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28 mm Linear Stage with Resonant Piezoelectric Motors


  • Linear Stage with Closed-Loop Positioning 
  • Open Frame Design for OEM Applications
  • Control via Interface Board, GUI, or ASCII Message Calls
  • Fully Integrated Drive Electronics

Interface Board

Linear Stage

ELL17K

Stage Bundle and Interface Board

Application Idea

The ELL17K Linear Stage Kit positions the slit to spatially filter incident light.

Direction of Travel

ELLB

Bus Distributor

Related Items


Please Wait
Key Specificationsa
Travel 28 mm (1.1")
Positioning Accuracy 100 µm
Homing Accuracy 150 µm
Repeatability (100 g Load) 60 µm
Velocity (Maximum, No Load) 180 mm/s
Maximum Total Load 200 g (0.441 lbs)
DC Voltage Input 4.5 to 5.5 V
Weight of Stage and Bracket 0.168 lbs (0.076 kg)
Minimum Lifetimeb 100 km of Travel
  • See the Specs tab for complete specifications.
  • Not Intended for Continuous Operation
Elliptec OEM PageThorlabs' Elliptec Technology for OEM
The Connected Components of the ELL7K Linear Stage Bundle
Click to Enlarge

The components of the ELL17K(/M) linear stage bundle are shown connected and with key features labeled.

Features

  • Ideal for OEMs and Applications Requiring Rapid, Precise Positioning
  • Micro-B USB and Picoflex®1 Connectors for Control Signals
  • Multi-Drop Serial Communication Protocol Supported
  • Linear Stage with One 8-32 (M4) and Four 4-40 (M3) Tapped Holes
  • Magnetic Incremental Linear Encoder Used to Position Stage
  • Bus Distributor Facilitates Control of up to Four Elliptec Devices

Driven by Thorlabs' Elliptec™ piezoelectric resonant motor technology, this linear stage is designed to be a compact solution for OEM applications requiring linear movement. Thorlabs offers the ELL17K(/M) linear stage bundle containing the ELL17(/M) stage, an interface board for manual control of the stage, a 5 VDC power supply, a ribbon cable for connecting the stage to the interface board, and a USB cable for connecting the interface board to a PC. The ELL17(/M) stage can be purchased individually.

Each stage has one center 8-32 (M4) tapped hole for attaching a single component and the four 4-40 (M3) tapped holes may be used to secure an adapter plate, such as the MMP1(/M) or RB13P1(/M).The stage is lightweight and compact with a mass of 0.052 kg and footprint of 68.0 mm x 67.0 mm when the stage is centered. The full travel range of the stage requires 7.5 mm of clearance on either side. The closed-loop operation allows the translating platform to be positioned with an accuracy of 100 µm and a repeatability of 60 µm. The assembled components of the ELL17K(/M) are shown in the image to the right, with key features labeled.

The motor is highly dynamic and has no gearing. The tips of both motor housings are in firm contact with the plastic track at the base of stage, as can be seen in the image at the right. The motors are installed with opposite orientations and translation in both directions occurs when one motor pushes the track forward while the other pulls it backward. The linear stage is not designed for continuous operation. We recommend operation with duty cycles of 40% or less. When power is not applied to the motors, the stage is held in place by an approximately 1 N combined force exerted by the stationary arms of the motors. Please see The Elliptec™ Motor tab for more information.

The open frame format, simplicity, and adaptability of this linear stage make it attractive for OEM applications, as it can be customized according to customer requirements and produced in high-volume quantities. Please contact us to discuss your specific requirements so that we may tailor a solution to meet the needs of your application.

Control
There are multiple options for powering, driving, and controlling this stage, which are detailed in the Positioning the Linear Stage section of the Operation tab. The stage possesses a 3.3 V serial bus and is designed to be operated with or without the interface board; the Pin Diagram tab provides pin assignments. Thorlabs offers software for our Elliptec products capable of providing full and independent control of the stage. When the interface board is used as an accessory to change the position of the stage, its status in the software is automatically updated. 

Elliptec Resonant Motor Products
Dual Position Slider ELL17 Linear Stage ELL20 Linear Stage ELL18 Rotation Stage ELL14 Rotation Mount
Multi-Position Sliders 28 mm Linear Stage 60 mm Linear Stage Rotation Stage Rotation Mount

Multiple Elliptec devices can be controlled using the ELLB Bus Distributor or by splicing multiple connectors onto one ribbon cable. A single bus distributor can connect up to four Elliptec devices; up to 16 devices can be connected if the buses are daisy chained. This bus can be controlled one of three ways: through an interface board (included with the bundles below) to connect to a PC running the Elliptec software, by connecting to an Arduino®2 or Raspberry Pi®3 board, or by wiring the connector pins to a user-supplied control board. Alternatively, up to 16 devices can be spliced onto a single ribbon cord. The devices can then be simultaneously controlled by the interface board or selectively controlled by the Elliptec software. See the manual for instruction on how to splice multiple devices onto a ribbon cord and the Pin Diagrams tab for pin assignments when making custom connections.

