'Environmentally sealed' linear actuator stands up to harsh world

Designers and engineers looking for compact linear actuators suitable in medical, food processing, cleanroom, and related applications now have an added solution with Ultra Motion LLC’s recent launch of a new series of such devices offering washdown and autoclaving capability.

07/22/2004



ESLA-17 actuator measures only 1.72 in. (44 mm) square at the motor end times 2.30 in. (58.4 mm) long. Overall dimension is just 5.8 in. more than the stroke length.

Designers and engineers looking for compact linear actuators suitable in medical, food processing, cleanroom, and related applications now have an added solution with Ultra Motion LLC ’s recent launch of a new series of such devices offering washdown and autoclaving capability. Available in 2, 4, or 8 in. stroke lengths, ESLA (Environmentally Sealed Linear Actuators) is powered by either a NEMA 17 or NEMA 23 size stepper motor. The device also is said to be quiet.

ESLA’s sealing provision consists of polyolefin shrink tubing and polyurethane adhesive at the motor end, while the polished stainless-steel shaft has a low-friction Buna-N U-cup seal. The actuator’s tube body is made of clear anodized aluminum (6061-T6).

These actuators feature a choice of lead-screw options. Three Acme-type screws (0.0833, 0.2500, and 0.400-in. pitch) and either single-nut or double-nut ball screws (0.1250-in. pitch) are available. The smallest pitch Acme lead screw cannot be back driven. Depending on the lead screw selected, the two actuator models—ESLA-17 and ESLA-23—have some common characteristics: Linear step resolution of 2,400 steps/in.; backlash of 0.0005 in.; and maximum speed of 16 in./s. ESLA-17 develops 97 lb max. force, while the larger ESLA-23 unit outputs 392 lb. max. force.

ESLA units come with matching controllers and drives for full-step, half-step, and microstepping operation. Externally adjustable reed switches provide home position sensing. Analog absolute position feedback is a further option, says Ultra Motion.

Frank J. Bartos, executive editor, Control Engineering, fbartos@reedbusiness.com





No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Motor specification guidelines; Understanding multivariable control; Improving a safety instrumented system; 2017 Engineers' Choice Award Winners
Selecting the best controller from several viewpoints; System integrator advice for the IIoT; TSN and real-time Ethernet; Questions to ask when selecting a VFD; Action items for an aging PLC/DCS
Robot advances in connectivity, collaboration, and programming; Advanced process control; Industrial wireless developments; Multiplatform system integration
Motion control advances and solutions can help with machine control, automated control on assembly lines, integration of robotics and automation, and machine safety.
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Big Data and bigger solutions; Tablet technologies; SCADA developments
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
click me