The new generation of servo planetary gear units from STÖBER Antriebstechnik offers drives that are the most compact on the market in their power range and with their diversity of combinations and options. What’s more, any motor series can be directly attached in any available size. This variability allows STOBER to create the right drive solution for any application. In contrast to the prior generation, STOBER also equips the new planetary geared motors with an electronic nameplate, which makes commissioning controllers and drive controllers much faster.
STOBER has developed the third generation of servo geared motors, which are the most compact drive solutions on the market with their level of versatility. To achieve this, the lengths of the new gear units were significantly reduced. All STOBER motors, such as the EZ series or sensorless Lean motors, can be directly attached without an adapter, in any desired size.
Thanks to this compactness, the user benefits from a smaller installation space, lower weight, greater torque and a resulting power density that is increased by up to 65%. The mass moment of inertia is lower because the motor adapter is no longer needed, which allows the full dynamics of the drive to be used. This is a real advantage for the customer, particularly noticeable with small and medium sizes in shorter cycle times.
The new generation also features the highest backlash stability and ruggedness. The excellent housing and gearing quality ensure high acceleration torques as well as the highest running accuracy and precision at the same time. Users benefit from acceleration torques increased by 60%, a speed increase of 45% and an increase of the torsional stiffness by up to 50%.
Flexibility from the Motor Attachment to the Bearing System
The most impressive feature of the new generation of planetary gear units is its enormous variability. This means that not only are the gear units able to be combined with different STOBER motors via direct attachment, they can also be attached to all third-party motors in any size using variable adapters. The drive specialist offers a one-of-a-kind interface technology for this purpose. STOBER motor adapters are available with different couplings as well as in the ServoStop variant with an integrated brake. The adapters can also be combined with standard or reduced-play gear units. In particular, the large design of the STOBER adapter with an extra-large motor plate makes it possible to connect the most compact STOBER gear units with motors of very large sizes—a truly unique selling point.
Depending on the application, another advantage compared to the competition is that the right bearing can be selected, whether deep-groove ball, cylindrical roller or angular contact bearing. These low-friction bearings enable generally higher speeds.
Thanks to this enormous variety, engineers have all the options in the design phase to put together exactly the right drive solution for any application. A smaller motor to optimize efficiency? A smaller drive controller might go well with that—which also lowers costs.
Easier Commissioning Thanks to Added Electronic Nameplate
Another special feature of the new generation is the electronic nameplate. In combination with the STOBER electronics, every geared motor automatically sends its electronic, mechanically relevant data by plug and play to the corresponding drive controller upon commissioning. As a result, the geared motors are uniquely identified. This eliminates high-effort, error-prone parameterization, which shortens the total system configuration significantly.
STOBER will present the new generation of servo planetary gear units for the first time at the SPS IPC Drives in Nuremberg, hall 3A booth 451 at the end of November. Sizes 2, 3 and 4 will be available from 1st October 2019, sizes 5 and 7 from 1st March 2020 and sizes 8 and 9 from 1st May 2020.
Specifying geared motors to reduce HACCP risk factors
Geared motors are found throughout food and beverage production sites, used to drive conveyor belts, stirrers & agitators, packaging machinery and other equipment along the production line. The geared motor design lends itself to energy efficiency and reliability, a must for any modern production facility. However, the food & beverage industry also requires strict hygiene compliance, meaning that specialised geared motors are a wise choice for such facilities.
Markus Kutny, Director of Sales Vertical Markets for Bauer Gear Motor, a premier brand of Altra Industrial Motion Corp., examines how specifying geared motors in stainless steel design or specialised finishes can help reduce HACCP risk factors.
The Hazard Analysis and Critical Control Points (HACCP) system is an internationally recognised method for reducing risk factors in the production or processing of food. It works on the principle of on-going improvements, encouraging manufacturers to continuously re-evaluate each of the processes in its production line to identify possible hazards and minimise risk. The primary purpose of the system is to protect people from food-borne illness, though it is also recognised as a ‘best practice’ approach to improve quality and consistency in the final product.
Understanding the importance of the processes surrounding the analysis of risk in the production line helps to explain the evolution of geared motor technology used within the industry. Specifically, it explains why the industry requires that geared motor manufacturers invest in R&D for aseptic solutions – developing specialist coatings and even stainless steel variants of their latest products.
The HiflexDRIVE range from Bauer Gear Motor is an example of geared motors with design evolutions specifically aimed at improving performance in hygiene-critical applications. The range is carefully designed so that fans and cooling ribs are not required, thereby allowing for completely smooth outer casings with non-drive ends that are sealed. This allows the IE4 super-premium-efficiency motor to be offered with up to IP69K rating – which protects against high-pressure washers and steam cleaning. The elimination of venting elements creates a smooth outer surface, which provides a higher cleanability of the motor casing and prevents re-infection of the local environment caused by air movement from a cooling fan.
While specialist coatings perform exceptionally well when correctly applied and maintained, there is always a risk that the coating could become damaged while the motor is in operation. Should this happen, then the contamination resistance of the geared motor would be reduced. Adopting the principles of HACCP, many manufacturers are choosing to specify stainless steel geared motors where they are likely to be operating in an area with risk of mechanical damage.