  1. Picoflex is a registered trademark of Molex Incorporated.
  2. Arduino is a registered trademark of Arduino Sa Société Anonym (SA).
  3. Raspberry Pi is a registered trademark of the Raspberry Pi Foundation.
Specificationsa
Performance
Travel 28.0 mm (1.1")
Positioning Accuracy 100 µm
Homing Accuracy 150 µm
Repeatability (With 100 g Load) 60 µm
Velocity (Maximum, No Load) 180 mm/s
Acceleration (Maximum, No Load) 6.0 m/s2
Minimum Holding Force (Both Motors Engaged) 1 N
Vertical Straightness (Runout)b 10.0 µm
Horizontal Straightness (Runout)b 10.0 µm
Pitch (Over Full Travel Range) 2.4 mrad
Yaw (Over Full Travel Range) 2.4 mrad
Full-Scale Nonlinearity Error <120 µm
Encoder Resolution 0.98 µm
Velocity Compensation (No Load)c 60% to 100%
Maximum Total Loadd 0.200 kg (0.441 lbs)
Minimum Lifetimee 100 km of Travel
Electrical
Motor Type Elliptec Resonant Piezo
DC Voltage Input 4.5 to 5.5 V
Typical Current Consumption During Movement
(No Load)
0.90 A
Typical Current Consumption During Standby 0.07 A
Communications
Busf Multi-Drop 3.3 V/5 V TTL RS232
Connector on Linear Stage Board Picoflex®
Connectors on Interface Board Picoflex®
Micro-B USB
5 VDC Power:
[For Plug with Ø5.5 mm OD (Ground)
and Ø2.1 mm ID (+5 V)]
Speed 9600 baud
Data Length (1 Stop Bit, No Parity) 8 bit
Protocol Data Format ASCII HEX
Module Address and Command Format Mnemonic Character
8-Conductor Ribbon Cable Length (Supplied) 0.250 m
8-Conductor Ribbon Cable Length (Maximum) 3 m
Mechanical
Mounting Threads (On Stage) One 8-32 (M4), Four 4-40 (M3)
Depth: 4 mm (0.16")
Dimensions of the Linear Stage Board
(Without Bracket)
68.0 x 67.0 x 15.3 mm
(2.68" x 2.64" x 0.60")
Dimensions of the Linear Stage Board
(With Bracket)
 68.0 x 67.0 x 18.4 mm
(2.68" x 2.64" x 0.73")
Dimensions of the Interface Board 32.0 mm x 66.0 mm x 12.5 mm
(1.26" x 2.60" x 0.49")
Weight of the Linear Stage Board (Without Bracket) 0.052 kg (0.114 lbs)
Weight of the Linear Stage Board (With Bracket) 0.076 kg (0.168 lbs)
Environmental Operating Conditions
Temperature Range 15 to 40 °C (59 to 104 °F)
Maximum Relative Humidity (Non-Condensing) <80% at 31 °C
Maximum Altitude 2000 m
  • Performance specifications are given for the case when the linear stage is mounted as recommended in the Operation tab.
  • Deviation from the Ideal Path, Referenced to a Theoretical Straight Line
  • The velocity of the stage can be adjusted to a value equal to or greater than 60% of the maximum velocity through use of the ASCII message calls described in the communications protocol manual.
  • Applies when the stage is mounted with the top surface in the horizontal plane, or when the stage is mounted vertically such that the load translates side to side. The stage is not designed to move a load up and down.
  • The linear stage is not designed for continuous operation.
  • Use two 10 kΩ pull-up resistors in multi-drop mode for RX/TX.
Components of the ELL7K Bundle
Click to Enlarge

Components of the ELL17K(/M) Bundle
(One Region-Specific Power Adapter Included with the Power Supply)

As shown in the image above, a mounting bracket is included with the bundle. The bracket fastens to the underside of the linear stage's PCB with the four included screws. Two slots in the bracket align with the Ø11.0 mm (Ø0.43") holes at either side of the PCB, so that 1/4"-20 (M6) cap screws can be inserted through the holes in the PCB to secure the linear stage board to optical tables and breadboards. The bracket adds 5.0 mm of thickness to the profile of the stage. The drawing below shows the dimensions and mounting features of the stage itself.

Mechanical Drawings of the Linear Stage
Click to Enlarge

Mechanical Drawing of the Linear Stage
Mechanical Drawings of the Remote Handset
Click to Enlarge

Mechanical Drawing of the Interface Board
Connector J1 Pinouta,b
Pin Type Function
1 PWR Ground
2 OUT ODTX - Open Drain Transmit 3.3 V TTL RS232 
3 IN RX Receive - 3.3 V TTL RS232
4 OUT In Motion, Open Drain Active Low Max 5 mA
5 IN JOG/Mode, Active Low Max 5 V
6 IN BW Backward, Active Low Max 5 V
7 IN FW Forward, Active Low Max 5 V
8 PWR VCC +5 V ± 10%; 900 mA
  • Connector Model Number MOLEX 90814-0808;
    Mating Connector Model Number MOLEX 90327-0308
  • A polarity indicator is engraved onto each PCB next to the Picoflex® connector, as shown in the drawing to the left, to assist with properly connecting the interface board to the main unit. The red wire in the ribbon cable should be adjacent to this indicator. Not doing so can harm the unit.
Pinout Diagram of the Picoflex Connector on the Linear Stage PCB
Click to Enlarge

Pinout diagram of the Picoflex® connector is shown referended to a partial diagram
of the Linear Stage Board. The polarity indicator on the connector
must be adjacent to the red wire on the supplied 8-connector cable.

