salesinfo@dynamic-structures.com | 615-595-6665
Dynamic Structures and Materials, LLC (DSM) specializes in the development and application of micropositioning and nanopositioning devices.  DSM manufactures and sells direct: Piezo Actuators, Piezo Stages, Piezo Electronics, Piezo Amplifiers, Piezo Controllers, Piezo Motors, Piezo Stacks, micro-positioning, PZT, Piezo Positioner, Piezo Stage, Piezo Actuator, Piezo Motor">
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DSM Model I-90 Piezo Motor 

Total macro stroke:  25 mm (0.98 in). Actual value is determined by motor design.  Designs can be configured for increased travel.

Motion resolution:  Sub-micron step capability- using micro stepping driver.

Dimensions: Approximately 63 mm x 57 mm x 18mm (2.5in x 2.3in x 0.7in) depending on force specification.

Motor speed: Up to 30 mm/sec depending upon the motor architecture and driving frequency.

Output force: 90 N (20.2 lb)


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DSM Model CS-12-60 Piezo Motor Specifications

Total macro stroke:  Typically 3 to 25 mm.  Actual value is determined by motor design.  Designs can be configured for increased travel.

Motion resolution:  Sub-micron step capability- using micro stepping driver.

Dimensions: Approximately 17 mm x 29 mm x 30 mm (0.67 in x 1.14 in x 1.18 in) depending on force specification.

Motor speed: Up to 30 mm/sec depending upon the motor architecture and driving frequency.

Output force: Force levels for current models range between 20 N to 100 N (5 to 22 

lbf) depending on motor frame size and piezoelectric size.  The motor can be configured for power-off slip or power-off hold. 


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DSM Model I-30 Piezo Motor Specifications

Total macro stroke:  10 mm (0.4 in). Actual value is determined by motor design.  Designs can be configured for increased travel.

Motion resolution:  Sub-micron step capability- using micro stepping driver.

Dimensions: Approximately 24 mm x 14 mm x 48 mm (0.95 in x 0.55 in x 1.89 in) depending on force specification.

Motor speed:  Up to 30 mm/sec depending upon the motor architecture and driving frequency.

Output force:  30 N (6.7 lb). The motor can be configured for power-off slip or power-off hold. 


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DSM Model PS3-UL Piezo Motor Specifications

Total macro stroke:  3 mm (0.12 in). Actual value is determined by motor design.  Designs can be configured for increased travel.

Motion resolution:  Sub-micron step capability- using micro stepping driver.

Dimensions: Approximately 44 mm x 29 mm x 15mm (1.7 in x 1.1 in x 0.6 in) depending on force specification.

Motor speed:  Up to 80 mm/sec depending upon the motor architecture and driving frequency.

Output force:  50 N (11 lb). The motor can be configured for power-off slip or power-off hold. 


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DSM Model SQ-150 Piezo Motor Specifications

Total macro stroke:  5 mm (0.2 in). Actual value is determined by motor design.  Designs can be configured for increased travel.

Motion resolution:  Sub-micron step capability- using micro stepping driver.

Dimensions: Approximately 36 mm x 36 mm x 71 mm (1.4in x 1.4 in x 2.8 in) depending on force specification.

Motor speed:  Up to 150 mm/sec depending upon the motor architecture and driving frequency.

Output force:  151 N (34 lb). The motor can be configured for power-off slip or power-off hold. 


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Semiconductor Process and Metrology

A manufacturer of metrology/inspection tooling needed a compact, stiff stage for the precision positioning of semiconductor wafers in a light vacuum environment. DSM's ZSA-1000 was designed to provide +/- 500 microns of displacement in a stage height of one inch. Flexure-based, parallel arms provide a wide stance for motion stability that eliminates the need for additional guiding rails. The stage also features an optional 28 mm diameter through-hole for tooling or optical access. DSM developed an OEM design version of a linear piezo amplifier to provide servo control of the stage's motion.

