Four Reasons to Choose Linear Drives

Author: Trust Automation, Inc. July 26, 2017

Our latest white paper details the applications that favor linear drive technology.

Nowadays, engineers often default to digital drives when designing a motion control system. And while digital drives are the best choice in many stage and actuator applications, don’t forget about linear drives whenever you need to:

  • Reduce the influence of electrical noise.
  • Enhance precision and settling times.
  • Increase bandwidth.
  • Improve efficiency.

To learn more about the best applications for linear drives, download our latest white paper.

Introducing the New FTP High Force Electric Actuator

GILBERT, AZ.February 1, 2018 – Curtiss-Wright’s Sensors & Controls Division today announced the release of its newest Exlar® brand electric actuator, the FTP215. This high-force electric rod-style press actuator is designed exclusively for press applications as it offers forces up to 36 tf, making it an ideal replacement for hydraulic cylinders.

The Exlar FTP Series actuator allows machine builders to meet ever-increasing performance demands, while minimizing maintenance and downtime.  Based on planetary roller screw technology, the FTP Series offers very high force in a very small package. With continuous force ratings to 36 tf (metric), 40 tf (short), speeds to 351 mm/sec (13.8 in/sec), and stroke lengths from 150 mm (6 inches) to 600 mm (24 inches), the FTP Series can be applied across a wide range of pressing applications.

The FTP215 features include: 

  • High capacity planetary roller screws offering up to 15X the life and significantly higher shock load resistance than a comparably sized ball screw
  • IP65S (min.) environmental protection
  • Idler pulley design greatly simplifies motor installation and belt tensioning / maintenance
  • Rigid circular front mounting flange simplifies installation

For more information on Curtiss-Wright’s Exlar brand of actuators, please visit http://www.cw-sensorsandcontrols.com or www.exlar.com.

About Curtiss-Wright Corporation

Curtiss-Wright Corporation (NYSE:CW) is a global innovative company that delivers highly engineered, critical function products and services to the commercial, industrial, defense and energy markets. Building on the heritage of Glenn Curtiss and the Wright brothers, Curtiss-Wright has a long tradition of providing reliable solutions through trusted customer relationships. The company employs approximately 8,000 people worldwide. For more information, visit www.curtisswright.com

Accu Tech USA Announces New Sizes for PNCE Series Actuators

June 17, 2019

The PNCE electric cylinder actuators, developed by UniMotion, are now available in sizes 80 and 100. Designed to be a cost effective alternative to pneumatic systems, these new sizes provide more thrust and load capacity for use in a wider range of applications, including some smaller hydraulic systems.

The PNCE series of actuators combines a precision ball screw drive nested in a ISO 15522 package and features high accuracy and repeatability ball screws to ensure precise motion and positioning. With a full offering of ISO standard accessories, the unit can offer drop in replacement to many preexisting units. The PNCE is available with a handful of premium versions with upgraded sealing, materials and grease for IP65, Corrosion Resistance, and Food Grade applications.

PNCE Actuators

Features:

  • High accuracy and repeatability
  • High Leads
  • Custom Stroke Lengths
  • High Speed
  • Reduced Backlash (Preload available upon request)
  • Durable seals to protect cylinder from dust, water, and other contaminants
  • ISO sizes: 32, 40, 50, 63, 80, 100

Accessories:

  • ISO Standard Accessories (Rod End, Body, and Rear Mounting Attachments
  • Guiding Units
  • In-Line Motor Adapters
  • Reverse Parallel Motor Mounts
  • Couplings
  • Sensors

Accu Tech USA offers a variety of actuator types to meet your specific application including: Ball Screw, Belt Drive, Precision and Rod Style, Linear Motor, Rod Style Electric Cylinders and Medical Actuators. Designed to be rugged, durable, and easy to maintain, our complete product line features an affordable solution for any application. Available in a wide range of stroke lengths, speeds, and customizable options, our expert team of engineers can help you determine the best solution for your application.

For more information about the PNCE Series of products or other automation solutions, please contact sales@accu-techusa.com

Introducing the New GTX Integrated Motor / Actuator

GILBERT, AZ.February 15, 2018 – Curtiss-Wright’s Sensors & Controls Division today announced the release of the highly anticipated Exlar® GTX080 next-generation integrated motor/actuator. The GTX080’s latest design offers substantial performance improvements over its predecessor. Incorporating Curtiss-Wright’s patented inverted roller screw technology, the GTX080’s high power density and compact form factor make it an ideal replacement for hydraulic cylinders.

The GTX Series actuators offer the power, precision, and programmability of a servo system while minimizing the maintenance headaches and mess of hydraulics.  With continuous force ratings up to 5680 N (1277 lbf), speeds up to 4200 rpm, and stroke lengths from 100 mm (4 inches) to 450 mm (18 inches), the GTX080 can be applied across a wide range of factory automation applications.