ELLB Connector J1, J2, J3, and J4 Pinouta,b
Pin Type Function
1 PWR Ground
2 OUT OTDX - Open Drain Transmit 3.3 V TTL RS232 
3 IN RX Receive 3.3 V TTL RS232
4 OUT In Motion, Open Drain Active Low Max 5 mA
5 IN Not Connected
6 IN Not Connected
7 IN Not Connected
8 PWR VCC +5 V ± 10%; 800 mA per Connected Device
  • Connector Model Number MOLEX 90814-0808;
    Mating Connector Model Number MOLEX 90327-0308
  • A polarity indicator is engraved onto each PCB next to the Picoflex® connector, as shown in the drawing to the left, to assist with properly connecting the interface board to the main unit. The red wire in the ribbon cable should be adjacent to this indicator. Not doing so can harm the unit.
Pinout Diagram of the Picoflex Connector on the ELLB Bus Distributor
Click to Enlarge

Pinout diagram of the Picoflex® connector is shown referenced to a simplified diagram
of the ELLB Bus Distributor. The polarity indicator on the connector
must be adjacent to the red wire on the supplied 8-connector cables.

Operation Notes

This tab contains information on handling, mounting, and operating the ELL17K(/M) Linear Stage Bundle.

Contents

 

The Linear Stage with Adapter Plate RB13P1/M Mounted
Click to Enlarge

The Linear Stage Board with Adapter Plate RB13P1 Mounted to the Top of the Stage
The Linear Stage
Click to Enlarge

The Linear Stage (Without the Bracket)
Features of the Linear Stage
Click to Enlarge

Features of the Linear Stage
The Interface Board
Click to Enlarge

The Interface Board
The Interface Board
Click to Enlarge

Features of the Interface Board

Handling

The linear stage and interface board included in the ELL17K(/M) bundle are robust to general handling. To ensure reliable operation, keep the surface of the plastic track contacted by the motors free of oils, dirt, and dust. It is not necessary to wear gloves while handling the linear stage, but avoid touching the track to keep it free of oils from fingerprints. If it is necessary to clean the track, it may be wiped with isopropyl alcohol or mineral spirits (white spirit). Do not use acetone, as this solvent will damage the plastic track.

The open frame format of the ELL17(/M) stage can tolerate up to 8 kV of static discharge. ESD precautions should be taken, as an electrostatic discharge can produce an electrical signal that may cause unintended movement of the stage. A bending load in excess of 500 g applied to the board may cause the PCB to deform, which will degrade the performance of the linear stage. As readings from a magnetic sensor are used during the homing and positioning of the stage, avoid subjecting the structural PCB to excessive loads or magnetic fields. Limit the strength of magnetic fields in proximity to the magnetic sensor to ±5 mT to avoid negatively affecting the homing and positioning operations.

Mounting and Loading the Linear Stage

The linear stage can be operated with the top surface of the stage in the horizontal or the vertical plane. If the latter is chosen, orient the stage so that it moves side to side rather than up and down. A mounting bracket included with the ELL17K(/M) fastens to the underside of the linear stage's PCB with the four included screws. Two slots in the bracket align with the Ø11.0 mm (Ø0.43") holes at either side of the PCB, so that 1/4"-20 (M6) cap screws can be inserted through the holes in the PCB to secure the linear stage to an optical table or breadboard. Alternately, the bracket can be omitted and the four slotted holes in the PCB used to attach the stage to a custom fixture. Ensure that electrically conductive structures are not in contact with the back of the board, as this may cause electrical shorts detrimental to the operation of the stage. When mounting the stage, ensure that the installation does not bend the PCB. 

Loads may be mounted to the stage using the 8-32 (M4) or four 4-40 (M3) tapped holes at the center. The spacing of the 4-40 (M3) tapped holes is designed to be compatible with adapter plates such as the MMP1(/M) and RB13P1(/M), as shown in the image to the upper right. The maximum allowed weight of the mounted components is 200 g. In all cases of mounting and loading, ensure that nothing interferes with the moving parts of the linear stage and that the stage and its load are securely fastened to prevent jostling during movement. Jostling of the stage or the load can cause an encoder error.

Supplying Power

When the setup includes the interface board, power may be supplied through the Micro-B USB connector and/or the 5 VDC power socket located on the board. The electronics on the interface board convert the applied DC signal to a sinusoidal signal oscillating at the required resonance frequency.

