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USB Motion Control 19" Rack Chassis


  • Up to 12 Drive Channels in a Single Chassis
  • Motor, Piezo and Auto-Alignment Driver Modules
  • Ideal for Creating Multi-Axis Intergrated Positioning Systems

MMR601

Full Suite of Software
Support Tools Included

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Features

The APT™ MMR601(602) 19" Rack System is a multi-channel multi function modular architecture designed specifically for high axis count motion control applications. This new system is a sophisticated, self-contained, extendable-architecture, precision motion control platform. As a modular system it is possible to load it with the exact number and mix of required control modules covering motor drives (MST), piezo drives (MPZ) and the powerful Thorlabs NanoTrak™ autoalignment technology (MNA). It deploys the same advanced high speed digital signal processing (DSP) technology and low noise analog circuitry pioneered in the equivalent APT™ bench top controllers.

The modular rack is available with a cover (MMR602) for benchtop use, or without a cover (MMR601) for mounting in a standard 19" cabinet, and provides a highly functional 12 channel platform within the 'footprint' of a 4U high, 19" wide enclosure.

USB connectivity provides easy plug and play PC operation. Coupling this with the very user friendly APT software allows the user to very quickly get up and running with reasonably complex move sequences in a short period of time. For example, all relevant operating parameters are set automatically for Thorlabs stage and actuator products. Advanced custom motion control applications and sequences are also possible using the extensive ActiveX® programming environment described in more detail on the Motion Control Software and APT Tutorials tabs.

As a member of the APT family of motion controllers and by virtue of the highly flexible APT system software it is perfectly feasible to combine operation of this rack system with any of the APT bench top controllers and control everything from the same unified software interface - allowing a common learning curve for both bench top and rack based solutions.

SpecificationValue
EnclosureStandard 19" Rack, 4U High
Module Bays6 Modular Slots, Back Panel Access
CommunicationsUSB 1.1 Interface
Power Input
Voltage85-264 VAC
Frequency47-63 Hz
Power800 W
Fuse15 A
Dimensions (W x D x H):480 x 448 x 183 mm (19.0" X 17.6" X 7.0")
Weight16 kg (35.2 lbs)

Thorlabs offers two platforms to drive our wide range of motion controllers: our legacy APT™ (Advanced Positioning Technology) software package or the new Kinesis software package. Either package can be used to control devices in the APT or Kinesis family, which covers a wide range of motion controllers ranging from small, low-powered, single-channel drivers (such as the K-Cubes and T-Cubes) to high-power, multi-channel, modular 19" rack nanopositioning systems (the APT Rack System).

Our legacy APT System Software platform is available by clicking on the link below. It features ActiveX-based controls which can be used by 3rd party developers working on C#, Visual Basic, LabVIEW or any Active-X compatible languages to create custom applications, and includes a simulator mode to assist in developing custom applications without requiring hardware.

APTConfig
APT GUI Screen

The Kinesis Software features new .NET controls which can be used by 3rd party developers working in the latest C#, Visual Basic, LabVIEW or any .NET compatible languages to create custom applications. Low level DLL libraries are included for applications not expected to use the .NET framework. A Central Sequence Manager supports integration and synchronization of all Thorlabs motion control hardware.

By providing these common software platforms, Thorlabs has ensured that users can easily mix and match any of the APT and Kinesis controllers in a single application, while only having to learn a single set of software tools. In this way, it is perfectly feasible to combine any of the controllers from single-axis to multi-axis systems and control all from a single, PC-based unified software interface.

The software packages allow two methods of usage: graphical user interface (GUI) utilities for direct interaction with and control of the controllers 'out of the box', and a set of programming interfaces that allow custom-integrated positioning and alignment solutions to be easily programmed in the development language of choice.

A range of video tutorials are available to help explain our APT system software. These tutorials provide an overview of the software and the APT Config utility. Additionally, a tutorial video is available to explain how to select simulator mode within the software, which allows the user to experiment with the software without a controller connected. Please select the APT Tutorials tab above to view these videos, which are also available on the software CD included with the controllers.

