Motion Control – Linear-XYZ-Rotary Combination Stages from Intellidrives!

Intellidrives 4 Axis XYZ-Rotary System

 

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Philadelphia, PA, — Motion Control Components and Systems – Intellidrives’ compact, high precision XYZ-Rotary stage is a combination of Intellidrives: LSMA XY lead-screw driven stages, an MLVT Lift stage, and an RTHM worm gear rotary table.

Features include:

– XY stroke 100×100 mm

– Lift 13 mm

– Unlimited rotation

XY Lead-Screw Driven Stages – The LSMA miniature linear actuators designed for the space confined applications while retaining the high reliability required in production environments. It is an ideal choice for measurement, testing, alignment and component assembly in any application on the factory floor or laboratory environments.

The precision ball screw or micrometer grade lead screw provide excellent accuracy and repeatability with ultra-fine positioning resolution capability of 0.1 micron or finer when driven by the stepper motor. The servomotor version is equipped with a rotary encoder and provides exceptionally smooth travel.

Lift Stage – The MLVT Vertical Lift Stages offers precise vertical translation for payload elevation. A unique wedge design or direct drive motorized screw converts motor rotation into true vertical elevation of the platform. Precision bearings provide platform stiffness and stability while the screw mechanism assures positioning accuracy.

Rotary Table – The RTHM series rotary stages provide arc-second resolution when driven from a micro-stepping or a brushless servo motor controller. The low profile design is made possible by the use of compact precision bearings. The rotating carriage of the stage provides continuous rotation of load up to 10 kg and has large clear aperture to allow the passage of the optical path or cables directly through the stage. The main body of the stages is made from lightweight anodized aluminum and can attach directly to an optical table or moving linear or XY actuators and can be mounted at any orientation. A precision worm gear assembly is used to transfer the rotary motion of the stepper motor into rotary motion of the carriage. The small size allows use in confined spaces, such as laser cavities, disk texturing machines, manufacturing areas for fiber optical components or semiconductor manufacturing.

Specifications –

XY stage

LSMA-200

 Spec  Lift Stage

MLVT-70-13

 Spec  Rotary Stage

RTHM-151

 Spec 
Stroke (mm) 100 x 100 Lift (mm) 13 Rotation unlimited
Repeatability (µm) 1 Repeatability (µm) 2 Repeatability (arc-sec) 20
Resolution (µm) 0.3 Resolution (arc-sec) 1 Resolution (arc-sec) 0.5
Load capacity (kg) 6 Lift translation (mm/rev) 1 Torque (Nm) 0.5
Velocity (mm/sec) 20 (servo) Max velocity (mm/sec) 20 Angular velocity (rpm) 8
Mechanism, 

screw lead (mm)

lead-screw

0.5

Mechanism,

screw lead (mm)

direct drive screw

1

Mechanism,

ratio

worm gear

180:1

Motor stepper servo Motor stepper Motor stepper

servo

Options:

  • Steppers
  • Servos
  • Stroke lengths
  • Lift length
  • Complete Plug-and-Play system

Prints:

Intellidrives 4 Axis XYZ-Rotary System Drawings

FOR ADDITIONAL INFORMATION – CLICK HEREAbout IntelLiDrives —

IntelLiDrives, Inc. manufactures linear actuators, XY tables and rotary tables for the industry, government, science and research institutions around the world. Our precision rotary actuators, XY stages and linear actuators are used in the applications in medical devices, life sciences, semiconductor and electronic assembly manufacturing, data storage, laser processing, military/aerospace, photonics, automotive and test assembly, research and development and other industries requiring high precision and throughput motion control solutions.

For further information on this new product or others in our extensive product portfolio, call 1-215-728-6804 or e-mail Intellidrives at sales@intellidrives.com.com or go Intellidrive – Contact Us at: www.intellidrives.com/contact-us

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Motion Control Application- A wasp shows the way!

Maxon motion control application - Wasp Stinger

What do wasps have to do with brain surgery?  At first glance, not a whole lot. However, one species serves as the model for an innovative brain surgery needle that is being developed by a team of researchers from England.

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Maxon motion control application - Brain

Fall River, MA — Motion Control Components Application – In tumor treatment, neurosurgeons today use a thin, rigid needle to inject medication into the affected brain tissue. This carries a relatively high risk of injuring healthy tissue, because a rigid needle only allows the surgeon to enter a certain region of the brain, following a straight path. The ideal solution would be a flexible operating tool.

Maxon motion control application - Brain

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

This is where the London Imperial College comes in. In recent years, a team led by Prof. Rodriguez y Baena worked on developing a flexible robotic needle capable of reaching the deeper regions of the brain, while simultaneously avoiding especially sensitive areas. The young researchers sought to imitate the special mechanism employed by female wood wasps that use their thin but very strong drill-like stings to lay eggs inside the wood of trees.