The ELL17K(/M) bundle includes a 5 VDC power supply whose connector mates with the power socket on the interface board. Delivering power through this socket also allows the Micro-B USB connector to be used for a computer to control the stage remotely. The power supplied by a computer through the USB 2.0 connection is not sufficient to power the stage. If computer control is not necessary, another option for supplying power to the stage is a portable USB 5 V battery pack connected to the Micro-B USB connector on the interface board.

When the implementation does not include the interface board, the connection with the power source is made using the pins on the Picoflex® connector that is included on the linear stage board. A pinout diagram of this connector is included in the Pin Diagram tab, and information on powering and addressing the linear stage is given in the manual and the communications protocol manual, respectively.

Operation of the Motors

The motion of the linear stage is controlled by forcing the piezoelectric elements to vibrate at specific ultrasonic frequencies. For each motor, there is an ultrasonic resonant frequency that will push the stage forward, and another that will pull the stage backward. Operating a motor at one of its resonance frequencies causes the tip of the motor to continuously cycle in a tight clockwise elliptical path. When the motor is driven at its other resonant frequency, the tip of the motor cycles through that same path in a counterclockwise direction. Both resonant frequencies are around 100 kHz. The total displacement at the tip of the motor is a function of the mechanical load it is driving and the voltage supplied to the piezo element. In the case of no loading and a 5 V maximum driving voltage at a resonant frequency, the tip of the motor expands and contracts by no more than a few microns while tracing the elliptical path. Please see The Elliptec™ Motor tab for more information and an animation illustrating the operational principle of the motors.

Homing the Linear Stage

To Home the stage, press the BW button on the interface board, click the Home button in the Elliptec™ software's graphical user interface (GUI), or send the appropriate ASCII message as is specified in the communications protocol manual. The stage uses a relative (incremental) magnetic sensor with an encoder resolution of 0.98 µm to home and position the stage. During the procedure to define the default Home position, the stage is translated forward and backward to index the limits of travel. The default Home position is located at the backward limit of the stage's range of motion. If desired, the user may redefine the position of Home to be offset from the default position. Being able to customize the Home position can be useful when synchronizing the orientations of two or more stages. 

Positioning the Linear Stage

Note that the linear stage is not intended for continuous operation. We recommend operation with duty cycles of less than 40% during general use, while operation with duty cycles greater than 60% should be limited to a few seconds.

Before the stage may be positioned, the Home position of the stage must be found. Please see the previous section for details. The movement of the stage may be controlled by pressing buttons on the interface board, through computer control via the Elliptec software package that may be downloaded, or by sending simple signals to digital lines on the stage's board. The buttons on the interface board can be seen in the image of the interface board above. A link to download the software and accompanying documentation can be found in the Software tab. The interface board may be used as an accessory while interfacing with the stage through the Elliptec software; all changes in the position of the linear stage that occur as a result of pressing buttons on the interface board are registered by the software, and the software may independently control the linear stage while the interface board is connected.

Multiple Elliptec devices can be be controlled using the ELLB Bus Distributor or by splicing multiple connectors onto one ribbon cable. A single bus distributor can connect up to four Elliptec devices; up to 16 devices can be connected if the buses are daisy chained. This bus can be controlled one of three ways: through an interface board (included with the bundles below) to connect to a PC running the Elliptec software, by connecting to an Arduino® or Raspberry Pi® board, or by wiring the connector pins to a user-supplied control board. Note that if an interface board is used, its on-unit buttons will be disabled. Alternatively, up to 16 devices can be spliced onto a single ribbon cord. The devices can then be simultaneously controlled by the interface board or selectively controlled by the Elliptec software. See the manual for instruction on how to splice multiple devices onto a ribbon cord and the Pin Diagrams tab for pin assignments when making custom connections. The communications protocol manual describes how to use the software to individually address each connected device. A link to download the software and accompanying documentation can be found in the Software tab.

The interface board can be used to move the stage forward and backward in increments by pressing and holding the JOG button while pressing and releasing the FW or BW button, respectively. The default increment is 2 mm, and a custom step size can be set using the Elliptec software or by sending the appropriate ASCII message(s) as specified in the communications protocol manual. The Elliptec software can be used to move the stage to absolute and relative positions, in addition to jogging the stage forward or backward. The software is also used to set the jog step size, read the position of the stage, and adjust the position of Home, as is described in the previous section. The velocity of the stage can be adjusted to a value equal to or greater than 60% of the maximum velocity through use of the ASCII message calls described in the communications protocol manual.

The stage learns to efficiently position itself precisely using a position error compensation algorithm. After the stage moves into a new position, it detects the error between the requested and actual positions. The position of the stage is then corrected, and an error compensation value is calculated. The algorithm is then updated with the error compensation value, so that it is applied when the stage is move to its next position. Typically, an optimum error compensation value is found after between two and six movements.

Resonant Frequencies

On power-up, the factory default setting instructs each motor driving the linear stage to search for the resonant frequencies that will deliver the best performance. During this process, the linear stage will translate forward and backward. If movement on start-up is undesirable, it is possible to disable this calibration procedure by using the serial port to initialize the frequencies on power-up. A new search for optimal resonant frequencies may be performed at any time; to maintain optimal performance, it is recommended that new searches be performed after changes in loading and/or ambient temperature. Please see the manual for details.

