Motion Control – Steinmeyer Tutorial Series – Ball Screws – Explaining Load Capacity!

Motion Control – Ball Screw Tutorial

Motion Control Ball Screw Tutorial

 

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Tutorial presented by Steinmeyer – Many engineers are confused about this topic, especially if they don’t work frequently with ball screws. So let’s take a moment to explain the terminology.

 

BURLINGTON, MA — There are generally two load capacities given for a particular ball screw: Dynamic and Static.

Dynamic Load Capacity

The dynamic load capacity (DLC) is simply a load rating. It’s the load for a (theoretical) life of 1 million revolutions (ISO/JIS standard) or for 1 million inches of travel (ANSI standard). The DLC is critical for making lifetime calculations, since the expected life goes as the cube of the ratio of DLC to actual load. So, if the load is only 10% of DLC, then the expected life is 1 billion revolutions.

But that still doesn’t mean you could run the screw with this kind of load and expect a to achieve that life! Why? The normal maximum operating load of a general use ball screw is about 30% of the DLC. (Above that, the elastic deformation of the balls and races is too large, which may cause excessive wear.) So, if you run a ball screw with a load equal to its DLC, you may not get as much life as you expect.

Static Load Capacity

The static load capacity (SLC) indicates the load above which the screw may be damaged. Staying below SLC ensures that balls and races don’t suffer brinelling (or plastic deformation). This is critical! But bear in mind that a ball screw may be damaged in other ways with loading below the SLC: you could easily tear off the flange of the nut, snap the bearing or drive journal of the screw, or even collapse it from exceeding the buckling load.

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 mechatronic applications.

Contact Steinmeyer for further information on their extensive product portfolio:

781-273-6220

infoUSA@steinmeyer.com

Visit Steinmeyer.com

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Motion Control Application – Twenty-twenty Vision – Maxon Components Allow Surgeon to Not only See But to Feel!

Motion Control – Application

While robotic assistance systems are available for most types of surgery today, eye surgery used to be an exception. A Dutch company has changed that. A world first in eye surgery.

 

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motion control component used in eye surgery

© 2016 Preceyes

Fall River, MA — Motion Control Components Application – Worldwide, about 50 to 70 million people are suffering from visual impairment due to disorders of the retina. Adequate treatment is still impossible in many cases. Eye operations are always a big challenge for a surgeon, and steady hands are a key requirement. Surgeries like those for treating a detached retina require extreme precision. And when it comes to precision, human hands can’t hold a candle to robotic systems.

Ten to twenty times better precision

This is why the company Preceyes, which originated as a spin-out from the University of Eindhoven (Netherlands), has developed a completely new robotic system for eye surgery. Specially designed for the treatment of retina disorders, the assistance system improves precision by a factor of 10 to 20 compared with the human hand. This allows operations to be performed that are currently impossible due to lack of precision – an enormous gain for patients, but also for surgeons, whose effectiveness and accuracy will be vastly improved

motion control haptic robotic component

The new robotic system is used in surgery to treat disorders of the retina. Image © Preceyes

The world’s first robot-assisted operation inside the eye was performed successfully at the John Radcliffe Hospital, Oxford. “This is the culmination of 10 years of work. The ease with which Professor MacLaren was able to perform the surgery is an important step ahead for robot-assisted eye operations and a clear vindication of our technology,” says Marc de Smet, MD Chief Medical Officer at Preceyes.

Haptic feedback

The functional principle is straightforward: While the operating surgeon is sitting next to the patient’s head looking through a microscope, he is operating a joystick whose motion is transmitted to a robotic arm (slave). The robot downscales the motion: When the surgeon moves the joystick by a centimeter, the tip of the robotic arm moves only by a millimeter. Meanwhile, the other hand performs manual tasks as required. The system is designed to allow surgeries to be performed with motion control alone as well, using two joysticks and two robotic arms..

In addition to a haptic feedback function that not only lets the surgeon see but also feel his actions, the robotic system also supports quick retooling. This is an important factor because it reduces the time required for an operation. The motions of the robotic arms are performed by high-precision drive systems of maxon.

Contact maxon for more details info@maxonmotorusa.com

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

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Motion Control ServoStep Integrated Stepper Motor in size NEMA 17, torque up to 0.8 Nm!

Motion Control Integrated Step Motors

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Vaughan, Ontario, Canada — Motion Control Components — JVL Industri Elektronik A/S, one of the world leaders in the field of integrated servo – and stepper motors introduces a new compact and slim stepper motor. The new ServoStep integrated stepper motor series MIS171 to MIS176 have a NEMA 17 42×42 mm flange and include controller with 6 different industrial Ethernet protocols, absolute multiturn encoder, closed loop and M12 connectors. This new motor family is based on the latest microprocessor and cooling technology and an advancement compared to previous designs.

