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DOING THINGS DIFFERENTLY
Enfield Technologies exemplifies leadership in engineering. They truly practice “mechatronics” where
physics and control theory underpin the design process, and then the mechanical, electronic, and firmware
elements of the system are designed in concert. This is quite different than the typical approach of
starting with a mechanical design and then trying to adapt electronics and control algorithms. Product
development and application engineering projects often start with a total system modeling in Matlab/
Simulink or Labview to determine how best to optimize the system. The results are exceptional.
Enfield Technologies delivers products that lead the industry, turning ideas into solutions.
NEW FOR 2012 – A BREAKTHROUGH IN PNEUMATIC POSITION CONTROL
Enfield Technologies has introduced the S2 Servo Pneumatic Proportional Control System for
variable positioning of air cylinders.
The compelling aspect of the S2 is tight integration of control algorithms, electronics and mechanical
components in one package. Focused on simplifying setup and attaining superior performance, Enfield
designed the S2 as a directional control valve with an on-board closed-loop controller, high efficiency
valve driver, and sensors to measure differential pressure in the cylinder. Inputs are simply power,
cylinder position set-point signal, and cylinder position sensor feedback signal.
Enfield has provided the end user with ultimate flexibility in their design process. Instead of being locked into
one brand, the S2 can be paired with any air cylinder brand and standard analog position sensors. This allows
the customer to deploy best-of-breed components for their application. Designers can tackle high speed and
high force applications with less cost and less space than electric drives for the same load capacity.
The innovative algorithm uses a cascaded control system with both position and
pressure feedback. The result rivals electric drives while retaining the advantages of
pneumatics for moving and holding high loads, space efficiency, and low cost.
Their website shows a video of an application using 40 mm (1.5”) bore
cylinder following a PLC command to move 25 kg (55 lb) to various
positions at 1200 mm/s (50 in/s) with positional accuracy of 0.5%.
Customers have also used the system for even more precise control.
For example, a laboratory automation process was developed to
provide 5 mm indexing with better than 0.25 mm accuracy for a
tray of small samples moved by a 300 mm low friction guided
cylinder with feedback. That’s better than 0.1% accuracy. |
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Enfield Technologies is an expert in high performance
proportional control systems. Their standard product
line focuses on proportional and servo pneumatics.
The innovations in pneumatic control that Enfield
Technologies has brought to market allow their customers
to create unique, market leading products and systems.
Their control valves, regulators and electronics solve
many of the challenges posed by compressible fluids.
Simply put, they make pneumatics do things that
others declare impossible.
Enfield Technologies’ products are used in automation,
life sciences, medical equipment, test & measurement
instrumentation, and process controls. Typical
applications include intermediate positioning and motion
control, force control, mass and volumetric flow
regulation, pressure and vacuum regulation, and highspeed
gas source switching and gas mixing operations.
With custom products and engineering services,
Enfield Technologies also applies its expertise to
control electronics and components for specialty
pneumatics, fluidics, hydraulics, electro-mechanical
drives, and system level controls.
enfieldtech.com
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