The Components of the Elliptec Motor
Click to Enlarge

The Components of the Elliptec Motor
The Elliptec Piezoelectric Resonant Motor
Click to Enlarge

The Elliptec Piezoelectric Resonant Motor

The Elliptec™ Piezoelectric Resonant Motor

Thorlabs' Elliptec™ piezo resonant motor, shown at right, is lightweight, with a mass of 1.2 g, and compact: the dimensions of the resonator housing, excluding the spring, are 8 mm x 4 mm x 20 mm.

Components of the Motor

The components that compose the motor are shown at far-right. The piezoelectric element is press fit into the aluminum resonator, which has been precisely designed and machined to produce the desired elliptical motion at the tip and to interface optimally with the driven module. The free ends of the spring are integrated with the resonator housing. The wires, which are soldered to the top and bottom of the piezoelectric element, deliver the voltage signal that induces the piezoelectric element to vibrate at ultrasonic frequencies.

When the motor is built into a system, the open loop of the spring is bolted to a sturdy surface that is stationary with respect to the item to be driven, and the tip of the resonator is placed in contact with the item. The purpose of the spring is to maintain constant contact between the tip of the resonator and the driven item, and the direction of motion is determined by the resonance frequency at which the piezo element is driven.

Elliptical Motion and Comparison with Conventional Motors

Elliptec motors quickly and precisely position stages and mounts while never seeming to move. Their microscopic movements occur at ultrasonic frequencies and are invisible to the naked eye.

The motor is operated by driving it at one of its two resonance frequencies. A voltage signal oscillating at an ultrasonic frequency is applied to the piezoelectric chip, which responds by expanding less than a micron and then contracting back to its original dimensions at the frequency of the driving signal. This rapid-cycling change in the chip's dimensions causes a vibration in the aluminum resonator housing. When the vibration is at one of the housing's resonance frequencies, a pushing motion results at the tip of the motor. When the vibration is at the other resonance frequency a pulling motion results.

As illustrated in the video, the pulling and pushing motions result from the tip of the motor tracing an elliptical path in space when the motor operates at resonance. The selected resonance frequency controls the direction of the cyclical motion. The motor's tip traces one half of the ellipse as it expands and the other half as it contracts. When the motor pushes the driven item, the motor's tip is in contact with the item while the tip expands; the two are not in contact while the tip contracts. The converse is true when the motor pulls the driven item in the opposite direction. The total displacement at the tip of the motor is a function of both the mechanical load it is driving and the voltage supplied to the piezo element. The maximum displacement can be up to a few microns when the peak driving voltage is 5 V.

The motor behaves in many ways like a DC or electromagnetic stepper motor, but it does not suffer from many of the drawbacks of these conventional motors. Unlike conventional electromagnetic motors, which must overcome inertial delays to come to a stop, the highly dynamic Elliptec motor can stop within microseconds. As it has no gears, it does not exhibit backlash. Since it possesses no magnets, it is compatible with use in environments sensitive to electromagnetic interference. The motion of the driven element is continuous and smooth. As the tip of the motor must be in contact with the driven item to induce motion, the motor possesses the safety feature of an inherent friction brake. When in contact with a plastic surface, the motor operates virtually silently.

For OEM applications, the motor can be manufactured in volume at low cost, and it can be driven by inexpensive analog electronics. It does not require microprocessors or software; however it is compatible for use with them.

Screen Capture of the Elliptec Piezoelectric Resonant Motor Control Software GUI
Click to Enlarge

The Elliptec Piezoelectric Resonant Motor Control Software GUI

Software for Devices Driven by Elliptec™ Piezoelectric Resonant Motors

All devices based on the Elliptec™ resonant piezo motor may be controlled by the Elliptec system software, which features an intuitive graphical user interface (GUI). The source code, in C# format, is included in software bundle available for download, and custom applications can be created in any language. The image at right shows a screen capture of the GUI, and the button that follows links to the download page.

Commands are entered in the Sequencer command / wait order section located at the center-left of the GUI. An example of a sequence of commands that might be sent to the device is "Agj" to get the jog step size of the stage at address "A," "Asj0000200" to set the jog step size as 0.25 mm, and "Abw" to jog the stage at address "A" backward by 0.25 mm. The command "As1" is used to perform the frequency search that will identify the optimal resonant frequencies, for the current operating conditions, for Motor 1 at adddress "A."

Software

Version 1.5.0

Includes the Elliptec System Software, with an easy-to-use GUI. Also available for download is the Communications Protocol manual, which details the communication commands for the Elliptec software package.