All the necessary electronics in a stepper system are integrated in the motor itself and are similar to the concept used by other JVL motors, making it very easy to use in all kind of motion control stepper or servomotor applications. The motor contains everything needed to solve a modern control task, either as a stand-alone with own easy programmable motion controller or controlled from an external PLC or PC. 8 I/O points can be individually configured as digital input, digital output or analogue input. Modbus RTU or CANopen provide easy connections to a PLC or HMI. An ActiveX/OCX driver is available to make simple interface to LabView, Excel, VB or other Windows-programs. Up to 254 axis can be connected on the same RS485 bus.

Key features:
  • Industrial Ethernet. 6 Protocols 
  • Very high motor power and torque
  • Closed-loop operation with current control 
  • Absolute multiturn encoder
  • Safe Torque Off (STO) input
  • High resolution 409600 cnt/rev.
  • Speed 0-3000 in 0.01RPM steps
  • Wide supply range 7-72 VDC
  • Protection class up to IP67
  • M12 or M23 connectors
Motion Control Industrial Ethernet: 

Profinet, EtherCAT, Powerlink, EtherNet/IP, Modbus TCP or SERCOS III are available and for EtherCAT and SERCOS III synchronization and drive profiles are available. MACtalk can use Ethernet for commissioning the motor so no need for RS232/RS485 converter or additional cables. The motor has the ability to be upgraded with other protocols or newer versions of the same protocol at any time Because of the upgradeability, the JVL Industrial Ethernet module is also ‘future proof' as newer versions of the protocols will always fit into the design. The motor is equipped with two Ethernet connectors and a built-in switch, enabling line topology without any extra expensive hardware. Several LEDs, enabling technicians and operators to get a quick status overview.

Motion Control Motor range:
  • MIS171 with 0,15 Nm, length 70,5 mm. 5mm shaft 
  • MIS173 with 0,26 Nm, length 83,5 mm. 5 or 6,35mm shaft
  • MIS176 with 0,80 Nm, length 104,3 mm. 8 mm shaft

The motors can be operated as stand-alone units or controlled from a PLC or PC. The 8 I/Os can be individually configured as digital input, digital output or analog input. As standard, it is possible to communicate with holistic systems via for example Modbus RTU or CANopen. The MAC motor standard protocol that is also supported makes it possible to connect up to 254 other JVL integrated motors. The MIS17 series allows connectivity to all industrial Ethernet interfaces such as Profinet, EtherCAT, Powerlink, EtherNet/IP, Modbus TCP and SERCOS III.

Motion Control Interface: 
  • Industrial Ethernets Profinet, EtherCAT, Powerlink, EtherNet/IP, Modbus TCP and SERCOS III
  • CANopen DSP402 and DS301
  • Pulse/Direction mode for electronic gear
  • High speed position capture
  • ActiveX/OCX driver as well as JVL MacTalk Protocol
  • Strong graphic programming with + – * / calculations and advanced features
  • SSI interface for external linear or rotary absolute encoders
  • External encoder for dual closed-loop. 
  • RS485 up to 921 kbit and Modbus RTU
  • RS422 and RS485 for encoder I/O and connection to external HMI, PLC or encoder
  • Point-to-point or multi-axis operation with up to 254 JVL motors on the same RS485 bus
  • Wireless Industrial Ethernet through Bluetooth or WLAN
Motion Control Motor specification: 
  • Built-in PLC with 8 DIO, 24V or 0-5V (12bit) analog input with advanced filtering
  • Speed-precision 0.01 RPM. Acceleration-precision 1 RPM / sec.
  • Absolute multi-turn encoder
  • Built-in encoder for closed loop and stall detection and control 
  • Wide supply range of 7-72 VDC provides high torque at high speeds
  • Dual supply maintain position values etc. in emergency situations
  • Motor current 0-4 Amp RMS and 5,6 Amp peak
  • Closed-Loop operation
  • Double shaft and brake option
  • All connections with M12 connectors in IP67
  • Top or rear-end mounted M12 or M23 hybrid connector

For further information on the JVL ServoStep Series Motors, call 1-877-SERVO99 (737-8699) or e-mail Warren Osak at sales@electromate.com or visit Electromate at: www.electromate.com

About Electromate:

Electromate’s Core Purpose is to help Manufacturers build better machines using differentiated automation technology. They specialize in Robotic and Mechatronic Solutions for the Industrial Automation marketplace. Respected by customers as a premiere source for High Performance Automation and Motion Control Components & Systems, Electromate® specializes in AC & DC Servo and Stepper Motors & Drives, Motion & Automation Controllers, Positioning Systems & Actuators, Feedback Devices, Gearing Products and HMI’s & Operator Displays, all supported via extensive product selection, just-in-timedelivery, dedicated customer service and technical engineering support.

