A modern one Linear unit allows precise and repeatable movements. It not only increases efficiency, but also the accuracy of various movement processes. Find out more about new developments with linear units in this article different manufacturers and what benefits each offers.

Tretter linear unit

 

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Ready-to-install linear unit increases the range of the cobot

Schaeffler linear unitsJuly 01.07.2020, XNUMX | For the multiple expansion of the area of ​​application in the Robotic effect Schaeffler one powered Linear unit in program. Users can install the driven linear module tailored to their construction as a horizontal axis and thus the Range of Coboterhöhen.

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Cross table with large travels for measurement applications

Cross table10.03.2020 | Steinmeyer Mechatronics has its own with the KT470 cross table Measuring table KT310 put a big brother aside. With its large traverse paths of 300 x 300 mm, a repeat accuracy of ± 0,5 µm and an accuracy of ± 3,6 µm, the KT470 is primarily suitable for use in the Measurement Technology or for surface inspection. The new XY system meets the highest precision requirements.

With the KT470, measurement applications with electronic compensation for System accuracies down to 1 µm possible. This is the case, among other things, in semiconductors, measuring devices or in quality assurance.

The very good drainage values ​​of the cross table are the result of its well thought-out construction. Through the use of lapped cross roller guides and a ground one Ball Screw the measuring table achieves very few random process errors. In addition, it offers high rigidity and can be optimally compensated. The KT470 is optionally available with a central glass scale for particularly high demands on repeatability and measurement accuracy.


Koco Motion stepper motorStepper motor with control and encoder from the modular system


The XY system is optionally available with stepper motor or DC motor fitted. Of the DC motor is the first choice for applications with high speeds and small torques. If the positioning task requires low power and low speeds, then comes the stepper motor for use. In the precision cycle, the recommended load is 10 kg, the maximum load is 30 kg.

The positioning systems impress with their perfect flatness, the smallest tolerances for pitching and yawing as well as a smooth running behavior. In this way, they guaranteed maximum precision in measurement.

Linear unit for workpiece handling, machine doors and 7th axis

Rollon Seventh Axis Robotics


Aug 07.08.2019, XNUMX | In focus of Rollon stand on the EMO efficient movement concepts for workpiece handling systems and automatic machine doors as well as the seventh axis for handling robots. These work correctly over a long period of time with high cycles and under critical conditions. They are easy to assemble, replaceable and require little maintenance.

With the concept of seventh axis the manufacturer expands the range of action Industrial robotsn considerably. The entire robot moves on a linear axis and can thus take on tasks at several locations. The modular shuttle system enables long distances and high dynamics. It is available in seven different sizes, is easy to integrate and can be used for all types of Robotn move up to 2000 kg.

Linear units for machine doors 

Rollon workpiece handlingMachine doors also make a significant contribution to efficient production. Quick opening and closing shortens cycle times and thus increases productivity. In addition, the issue of security is a top priority. Systems like that Telescopic Rail or the X Rail move safely and evenly and are also highly resilient and extremely reliable. This ensures the highest dynamics and maximum safety of automatic machine doors.

Too often double-winged ones are used Machine doors each driven with one axle. With bidirectional axes from Rollon, one axis can be saved. They have two carriages that work either synchronously or independently of each other. In total, only one axis and therefore only one gearbox, one motor, one encoder for positioning determination and one servo needed. assembly, wiring, wiring and commissioning are also reduced to a minimum.

Even when Workpiece handling The linear systems open up new efficiency potential, for example when removing injection molded parts from their molds. What is important is maximum precision, robustness and reliability. The compact linear axes of the “Smart” series offer exactly the right performance features as a portal structure. They are extremely dynamic, highly resilient, very quiet and extremely durable.

Torsionally rigid, compact linear units with ball screw drive

Rollon0319April 01.04.2019, 70 | The linear axis "TH XNUMX" from offers a very good solution for automation applications with little installation space Rollon. It achieves high performance values, positions extremely precisely and is incredibly compact. The TH 70 from the Precision System of the "Actuator Line" was specially developed for smaller applications in which high precision and robustness are required for low load ratings, but only little installation space is available.

Thanks to their construction with a precision rolled Ball Screw as well as recirculating ball guides with ball chains, the compact linear units enable high positioning and repeatability with optimal operating properties and performance data.

Two arranged in parallel Profilerails with two or four preloaded linear guide carriages ensure the safe absorption of high forces and high load moments. In addition, the modular axes, consisting of a self-supporting aluminum profile, offer high inherent rigidity, a low displacement angle and low wear.

Separate lubricating channels for the ball screw drive and the recirculating ball guides provide the smooth running of the mechanical inner workings. This ensures that all relevant points are reliably supplied with lubricants and lack of lubrication is ruled out even during demanding continuous operation.

The internal components are also through a Plastic masking tape protected against environmental influences. The TH 70 is available as an SP2 version with one carriage and as an SP4 version with two carriages. It achieves a maximum stroke length of 591 mm (SP4: 550 mm) and a dynamic load capacity of 3140 N (SP4: 6280 N). Their repeatability is within 5 µm.