Software

APT Version 3.21.1

The APT Software Package, which includes a GUI for control of Thorlabs' APT™ and Kinesis® system controllers.

Also Available:

  • Communications Protocol
Software Download

Software

Kinesis Version 1.14.1

The Kinesis Software Package, which includes a GUI for control of Thorlabs' Kinesis and APT™ system controllers.

Also Available:

  • Communications Protocol
Software Download
APTConfig
Kinesis GUI Screen

These videos illustrate some of the basics of using the APT System Software from both a non-programming and a programming point of view. There are videos that illustrate usage of the supplied APT utilities that allow immediate control of the APT controllers out of the box. There are also a number of videos that explain the basics of programming custom software applications using Visual Basic, LabView and Visual C++. Watch the videos now to see what we mean.

 Click here to view the video tutorial 

To further assist programmers, a guide to programming the APT software in LabView is also available.

Labview IconClick here to view the LabView guideLabview Icon

Piezo Driver Bandwidth Tutorial

Knowing the rate at which a piezo is capable of changing lengths is essential in many high-speed applications. The bandwidth of a piezo controller and stack can be estimated if the following is known:

  1. The maximum amount of current the controllers can produce. This is 0.5 A for our BPC Series Piezo Controllers, which is the driver used in the examples below.
  2. The load capacitance of the piezo. The higher the capacitance, the slower the system.
  3. The desired signal amplitude (V), which determines the length that the piezo extends.
  4. The absolute maximum bandwidth of the driver, which is independent of the load being driven.

To drive the output capacitor, current is needed to charge it and to discharge it. The change in charge, dV/dt, is called the slew rate. The larger the capacitance, the more current needed:

Piezo Equation 1

For example, if a 100 µm stack with a capacitance of 20 µF is being driven by a BPC Series piezo controller with a maximum current of 0.5 A, the slew rate is given by

Piezo Equation 2

Hence, for an instantaneous voltage change from 0 V to 75 V, it would take 3 ms for the output voltage to reach 75 V.

Note: For these calculations, it is assumed that the absolute maximum bandwidth of the driver is much higher than the bandwidths calculated, and thus, driver bandwidth is not a limiting factor. Also please note that these calculations only apply for open-loop systems. In closed-loop mode, the slow response of the feedback loop puts another limit on the bandwidth.

Sinusoidal Signal

The bandwidth of the system usually refers to the system's response to a sinusoidal signal of a given amplitude. For a piezo element driven by a sinusoidal signal of peak amplitude A, peak-to-peak voltage Vpp, and frequency f, we have:

Piezo Equation 3

A diagram of voltage as a function of time is shown to the right. The maximum slew rate, or voltage change, is reached at t = 2nπ, (n=0, 1, 2,...) at point a in the diagram to the right:

Piezo Equation 4

From the first equation, above:

Piezo Equation 5

Thus,
Piezo Equation 6

For the example above, the maximum full-range (75 V) bandwidth would be

Piezo Equation 7.

For a smaller piezo stack with 10 times lower capacitance, the results would be 10 times better, or about 1060 Hz. Or, if the peak-to-peak signal is reduced to 7.5 V (10% max amplitude) with the 100 µm stack, again, the result would be 10 times better at about 1060 Hz.

Triangle Wave Signal

For a piezo actuator driven by a triangle wave of max voltage Vpeak and minimum voltage of 0, the slew rate is equal to the slope:

Piezo Equation 8.

Or, since f = 1/T:

Equation 9

Square Wave Signal

For a piezo actuator driven by a square wave of maximum voltage Vpeak and minimum voltage 0, the slew rate limits the minimum rise and fall times. In this case, the slew rate is equal to the slope while the signal is rising or falling. If tr is the minimum rise time, then

Equation 11

or

Equation 12.

 

For additional information about piezo theory and operation, see the Piezoelectric Tutorials page.


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