Software Download

Posted Comments:
g.laliberte  (posted 2018-09-18 06:31:31.553)
Hi, We'd like to know if this has been tested at cryogenic temperature, and if it worked? Best Regards Gabriel Laliberte Canada Research Chair in Quantum Microwave Radiation Physics Department , Quantum Insitute, Universite de Sherbrooke 2500 boul. de l'universite Sherbrooke, Québec Canada J1K 2R1 819-821-8000 ext. 66489
AManickavasagam  (posted 2018-09-18 11:28:47.0)
Response from Arunthathi @ Thorlabs: Thanks for your query. Unfortunately, these have not been tested at cryogenic temperature. At such condition the stage might be brittle (as the frame is plastic) and cease function.
loven015  (posted 2018-06-11 09:40:50.453)
Is it possible to change the units reported in the software from imperial to metric? We have the imperial board but would really prefer to measure in millimeters.
AManickavasagam  (posted 2018-06-15 08:09:32.0)
Response from Arunthathi at Thorlabs: Unfortunately, with an imperial board you will not be able to measure in millimeters.
user  (posted 2018-06-05 18:37:56.14)
The velocity is way too fast, even with 200g load on it. And when I try to slow down the velocity (by sending "AsvXX"), the motor stopped working. How can I slow down the velocity to 12mm/s or 25mm/s?
rmiron  (posted 2018-06-06 04:48:20.0)
Response from Radu at Thorlabs: Depending on the load, velocities less than 25% to 45% of max will likely cause the device to stall. Unfortunately, since 25mm/s corresponds to ~14% of the max velocity, I think you are probably unable to achieve those speeds using ELL7.
matsk  (posted 2017-11-28 15:03:14.887)
The bundled C# software don't compile. Opening the ELLO solution in Visual Studio 2017, and trying to compile gives several errors. Severity Code Description Project File Line Suppression State Error CS2001 Source file 'P:\libs\elliptec\ELLO_DLL\ELLBaseDevice.cs' could not be found. Error CS2001 Source file 'P:\libs\elliptec\ELLO_DLL\ELLPaddlePolariser.cs' could not be found.Active Error CS0006 Metadata file 'P:\libs\elliptec\ELLO_DLL\bin\Debug\Thorlabs.Elliptec.ELLO_DLL.dll' could not be found ELLO_DLL_Test Error The project file contains a property value that is not valid. ELLO Error File 'Views\ELLPaddlePolariserView.xaml' cannot be found. ELLO Error File 'Views\ELLPaddleView.xaml' cannot be found. ELLO How can I use the product if i can't compile the source code? Is there a simple C interface for this product? Best regards, tk
bwood  (posted 2017-12-06 06:24:08.0)
Response from Ben at Thorlabs: I am sorry to hear about your issues here. We will be in direct contact with you to troubleshoot this software issue.
sergio.vilches  (posted 2017-09-14 12:28:12.74)
It seems that the maximum rate at which the stage can be commanded to jog is about 2 Hz, either using the onboard switches or the serial interface. Is there any way to improve this response time? For example, using the switches for open loop control, i.e. that the stage moves as long as the switch is actuated. This would open new possibilities for this stage, for example, as part of a closed loop system.
bhallewell  (posted 2017-09-18 10:07:27.0)
Response from Ben at Thorlabs: Thank you for outlining your requirements. This will generally be dependent upon your application. I will contact you directly to get a discussion going.
hthakur1611  (posted 2017-06-08 10:55:53.287)
I have connected the interface board via USB and trying to find it with the Ello software. But it is saying 0 devices found. What can be the problem ?
bwood  (posted 2017-06-08 09:54:26.0)
Response from Ben at Thorlabs: I am sorry to hear about your difficulties here. I will contact you directly to discuss troubleshooting the device. In general, the best way to diagnose a USB issue is to swap USB cables, swap USB ports, and connect the device directly to the USB ports on the back of your computer. You can also open up device manager on your computer, and see if the USB device is present.
ali  (posted 2017-04-19 17:07:48.403)
The interface board provides the functionality of moving the stage in fixed steps forward or backward. Is that possible to move the stage to a specified absolute or relative position without using ELLO software? I want to have a standalone solution without the need of connecting the board to the computer.
bhallewell  (posted 2017-05-10 10:13:56.0)
Response from Ben at Thorlabs: Thank you for your question. It is not possible to persist a jog under two preset absolute positions & persist this outside of ELLO software. This is stored in volatile memory & so is lost on power cycle or software reset.
gregor.anich  (posted 2016-12-01 09:15:14.627)
I have multiple short questions: 1) As the device uses a magnetic sensor, can the positioning (home position) be affected by switching of magnetic fields nearby the device, even if the stage is not moved while switching fields? Or will external magnetic fields only interfere while the stage is moving? 2) Can excessive fields damage the sensor, or will they only confuse it? 3) I would need the stage to move a beam splitter into and out of a beam path. For this application only the homing position at one side of the travel is relevant. Could this be improved by adding some mechanical stop and just move the stage against that stop, or is that a bad idea? (Maybe you have another product better suited to my application?) Thanks, Gregor A.
bwood  (posted 2016-12-05 10:17:46.0)
Response from Ben at Thorlabs: Thank you for your questions, let me try and answer each of them in turn: 1) Magnetic fields should only affect the stage during homing. 2) We estimate it would table external magnetic fields in the Tesla range to begin to the impact performance of the device. 3) The stage already has mechanical stops, which are used in the normal function of the stage. If you are moving an optic in and out of the beam path, perhaps you could also consider the ELL6k. Although, the ELL6 may only be suitable for plate beamsplitters.
florent.haiss  (posted 2016-10-29 11:15:09.923)
Would it be possible to have a Labview example that controls absolute positioning and homing of the ELL7K. Thanks.
bhallewell  (posted 2016-11-16 09:50:14.0)
Response from Ben at Thorlabs: Thank you for your question. We have just today released a new version of the ELLO Elliptec Control Software which includes a .dll with core code examples contained. This can be downloaded from the following web link. https://www.thorlabs.com/software_pages/ViewSoftwarePage.cfm?Code=ELL
ludoangot  (posted 2016-10-28 12:26:28.72)
This is a very interesting concept and product. I have few questions: won't the plastic part in contact with the tip of the motor eventually wear? Given your magnetic position sensor has a 0.5um resolution, why can't more accurate homing and positioning be obtained? From releasing the communication protocol, it seems I should be able to write my own control software under linux, in such a case do I need the interface board? Finally do you offer an XY version of this stage, do you plan to offer it, or can one be made by simply assembling 2 linear stages? Thank you!
bhallewell  (posted 2016-11-07 06:42:12.0)
Response from Ben at Thorlabs: There will be some wear in the system however this is taken into account within the specified lifetime spec of our motion control stage (100 km of Travel). The force applied between the motor & rail will be dependent upon how the stage is loaded & fitted into your application. Drive force from the motor is altered during frequency optimisation & changes in temperature however overloading or continual use of the device can further affect this factor which will also contribute to wear. The homing accuracy is a compromise between speed & accuracy when altering load between 0 & 200g. The resolution is that of the encoder whereas the accuracy is deduced from the optimised PWM elliptical motion of the motor. You still need a TTL serial converter. The included handset is based on a FTDI chip which is generally supported by Linux. Unfortunately we don’t provide an XY variant of this stage & there may be some limitations from resistive force from cabling & off-axis load if these were to be stacked. I will contact you directly to discuss this.