More on Electromate can be found at

Website: http://www.electromate.com

LinkedIn: https://www.linkedin.com/company-beta/209277/

Twitter: https://twitter.com/Electromate

Facebook: https://www.facebook.com/electromateindustrial/

Google+: https://plus.google.com/104057418684128701566

Blog: https://electromate.wordpress.com/

Electromate Best Blace to Work

For more information on the “Best Place to Work”CLICK HERE!

To view Electromate’s new corporate video CLICK HERE

To see all of Electromate’s Products and Application Stories featured on MotionShop.com, enter electromate in the Google custom search box (upper left, above)

For further information on this new product or others in our extensive product portfolio, call 1-877-SERVO99 (737-8699) or e-mail Warren Osak at sales@electromate.com or visit Electromate at: www.electromate.com

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Motion Control – Redundant Coil Voice Coil Motor Available from H2W Technologies, Inc!

Motion Control Redundant Voice Coil Motor from H2W Technologies!
motion control redundant voice coil motor

 

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Santa Clarita, CA —–

When three-phase AC power is applied to the primary, a travelling electromagnetic flux wave is induced and moves relative to the primary. The wave induces an electric current in the conductive reaction plate. The induced electric current interacts with the magnetic flux to produce a linear force. The speed of the motor can be varied by changing the input frequency using an adjustable frequency drive.

Each coil pair operates as its own voice coil.

Redundancy is a requirement on many flight systems in a special case when one coil faults, the other can be used to make the motor “fault-resistant”.

Other systems require simplified circuitry which would not allow the change of current polarity in order to change the direction, in these cases each coil can be used to drive the coil in a single direction. The challenge in manufacturing a redundant coil is ensuring the same performance no matter the coil, which requires precise manipulation of the magnetic circuit design, and the precise coil layout to ensure the identical operation and constants for each coil. This will allow the controls to seamlessly switch between the two coils.

There are two ways of accomplishing this coil redundancy. The most common way would be to generate multiple coils operating on individual magnetic circuits. This requires a longer coil and multiple magnetic circuits; however this is the most robust design and the least vulnerable to damage or interference from the redundant coil. The NCC08-18-025-2R2C is an example of the multiple coil design. An alternate method, which allows for the most compact solution, would be a multi-filar wind. This method only requires one magnetic circuit, which is why the length is shorter. In this case multiple coils are wound in the same winding space.

About H2W Technologies, Inc.

H2W Technologies, Inc. is dedicated to the design and manufacture of linear and rotary motion products that are used in the motion control industry. The complete line of linear electric motors includes: Single and dual axis linear steppers, DC brush and brushless linear motors, voice coil actuators, and AC induction motors. Also offered is a complete line of ball screw, lead screw and belt driven positioning stages.

Other motion control products include: Limited angle torque motors for compact, limited angular excursion rotary servo applications, 3 phase brushless rotary servo motors with matching digital servo amplifiers and permanent magnet linear brakes for fail-safe, zero power braking for baggage handling and people moving applications as well as amusement park rides.

With over 75 years combined experience in the linear and rotary motion field, the H2W Technologies team of engineers offers the optimal solution to the most demanding motion control, requirements.

 

See Product: https://www.h2wtech.com/product/voice-coil-actuators/NCC08-18-025-1R2C”

For additional information contact Mark Wilson at H2W Technologies, 26380 Ferry Ct, Santa Clarita, CA 91350; Tel: 888-702-0540, Fax: 661-251-2067, E-Mail: info@h2wtech.com or visit the website at http://www.h2wtech.com


For other Motion Control Components, Applications, and Technology from H2W Technologies, Inc. go to: http://MotionControlWeb.com
 

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Motion Control Digital Servo Amplifiers for Embedded Applications!

Motion Control – Digital Servo Amplifiers

motion control digital servo amplifier

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Motion Control Components – Servo2Go.com announces the release of the DZRALTE Series of High Performance Digital Servo Drives from Advanced Motion Controls of Camarillo, CA, which are engineered to conquer the most demanding industrial applications!

The DZRALTE Series are motion control digital servo drives that control brushed & brushless servomotors in a compact form factor which make them ideal for embedded applications. These fully digital drives operate in torque, velocity, or position mode and employ Space Vector Modulation (SVM) which results in higher bus voltage utilization and reduced heat dissipation compared to traditional PWM drives. The command source can be generated internally or can be supplied externally. In addition to motor control, these drives feature dedicated and programmable digital and analog inputs and outputs to enhance interfacing with external controllers and devices.