Due to their functionality, resilience and compactness, the TH 70 can be found in numerous applications in automation technology, including laser applications and measuring equipment, as well as for positioning tasks, precise handling or dosing stations.

Extremely resilient linear unit with spindle guide

Tretter spindle guide

24.08.2017 | Dr. Tretter offers a comprehensive range with the Movitec and Monocarrier series Linear unit Product range that can be used in a variety of ways for positioning and handling and easily integrated into various applications. Because they Spindle, guide and Axis profile unite, the user saves construction and assembly work. Various drives are available so that special solutions can be created quickly and flexibly.

"In order to be able to transport parts quickly in and out of systems and to be able to feed them to further processing steps with high accuracy, efficient assembly and handling technology is necessary," explains Serkan Boyaci, Product Manager at Dr. Tretter. "An extremely economical positioning system with specific properties can be implemented with a standardized linear unit."

Linear unit with different numbers of axes

The manufacturer, quality supplier and engineering partner offers this with the series Movitec and monocarrier a wide range of sophisticated linear axes such as the spindle guide. If the linear unit is combined with standardized connecting elements, users can set up single, double or multi-axis positioning systems based on the modular principle quickly and inexpensively and thus make processes much more efficient.

Depending on the application, the load and the required rigidity, the linear unit is set free of play or provided with preload. The linear unit is available, for example Toothed belt drive or spindle guide. With toothed belts properties such as particularly long strokes and higher speeds can be implemented in the linear unit. The spindle drive enables precision, higher permissible axial loads and repeatability. The units are used, for example, for pick-and-place tasks in the Measurement Technology or as loading and unloading handling on machine tools.

Highly dynamic linear unit for high loads

“If you are looking for a precise and highly dynamic linear unit for high loads, which also weighs little and can be individually adapted according to the modular principle, the linear units of the Bi-rail Series found what they were looking for, ”explains Serkan Boyaci.

With this inexpensive standard solution In contrast to the solutions available on the market, drawn and anodized aluminum profiles with a fully machined assembly surface are also available. As a result, this linear unit achieves a high level of assembly accuracy, just like a stiff axle profile made of steel. With the same size, the compact bi-rail linear guides are significantly more resilient than other models. “When installed horizontally, this solution is very resilient as a Z or Y axis,” explains Serkan Boyaci.

This is particularly evident when accelerating or quickly moving high loads. The bi-rail Linear Technology can in particular in the Y direction high overturning moment loads take up. The user thus achieves a highly dynamic acceleration when starting.


Rodriguez leadership wavesHard chrome-plated h6 guide shafts from our own production


Thus, when used in systems for Automation and handling - for example for Pick-and-place tasks faster cycle times possible. This is due to the special and unique positioning of the guide elements in the profile. Two are installed linear guides and four recirculating ball slides of different sizes - or high-load roller guides, which are installed on the side of the profile for transverse loading.

“With this arrangement, the lines of force form two superimposed lines from below and from above Lines of force triangles: In the middle the lines of force overlap and thus strengthen each other. Therefore, the modules are particularly resilient in the Y direction, "explains Serkan Boyaci:" and that ensures optimal force and torque absorption. "

This makes the linear units very suitable as load-bearing components in the Vertical axis and to build portal systems. With this arrangement, the system can also be made more compact and weight-saving and smaller in terms of its overall dimensions.

Tretter spindle guides

The series is available with rolled as standard screw. These offer a repeat accuracy of up to 0,015 mm. A more precise spindle drive can also be used on request. Speedy spindles with up to 5 m / s can be used for particularly high travel speeds. “This is what sets us apart from competitor products that already use timing belts for them,” says Serkan Boyaci.


Rollon stainless steel linear guideStainless steel linear guide from Rollon is indestructible


“We only equip them with solutions with larger strokes Belt drive from. “Sizes 70, 90, 130 and 160 mm are available. They can of course also be supplemented with the other products from the Movitec series and adapted according to individual customer requirements

Extremely resilient linear table with a wide range of drives

Tretter linear guideThe linear tables from the are suitable for high repeat accuracy and very high payloads Movitec Model series. These are made of aluminum or steel and can be used as load-bearing components. They are available in sizes 100, 150, 200, 250, 300 and 400 mm as well as rust-resistant miniature tables in sizes 50, 75 and 100 mm.

Thanks to the large selection of drives for the linear tables, the right solution can be found for every application. Depending on the loads and work cycles, different spindle variants are available - for example satellite rollers and Acme screw, but also pneumatic, electromagnetic and rack and pinion drives.

On request, the linear units can be supplied with a optical measuring system fitted. “They have proven themselves very well in positioning and handling technology,” says Serkan Boyaci. The linear table TVP250S, for example, has a stroke of 500 x 800 mm. Because it is highly resilient and precise, it is used as a cross table for milling machines. The linear table TVP150-2 x TVP100 was equipped with an optical measuring system. This solution can position accurately to the micrometer.