Under the project name STING (Soft Tissue Intervention and Neurosurgical Guide), the scientists developed a prototype consisting of four segments with an overall diameter of 2.5 millimeters, held together by a puzzle-like interlocking mechanism. maxon drives provide the back-and-forth motion of the segments.

“The whole range”

Dr. Secoli is a member of the Mechatronics in Medicine Lab at the Imperial College. He selected the brushless maxon EC20 flat motor with a GP22 planetary gearhead for the application. An EPOS 24/2 positioning controller provides exact positioning. “Easy access to the API (Application Programming Interface) was the major key criterion of selection. On top of that, for fast-prototype system, maxon is the only manufacturer that offers the whole range of products: motor, gearhead, controller” says Dr. Secoli.

Maxon motion control application - Brain

Maxon motion control application - Brain

In early 2016, the team received a grant of 8.3 million euros from the European Union within the funding scheme Horizon2020. The new project codename EDEN2020 (Enhanced Delivery Ecosystem for Neurosurgery www.eden2020.eu), aims to set a new standard in the field of neurosurgical diagnostics and therapy by 2020.

For additional information on the components selected for this critically important project GO TO: https://www.maxonmotor.com/maxon/view/application/brain-surgery-needle-AB

Maxon motion control application - Brain

Comprehensive documentation and software are included with every delivery, and are also available for you to download from our website at www.maxonmotor.com.

Motion Control White Paper – Life Expectancy for Single Vs. Double Nut Ball Screws

Motion Control Components – White Paper – Life Expectancy for Single vs. Double Nuts by Steinmeyer!

Motion Control Components - Steinmeyer Single and Double Nuts

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Life expectancy equations provided by some manufacturers only cover nuts having two-point contact. But what about four-point nuts? And what about the effects of preload?

BURLINGTON, MA –Motion Control Components – The fundamental determining factor of life expectancy is duty cycle, which includes load, thrust, speed, and duration of the travel. Calculating these forces is commonly understood. But preload is a very important factor in ball screw life calculations and must always be considered.  In cases where the applied external load is low, preload can determine as much as 90% of the life.

Steinmeyer engineers have developed a preload graph that consists of two curves: each representing the force-deflection curve of one ball nut in a double nut configuration. It shows how deflections increase with greater force (and vice versa). It also displays how the forces in the opposite nut decrease as soon as deflection results in an axial displacement. For example, with double nuts, the higher the thrust carried by one nut, the more likely it will be the first to fail if not properly preloaded.

Motion Control Components - Steinmeyer Single and Double Nuts Chart

 

Since single nuts have four-point contact there are twice as many load/unload cycles for each given spot on the ball surface. The preload penalty of the four-point contact configuration is anywhere between a 50% life reduction (if the only force the nut sees is due to preload), and no reduction at all if there is zero preload. Real-world applications fall somewhere in between.

Lastly, if thrust is high enough to cause sufficient deflection, one set of balls in a double nut may run unloaded, which is generally unacceptable and potentially catastrophic. The preload must be high enough to ensure unloading will never occur. This isn’t the case for single nuts since there is no ball set to be unloaded, and exceeding the limits in the preload graph above is not a problem. Therefore, the life penalty depends on preload – life increases as preload is reduced

Does a Single Nut Have the Same Life Expectancy as a Double Nut?

Learn more about the nut designs from Steinmeyer Go to:

Nut Designs – https://drive.steinmeyer.com/technology/preload-and-rigidity/nut-designs/

Single Nut – https://drive.steinmeyer.com/technology/preload-and-rigidity/nut-designs/single-nut/

Double Nut – https://drive.steinmeyer.com/technology/preload-and-rigidity/nut-designs/double-nut/

Steinmeyer Technology Catalog – https://drive.steinmeyer.com/fileadmin/media/downloads/en/steinmeyer-catalog_technology_engl_2017.pdf (see pages 21 through 23)

Key Takeaways:

  • Differences between single and double nuts
  • Determining the life of a ball screw
  • Calculating impact of usage/application
  • Understanding the effects of preload

Contact Steinmeyer engineers to the see if which nut design is right for your application.

About Steinmeyer

Steinmeyer is the world’s longest continuously-operating manufacturer of commercial ball screws. In the realm of linear motion control, our company has become synonymous with precision, innovation, and exacting standards of quality.

Steinmeyer’s extensive product line is used widely in drive systems for industrial machines as well as precision positioning in optical instruments, medical devices, and other mechatronic applications. www.steinmeyer.com

For further information on Steinmeyer our extensive product portfolio, call 1-781-273-6220 or e-mail Rosmary Belt at rosmary.belt@steinmeyer.com or visit the Steinmeyer FMD group at: www.steinmeyer.com

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