A closed-loop revision of the 1 mm Z-stage incorporated a capacitive probe and was controlled with 20 nm position stability using DSM's SA-100 servo amplifier. The stage was used by a customer in the semiconductor industry to provide scans with very stable velocities throughout the stage's 1 mm displacement range.


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3-axis Stage for Vacuum

When one of DSM's customers required a custom three-axis positioning system, DSM leveraged the flexure-based design of its flextensional piezo actuators to create independent X, Y, and Z stages. The resulting X and Y stages each provide 200 microns of travel, and the Z axis has a stroke of 500 microns. The original stage assembly was designed for vacuum compatibility and was provided with benchtop models of DSM's VF linear piezo amplifier. The basic design of the stage systems is scalable to smaller/larger displacement capabilities.

As a follow-on deliverable to the original, open-loop XYZ system above, DSM's customer requested closed-loop capability for the X and Y axes. DSM incorporated capacitive probes and used SA-100 linear servo amplifiers to provide stand-alone servo control. A 24-bit analog input accepts the position target signal, and digital I/O provides flags for "in-range" and data acquisition triggers.


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Piezoelectric Rotary Stage

Dynamic Structures and Materials offers custom design capabilities for rotary and linear piezo stages required for unique positioning applications and environments. DSM's flexure mechanism designs are used in micropositioning and nanopositioning applications where backlash- and stiction-free performance are critical.

A representative example of a custom, multi-axis design required a +/-0.25 degree rotational stage mounted to two manually-adjustable flexure stages for 0.5mm linear travel and +/- 2 degree rotation (not shown). The rotary stage was designed for closed-loop operation using an eddy current proximity displacement sensor and DSM's SA servo amplifier. The total footprint of the assembly is approximately 25 x 60 mm.

In the actual closed-loop application, this stage achieved the desired move and settle operation for 10% of the full scale rotation within 10 msec.


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3 and 4 Point Precision Bend Test System

The "Nanopress" was originally developed for explorative research in the field of mechanical break junction circuits. A subsequent application required the incorporation of a high-resolution load cell for the characterization of thin films under stressed condition. The Nanopress system's design includes a coarse adjustment capability for 1.5 mm travel and a piezo actuator for a servo-controlled nanopositioning range of 30 microns. A capacitive probe provides the nanometer-level displacement feedback signal that is fed into DSM's SA piezo servo amplifier and used to establish the system's servo control. The system is scalable and can be used for stress testing of small material samples as well as for mechanical break junction testing. Replaceable "jaws" convert the Nanopress from a 3- to a 4-point bend test device.


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3-Axis Optical Flexure Mount

Dynamic Structures and Materials offers custom design capabilities for rotary and linear flexure-guided stages required for unique positioning applications and environments. DSM's flexure mechanism designs are used in unique positioning applications where backlash- and stiction-free performance are critical.

The 3-axis rotary flexure mount pictured here is a representative example of DSM's design capabilities for flexure-guided stage design. A custom, multi-axis design required three axes of flexure-guided motion for a 4 kg payload. The design requirements included +/- 2 mm of linear travel adjustment in one axis and +/-2° of rotational adjustment in two additional axes. The assembly's design minimizes undesirable motion during temperature transients and shock loading.

DSM designed the flexure mount using a titanium and aluminum construction. Fine thread screw adjusters provide manual adjustment capability. Pre-load springs and flexure pivots provide return force.


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Air Bearing Motion Platforms

Dynamic Structures and Materials offers custom air bearing stage design and integration for a wide array of rotary and linear applications. DSM is experienced at both stage design and integration of air bearings with drive components to meet the most demanding levels of precision.

Air bearings are an excellent solution for applications requiring high levels of precision and performance. Air bearings exhibit frictionless motion and high resolution position control. They do not suffer from wear, have high stiffness, can achieve high speeds and have better damping characteristics than rolling element bearings. Their form of motion is very accurate with low synchronous and asynchronous error.