Linear Stage Bundle

The Tips of the Motors Contacting the Edge of the Linear Stage
Click to Enlarge

The motors' aluminum tips contact the black plastic strip at the edge of the linear stage to translate the stage back and forth.
Application Idea Using Rotation Stage
Click to Enlarge
View Imperial Product List
Item #QtyDescription
ELL17K1Linear Stage Bundle: ELL17 Stage, Interface Board, Power Supply, Bracket, Cables
RB13P11Adapter Plate with 1/4"-20 and 8-32 Taps
VA1001Adjustable Mechanical Slit, 8-32 Tap, Imperial Micrometer
TR11Ø1/2" Optical Post, SS, 8-32 Setscrew, 1/4"-20 Tap, L = 1"
PH11Ø1/2" Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L = 1"
MB10121Aluminum Breadboard 10" x 12" x 1/2", 1/4"-20 Taps
SH4S02514-40 Stainless Steel Cap Screw, 1/4" Long, 50 Pack
SH8S07518-32 Stainless Steel Cap Screw, 3/4" Long, 50 Pack
View Metric Product List
Item #QtyDescription
ELL17K/M1Linear Stage Bundle: ELL17/M Stage, Interface Board, Power Supply, Bracket, Cables
RB13P1/M1Adapter Plate with M6 and M4 Taps
VA100/M1Adjustable Mechanical Slit, M4 Tap, Metric Micrometer
TR20/M1Ø12.7 mm Optical Post, SS, M4 Setscrew, M6 Tap, L = 20 mm
PH20/M1Ø12.7 mm Post Holder, Spring-Loaded Hex-Locking Thumbscrew, L=20 mm
MB2530/M1Aluminum Breadboard, 250 mm x 300 mm x 12.7 mm, M6 Taps
SH3M061M3 x 0.5 Alloy Steel Cap Screw, 6 mm Long, 50 Pack
SH6MS201M6 x 1.0 Stainless Steel Cap Screw, 20 mm Long, 25 Pack
ELL17K Linear Stage Bundle used to Position a Variable Slit
  • Ideal for OEM Evaluation Testing
  • Easily Integrate into a Setup
  • Operate using Manual and/or Computer Control
  • Included Power Supply is Required for Powering the Stage

The Linear Stage Bundle is a complete package that includes a linear stage and an interface board, which facilitate quick integration into laboratory setups and other experimental applications. It also provides a convenient means to evaluate incorporating this technology into OEM applications.

A mounting bracket included with the bundle fastens to the underside of the linear stage's PCB with four included screws. Two slots in the bracket align with the Ø11.0 mm (Ø0.43") holes at either side of the PCB, so that 1/4"-20 (M6) cap screws can be inserted through the holes in the PCB to secure the linear stage board to optical tables and breadboards. The bracket adds 5.0 mm of thickness to the profile of the stage.