The DZRALTE Series feature a RS-232 interface for drive configuration and setup as well as a RS-485 interface for drive networking. All drive and motor parameters are stored in non-volatile memory. Drive commissioning is accomplished using AMC’s powerful & user friendly free DriveWare software.

The combination of a DigiFlex® Performance™ DZRALTE servo drive with its DriveWare software establishes a new benchmark in versatility!

Motion Control Capabilities built into the DZRALTE servo drives include:

  • Size Ranges: 10-175 VDC @ 6A to 30A continuous (60A peak) Output
  • Full tuning control of all three servo loops: Position, Velocity and Torque!
  • Real-time oscilloscope with up to 8 channels to ensure that tuning achieves the highest performance
  • Status window with over 50 simultaneous channels for drive and system diagnostics
  • I/O configuration configurable to latch/non-latch as well as active-high & active-low
  • Universal servo motor compatibility by means of automatic commutation adjustment
  • Dual Loop Feedback – Increases both stability and accuracy

Additional information on the DZRALTE Series Servo Amplifiers can be found at: https://www.servo2go.com/catalogsearch/result/?q=DZRALTE

These and other Motion Control Products are available through www.Servo2Go.com

For further information on this new product or others in our extensive product portfolio, call 1- 877-378-0240 or e-mail Warren Osak atwarren@servo2go.com or visit Servo2Go.com at: www.Servo2Go.com

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Motion Control – Optimal Engineering Systems, Inc. (OES) Introduces New, Motorized, High Resolution Pan-Tilt Stages!

Motion Control – Pan-Tilt Stage
motion control pan tilt stage

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Van Nuys, CA – — Motion Control – High Resolution, Motorized, Pan-Tilt Stages have been added to the extensive line of OES (Optimal Engineering Systems, Inc.) motion control products. These motorized Pan-Tilt Stages are available in two sizes. The PT60-1 Pan-Tilt Stage is a combination of two 60 mm (2.362 in.) rotary stages and the PT100-1 is a combination of two 100 mm (3.937 in.) rotary stages, set at a 90O angle to each other. The rotary stages of each Pan-Tilt stage features a high repeatability of 0.005O (18 arc-sec), a positional accuracy of 0.005O (18 arc-sec), and a resolution of 0.001O = 3.6” (10 Micro-steps per Step Motor Driver in use). These Pan (horizontal table)-Tilt (vertical table) Stages are deal for: Scanning, testing, inspection, assembly, positioning, laser and micro machining, pointing optics and cameras, and other applications.

The pan and tilt axes on both stages have precision V-grove and crossed roller travel guides and are driven by a worm gear with just of 0.005O (18 arc-sec) of backlash. These compact, easily integrated Pan-Tilt stages weigh just 2.0 kg (4.4 lbs) for the PT60-1 and 4.4 kg (9.75 lbs) for the PT100-1 and load capacities are 10 kg (22 lbs) and 20 kg (44 lbs) respectively).

Each axis is driven by a standard bi-directional stepper motor with a knob for manual adjustments and each rotary axis has a vernier scale for setup. The knob on each motor can be replaced with an optional encoder for position verification. Travel speed of each axis is 12O per second with a stepper motor or for higher speeds and closed loop operation, servo motors are available. Electrical connections are made using 9 pin DB-9 connectors.

The PT60-1 and the PT100-1 Pan-Tilt Stages can be ordered as complete plug-and-play systems with a multi-axis controller, joystick, trackball or keypad.

About OES – Optimal Engineering Systems, Inc. (OES) is a manufacturer of motion control products including: Stepper motor controllers and drivers, solenoid electronics, and positioning stages and slides. Applications include: Animation, automated assembly systems, automation, CNC machines, flight simulation, inspection systems, linear and rotary stages, machine tools, medical devices, motion control camera boom systems, optical comparators, CMMs, pan-tilt gimbals, PCB assembly & inspection, pick-and-place, positioning stages, robotics, scanners, security cameras, telescope drive mechanisms, time-lapse photography and winders.

Some of the industries OES serves are: Aerospace, Astronomy, Chemical, Communications, Educational Institutes, University, Colleges, Government Agencies, National Labs, Manufacturing, Medical, Metrology, Military, Motion Control, Museum, News Agencies, Semiconductor and Test Equipment. Optimal Engineering Systems, Inc’s. competitive advantage is its state-of-the-art in-house manufacturing facility in North America enabling OES to supply clients with custom designed orders or high volume just-in-time deliveries globally.

For additional information, contact sales team at: OES, 6901 Woodley Ave.; Van Nuys, CA 91406; Telephone: 888-777-1826 or +1 818-222-9200, FAX +1 818-436-0446 or E-Mail: sales@oesincorp.com or visit the website at http://www.oesincorp.com


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