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Miniature Pipe Crawler

When engineers at NASA's Marshall Space Flight Center wanted to explore various means for creating a device that could crawl through the coolant lines of the Space Shuttle's main engine (SSME), they called on Dynamic Structures and Materials (DSM). DSM offers custom design capabilities for precision motion control platforms required for unique positioning applications and environments.

The miniature tube crawling device was developed in response to NASA's request for the development of miniature inspection technologies. This particular crawler is intended to enable imaging of a small (less than one inch) pipe for long distances (greater than ten feet) with greater than 90º turns having radii > 4". To provide the ability for introducing inspection equipment into the tube, the tube crawling device needed to be capable of pulling a 5 lbf. load through the pipe at a rate of 2-5 mm/sec.

DSM designed the crawler around a miniature DC brushless motor and a unique locomotion technique. This technique utilizes wheels traveling in a helical motion to advance the crawler down the tube. Solid-state flexures provide a spring preload for the stator's contact wheels and rotor hub's wheels. The rotor hub is designed with a slight lead angle to generate a helical motion that propels the crawler forward and backward.


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Boeing shaker system for the International Space Station

DSM was contracted by the Boeing Corporation to develop a complete proof-mass shaker system. The system consisted of a low profile, high force shaker, an arbitrary waveform generator, and an efficient amplifier for use in testing the limits of the current active and passive vibration suppression systems aboard the International Space Station (ISS). The technology within the shaker was developed through a BMDO-funded SBIR program for piezoelectric vibration suppression actuators.

Within three months DSM designed, developed, produced and delivered a demonstration system for Boeing to test. One month later, DSM was able to deliver a MIL-I flight qualified unit. The shaker system was subsequently delivered to the ISS by the Space Shuttle Endeavor.


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Variable Velocity Z-stage for dip coating

DSM's variable-velocity Z-stage is specifically designed for smooth, vertical translation with a wide range of velocity control (from 3 microns/minute to 300,000 microns/minute) for polymer dip coating applications.

DSM makes the Z-stage system available as either a turnkey system or as a design kit that provides a list of the key components, vendors, and part numbers as well as the associated machine and assembly drawings for fabricating the structural components.

Open source control and command software for the system is available in Visual Basic and uses RS-232 protocol. Alternatively, users can communicate directly with the motor controller through standard RS-232 serial commands. Available motion segments include "Incremental," "Absolute," "Move To," "Pause," and "Wait" options. The motion software includes a "Homing" routine and an "Abort" function.

The linear stage is supported by stiff aluminum spine and base plates to preclude disturbances from any low-frequency environmental vibrations. The system assembly includes optical home and end-of-travel limit switches.

The Z-stage system design can be readily customized for additional motion range and/or additional payload capability.


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Large Goniometer for Retroreflectivity Standards Development

Congress directed the U.S. Department of Transportation to establish "a standard for a minimum level of retroreflectivity that must be maintained for pavement markings and signs which apply to all roads open to public travel." The National Cooperative Highway Research Program (NCHRP) awarded the Optical Technology Division of the National Institute of Standards and Technology (NIST) a contract to develop a "National Calibration Facility for Retroreflective Traffic Control Materials."

NIST in turn contracted with DSM to design and build a large, high-precision goniometer mechanism that will be the central system of this new National Calibration Facility. The goniometer provides closed loop control of six independent degrees of freedom and travels over 100 feet on precision rail assemblies. The system was successfully installed in the summer of 2003.

This project was highlighted in the Spring 2004 Edition of PXI Technologies Review.


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Depending upon the application and customer requirements, DSM can integrate a complete motion system based on custom components and/or industry standard equipment including National Instruments motion products. DSM is a Certified LabVIEW Associate Developer (CLAD) and a NI Alliance Member with a focus on motion control.

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     © 2014 Dynamic Structures & Materials, LLC (www.dynamic-structures.com & www.dsmpiezo.com)