For manufacturers or packaging specialists looking to minimise HACCP risk factors when specifying geared motors, there is no question that it pays to choose a specialist solution. The HiflexDRIVE range is available in three sizes ranging from 80 Nm to 330 Nm in standard, aseptic and stainless steel designs; with power ratings up to 6.3 kW depending on the size selected. A two-stage gearbox design allows ratios of up to 109:1, depending on gear type, and allows a wide range of applications to be covered.
Whether the application would benefit most from a stainless steel design or an aseptic coating depends on the sort of working life it will be exposed to. Our engineers help customers to assess their environments and provide expert guidance on the most appropriate choice with consideration to efficiency, reliability, risk and long-term cost saving.
From another Point of View
STOBER presented the new generation of its servo planetary geared motors at the SPS IPC Drive in Nuremberg at the end of 2019. One of the special features of this generation: Each motor series can be directly mounted in any available size. With this variance, STOBER offers ready-to-install drive solutions for machine tools and packaging machines as well as applications in automation and robotics. In order to ensure that the assembly of the new gear units remains efficient even with an increased variety of combinations, the specialist from Pforzheim relied “on digital” when planning the new production line and gained new perspectives through virtual reality.
With the third generation of its servo geared motors, STOBER has developed high-performance and precise drive solutions that are the most compact on the market in terms of versatility and convince by their enormous variance. The gear units can not only be combined with different STOBER motors in direct mounting, but also with all third-party motors of any size via a one-of-a-kind interface technology. A perfect fit for any application.
During the development of the new drives, the STOBER design engineers faced a wide range of challenges: Compared to the previous version, for example, the performance had to be improved and the components had to be built significantly more compact – at the same cost. A balancing act which STOBER mastered primarily by means of new production technologies and optimized assembly lines. “Especially the work and assembly planning, not to forget the optimization of the ergonomics at each of our workplaces, is one of the most important, but unfortunately also one of the most time-consuming tasks”, says Marc Schneider, team leader in gear assembly at STOBER. “Instead of building physical prototypes on the basis of our CAD or Excel data and modifying them again and again, we relied on virtual reality for the design and optimization of the assembly lines in advance”.
Virtual Reality as an agile development partner
With a VR tool by R3DT, a start-up based in Karlsruhe which STOBER chose, entire systems can be simulated as early as the conception phase. By means of VR glasses environments can be experienced one-to-one. A “simple” principle with great effect: 3D CAD data from workstations, for example, are imported into the VR software along with other relevant key figures and processed. At the push of a button virtual prototypes are ready to be used.
“VR glasses on and we are already standing in the virtual environment at the previously designed workstations. With our hands we can reach for virtual tools, check the screwing – without joysticks or other controllers”, Schneider explains.
Frequent testing allows design errors to be detected in good time; corrections in the design or even in the ergonomics of a workstation can be made directly – even in the early planning phase. For STOBER numerous aspects that needed improvement came to light before real prototypes were built.
The resulting real prototypes are very close to being ready for production. In addition to saving an enormous amount of time and avoiding costly subsequent modifications, Marc Schneider is pleased to be able to involve his co-workers right from the start.
“We are very motivated to make our everyday work more ergonomic. Another advantage is that the VR tool gives the entire team the opportunity to experience and learn about new technologies in early stages. In addition, we can now react more effectively in assembly to the ever-changing product mix that our customer requires. An exciting project!”
Wärtsilä’s Data-Driven Dynamic Maintenance Planning solution optimises engine maintenance
The technology group Wärtsilä introduces its Data-Driven Dynamic Maintenance Planning (Data-Driven DMP) solution. This latest developed feature enhances the company’s existing Dynamic Maintenance Planning solution by utilising digitalisation and Wärtsilä’s extensive capabilities in analytics. It is an integral part of the company’s Lifecycle Solutions value proposition, and adds further customer benefits and value not possible with conventional DMP solutions.
Data-Driven DMP increases the uptime of assets and reduces lifecycle costs by optimising major overhaul intervals, without compromising operational reliability or engine efficiency.
Furthermore, assets are maintained in prime condition without the need for on-site visual inspections performed by Wärtsilä personnel, since the solution’s digital capabilities reduce the need for such on-site visits. Customer personnel can be trained to take fluid samples and to carry out borescope inspections of engines with remote support from experienced and specialised experts in Wärtsilä’s Expertise Centres.
Leveraging the new capabilities and keeping the engines in prime condition eliminates the need for the usual opening inspection of the engine.
“Data-Driven DMP adds a new dimension to our Lifecycle Solutions’ value proposition, delivering greater flexibility and increased cost savings for the customer. Existing DMP contracts can be changed to take advantage of the extra benefits provided by Data-Driven DMP, should customers wish,” says Frank Velthuis, Director Digital Product Development, Wärtsilä Marine.
The technology for Data-Driven DMP is supported by Wärtsilä’s Expert Insight product, which enables proactive and rapid advice and assistance to be delivered to customers from the Expertise Centres. Expert Insight has been credited with taking predictive maintenance to the next level.
Wärtsilä’s Lifecycle Solutions offering is backed by a combination of the company’s extensive in-house know-how along with AI and predictive analytics. It takes a holistic approach to ensure sustainable and reliable operational performance.
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