Included in the ELL17K(/M) Bundle
ELL17(/M) Linear Stage 5 V Power Supply
8-Conductor 28 AWG Ribbon Cable
Interface Board Mini-B to Type-A USB Cable
Mounting Bracket PC-Based Software for Download
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
ELL17K Support Documentation
ELL17KLinear Stage Bundle: ELL17 Stage, Interface Board, Power Supply, Bracket, Cables
$393.46
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ELL17K/M Support Documentation
ELL17K/MLinear Stage Bundle: ELL17/M Stage, Interface Board, Power Supply, Bracket, Cables
$393.46
5-8 Days

Linear Stage

This linear stage is offered individually to meet the needs of applications whose designs require multiple networked Elliptec resonant motor products, or applications that do not require the other components included in the bundle above.

The ELL17 Linear Stage has a 28 mm travel range and a mounting surface featuring a center 8-32 (M4) tapped hole and four surrounding 4-40 (M3) tapped holes. Components may be mounted directly to the stage, or the 4-40 (M3) tapped holes can be used to secure an adapter plate, such as MMP1(/M) or RB13P1(/M), as a mounting surface. Please contact us to discuss customizing the stage, or to arrange to purchase a mounting bracket with the stage.

The PCB of the linear stage incorporates a male 8-pin Picoflex® connector (header). Each ELL17 stage ships with the female 8-pin Picoflex® connector (receptacle) that mates with the connector (header) on the board.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
ELL17 Support Documentation
ELL17Linear Stage: 28 mm Travel, One 8-32 and Four 4-40 Tapped Mounting Holes
$296.64
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+1 Qty Docs Part Number - Metric Price Available
ELL17/M Support Documentation
ELL17/MLinear Stage: 28 mm Travel, One M4 and Four M3 Tapped Mounting Holes
$296.64
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Bus Distributor

Specifications
Item # ELLB
Voltage Rating 4.5 to 5.5 V
Typical Current Consumption Per Module Movement 800 mA
Standby 50 mA
Maximum Board Current  4.0 A
Operating Temperature Range 15 to 40 °C
Ribbon Cable Length (4 Included) 250 mm
Maximum Supported Ribbon
Cable Length
500 mm
Dimensions 65.0 mm x 32.0 mm x 12.5 mm
(2.56" x 1.26" x 0.49")
Weight 11 g (0.02 lbs)

Click to Enlarge

A single bus distributor can be used to control up to four Elliptec devices. The bus can be connected to a PC using the interface board provided with the bundles sold above. Note that the bus is then controlled by the Elliptec software and that the buttons on the interface board are disabled.
  • Control and Power up to Four Elliptec™ Devices with One Bus
  • Daisy Chain Bus Boards to Control up to 16 Elliptec Devices
  • Controlled Remotely Using Elliptec System Software (See Software Tab Above)
  • Connect to PC Using USB Interface Board Included with Elliptec Bundles
  • Five Jumpers and Four 8-Conductor 28 AWG Ribbon Cables Included
  • Compatible with Raspberry Pi® and Arduino® Boards

The ELLB Bus Distributor connects up to four Elliptec™ devices. Connected devices can be controlled with or without the interface board included with the above bundles. When using the interface board, each connected device is controlled remotely by a PC running the Elliptec software package. The interface board connects to the bus's input port labeled REMOTE; once connected, the interface board's buttons are disabled. For control without using the interface board, see the Pin Diagrams tab for custom connections.

Multiple ELLB Bus Distributors can be daisy chained to control and power up to 16 Elliptec devices; simply connect one of the four MODULE outputs to the second board's REMOTE input. Indicator LEDs are provided to show which device is active. The communications protocol manual describes how to use the software to individually address each connected device. A link to download the software and accompanying documentation can be found in the Software tab.

The bus includes a Ø6.3 mm power connector that supports a 5 V supply with a maximum current of 4 A. As more devices are connected, simultaneous control of the units will require more current to be provided by the power supply; please see the Specs tab for the amount of current drawn by each Ellitpec device. Power supply options provided by Thorlabs include the TPS101 5 V, 2 A power supply and the 5 V, 1 A supply included with the above bundles. Depending on the current draw of the Elliptec devices connected, these supplies provides enough current to power two devices simultaneously.

Fourteen control pins, detailed in the image to the right, are included for additional functionality. Four pairs of pins are each shorted with a jumper that, when in place, enables the Elliptec software to receive feedback from connected Elliptec devices. The pair of pins labeled LED is shorted with a jumper that, when removed, will disable the indicator LEDs. The 5V and GND allow an optional, user-provided 5 V, 2 A power supply to be used in place of a source connected to the Ø6.3 mm power connector. The RX and TX pins can be used to control the bus with a Raspberry Pi® or Arduino® board, respectively, instead of the Elliptec interface board.

The board is mounted using the Ø3.5 mm through holes provided in each corner. Four 8-conductor, 28 AWG ribbon cables are included.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
ELLB Support Documentation
ELLBNEW!Control Bus Distributor for Elliptec Devices
$49.90
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