HIPERFACE DSL¨ will make it possible to
track and evaluate the development of relevant drive and machine parameter
trends even more comprehensively in the future. It is already feasible for the
motor feedback systems of the EKS/EKM36 and EFS/EFM50 product families to be
used to record and evaluate variables other than temperature – humidity, for
example. Other scenarios describe how torques, transverse forces, or load
profiles can be recorded and reported to identify material breakages, bearing damage,
or signs of wear in the powertrain at an early stage. With SHub¨ ,
SICK Stegmann is working on a multi-sensor concept which makes servo motors
even smarter, as the additional sensors provide new information for even more
intelligent maintenance concepts. In parallel, there is the possibility of
separating control-related and maintenance-related data, so that the
maintenance data can be made available as histograms in the cloud via Bluetooth
or NFC (near field communication) gateways, for example.

In this way, HIPERFACE DSL¨
provides the basis for entirely new business models in the fields of Internet of Things and condition monitoring –
which can, in turn, deliver benefits for smart servo
actuators if they, like premo, are
“HIPERFACE DSL¨ -ready”.

Written By:

Clemens Bitsch, Business
Development Manager, SICK Stegmann GmbH, Donaueschingen

Klaus Oberkštter, Managing
Director at TBO GmbH, Brachttal

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