The GTX Series features include: 

  • High capacity planetary roller screws offering up to 15X the life and significantly higher shock load resistance than a comparably sized ball screw
  • IP65S (min.) environmental protection
  • Seamless integration into most leading motion control architectures
  • Removable front seal bushing greatly simplifies maintenance and re-greasing of nut assembly to maximize actuator life
  • Modular design with bolt-on mounting hardware allows mounting style reconfiguration or replacement in the field using commonly available tools
  • Smoother, quieter operation compared to previous generation designs

For more information on Curtiss-Wright Sensors & Controls, please visit http://www.cw-sensorsandcontrols.com or https://exlar.com/.
About Curtiss-Wright Corporation

Curtiss-Wright Corporation (NYSE:CW) is a global innovative company that delivers highly engineered, critical function products and services to the commercial, industrial, defense and energy markets. Building on the heritage of Glenn Curtiss and the Wright brothers, Curtiss-Wright has a long tradition of providing reliable solutions through trusted customer relationships. The company employs approximately 8,600 people worldwide. For more information, visit www.curtisswright.com.

Introducing our Newest Fully Integrated Drive/Motor/Actuator, the TTX Series

GILBERT, AZ. – February 15, 2018 – Curtiss-Wright’s Sensors & Controls Division today announced the release of the Exlar® TTX080, our newly designed fully integrated drive/motor/actuator. Utilizing the all-new GTX Series base actuator as a foundation, the TTX080 adds the control and drive electronics necessary to allow stand-alone operation, making it an ideal retrofit for hydraulic cylinders on existing machinery.

The TTX Series actuators offer the power, precision, and programmability of a servo system while minimizing the maintenance headaches and mess of hydraulics. With continuous force ratings up to 11.9 kN (2,687 lbf), speeds up to 953 mm/sec (37.5 in/sec), and stroke lengths from 100 mm (4 inches) to 450 mm (18 inches), the TTX080 can be applied across a wide range of factory automation applications.

The TTX Series features include:

• Servo control, drive, and motor integrated with a compact, power-dense actuator
• High capacity planetary roller screws offering up to 15X the life and significantly higher shock load resistance than a comparably sized ball screw
• IP65S (min.) environmental protection
• Removable front seal bushing greatly simplifies maintenance and re-greasing of nut assembly to maximize actuator life
• Modular design with bolt-on mounting hardware allows mounting style reconfiguration or replacement in the field using commonly available tools
• Smoother, quieter operation compared to previous generation designs

For more information on Curtiss-Wright Sensors & Controls, please visit
http://www.cw-sensorsandcontrols.com or https://exlar.com/.

About Curtiss-Wright Corporation
Curtiss-Wright Corporation (NYSE:CW) is a global innovative company that delivers highly engineered, critical function products and services to the commercial, industrial, defense and energy markets. Building on the heritage of Glenn Curtiss and the Wright brothers, Curtiss-Wright has a long tradition of providing reliable solutions through trusted customer relationships. The company employs approximately 8,600 people worldwide. For more information, visit
www.curtisswright.com.

Actuator De-rating for Elevated Ambient Temperatures

It is important to consider the environment temperature when sizing your actuator if it is hotter than standard room temperature (25°C or 77°F). A motor (or integrated linear actuator) has two ratings – continuous force and peak force. The continuous force rating is the force at which the actuator could push 100% of the time without its motor overheating. The peak force is the absolute max force either the stator can produce or the screw can handle (whichever limits first). If your temperature is hotter than 25°C however, the actuator would overheat faster – meaning it would need to be limited to less force in order to run 100% of the time without its motor overheating. So how do we determine the new force rating if the environment is really hot? With this equation:

The answer is in terms of a percentage of the catalog rated continuous force.

Example:

Let’s say your environment is at 150°F and you’re using a GSX50-1010, 2-stack. The actuator has a continuous force rating of 1005 lbf, meaning at room temperature it could push 1005 lbf continuously without overheating. But you’re not operating at room temperature. You’re operating at 150°F.So first, let’s convert to Celsius:

150°F = 65.56°C

Then let’s plug it into the equation:

This means you’re now limited to 78.3% of the original 1005 lbf rating. So 78.3% of 1005 lbf is 787 lbf. Your drive must now be programmed to limit to the current that is equivalent to this force if it were to be run continuously.

*You could still run at more current/force than this for a percentage of the time, just not 100%. For help calculating your allowed percentage based on run time, see our Duty Cycle Tech Tip of the Month or check out our frequently asked questions section of our website.

**Remember, this applies to actuators with motors in them, not stand-alone actuators. The calculation above still needs to be run for the motors controlling these actuators, and those motors still need to be limited if necessary, but the stand-alone (universal) actuators ratings are their rating regardless of temperature. i.e.: An FTX095 could push 5000 lbf at 25° C or 85° C as long as the motor could handle it.

How to lengthen the life of your actuator

Because roller screws have numerous contact points versus ball screws, the life of the actuators lengthen substantially. However, many things will affect the length of life for a roller screw. Here are some tips to increase roller screw life:

  • Eliminate/mitigate side load/misalignment
  • Reduce (or ideally, eliminate) hard impacts/shock loads
  • No end crashing or hard stops. Bumpers are there for accidents only (use nice and controlled deceleration)
  • Switch up the portion of the screw being used for press applications (evenly distribute the wear)
  • Make sure wear parts are replaced as necessary (Front seal bushings and other seals/o-rings etc)