Linear axes with high force and torque load

With the C / H series from the Movitec series, the company has the cheapest execution on linear axes for medium loads and high travel speeds in the program. Users can choose between two versions: in the standard profile (C series) or for higher loads with a higher profile (H series). The latter can also be used as a load-bearing component. These are available in sizes 40, 60, 86 and 116 mm.


Igus Clips slideIgus linear guide as a quiet, maintenance-free alternative


The widely spaced guide arrangement with Four point contact at a 45-degree angle and large ball diameters results in a high permissible force and moment load. “In this way, the guides can be subjected to pressure, tension and lateral forces relatively equally in every direction. This makes the designer's work a lot easier, ”says Serkan Boyaci. Dr. Tretter supplies all sizes as a spindle axis with two recirculating ball slides. Their designs vary from short, standard, long to extra long. The operating temperatures are between minus 20 ° and plus 80 ° C.

Precise and compact linear axes

Tretter linear unitsThe series monocarrier is a compact axle unit made of steel, which enables precise guidance and feed movements. These axes are available in two versions: as a compact MCM unit in six sizes and as a compact, highly rigid MCH unit in which the cheeks of the axis profile are higher.

Three sizes are available here. The maintenance-free linear axes are used in small machine tables or in pick-and-place units - for example in analysis technology, semiconductor production or in circuit board assembly. “With the appropriate boundary conditions, they are also used in the clean room or in the Food industry used ”, emphasizes Serkan Boyaci.

Linear unit accessories for minimal maintenance

For one as far as possible maintenance-free operation all linear units have a lubricant supply. Around Power Type and guides to protect against dirt, all Movitec products can be provided with metal or bellows covers. On request, the user can get this without a cover. “On request, we can combine the linear unit with a customer-specific electric drive of all common makes. This means that they can be easily integrated into existing systems, ”explains Serkan Boyaci.


Bosch Rexroth linear guideChoosing the right linear guide just got easier


With the linear units of both series, users get jerk-free, leak-free and quietly running components and systems that require little maintenance and have a long life. Thanks to the modular design, application-oriented linear systems can be implemented at extremely economic conditions and in the shortest possible time. They are ideal basic components for customer-specific solutions and can be implemented dynamic multiple positioning for very different applications.

Freely configurable linear table made of stainless steel

Igus linear tableMarch 29.03.2017, 166 | One of the XNUMX new products Igus presented is the stainless steel version from the “Drylin SHT” spindle linear table series. In addition to the plastics optimized for friction and wear, which can be selected from different materials depending on the application, the linear table is made entirely of stainless steel. The Drylin SHT-ES is suitable for use in the food industry and for high-temperature applications.

From the spindle, shafts and slides to the traverses, all components are made entirely of V2A stainless steel. The moving parts are supported using tribo-optimized plastics. For example, users have the choice between Iglidur, which means that the linear table can be used in applications up to 200 °C and is also particularly resistant to chemicals or food-grade materials Iglidur A180 for use in food and packaging technology.

The spindle linear table works completely without external lubrication. The modular design, the freedom of choice in the stroke length and the drive, which can optionally be realized by handwheel or motor, ensure the right individual solution at any time, which can be installed immediately. The drive pin can also be provided with pins, grooves or wrench flats depending on customer requirements.


Igus linear bearingsLinear bearings for round shafts and fast movements


The spindle linear table is available in four sizes (shaft diameters of 8, 12, 20 and 30 mm) For the thread, users can choose between self-locking trapezoidal and high-speed coarse threads, each in pitches from 2 to 100 mm and with either right or left or reverse thread.

The linear table can be connected to the Drylin SHT configurator put together individually. It shortens the selection, configuration and ordering of the linear stage to just a few mouse clicks. Following the selection, users receive both detailed documentation of their selection as well as a 3D view of their configured linear table and are directly shown the price and delivery time before they are redirected to the shopping cart. For even harsher environments, the motion plastics specialist is currently developing a version of the Drylin SHT-ES made of extremely corrosion- and acid-resistant V4A.

Multiple independent carriages on one module

IEF Werner linear unit28.05.2013 | IEF Werner offers versions of each of its drive concepts with which several slides can be moved on one linear unit. Because only one linear unit is required, this opens up completely new perspectives for designers:

The design effort is reduced and systems can be made more compact. Are the linear units with spindle or Timing beltsequipped with a drive, a maximum of two carriages can be moved independently of one another, or more in the case of linear motor drives.

Variant G of the linear unit 160/15, for example, has two toothed belts that are driven by two motors. If the application requires it, two linear units do not have to be arranged next to each other, one unit is enough.

This saves the fitter considerable time because there is no need for alignment. The space requirement is also significantly smaller than with separate units. This means systems can be made significantly more compact. The linear axis is also equipped with integrated collision protection.

Another variant of this module is the GPA version. This allows two Area portals operate in the same workspace. This is made possible by a parallel drive that drives the two pairs of carriages separately. With this version, machines can also be made more compact and assembled more efficiently. These efficient versions are used, for example, in assembly machines, transport lines or dosing and filling systems.

Source: This article is based on information from the following companies: Dr. Tretter, IEF-Werner, Rollon, Schaeffler.

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