Compact Direct Drive Rotation Mount


  • Rotational Speeds Up to 5.0 Hz
  • SM05 (0.535"-40) Threaded Central Bore
  • 16 mm and 30 mm Cage System Compatible
  • Backlash-Free Direct-Drive Design

DDR25

Application Idea

Ø1" Linear Film Polarizer in a CRM1T Rotation Mount and Ø1/2" Linear Film Polarizer Threaded into the DDR25 Motorized Rotation Mount

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Key Specificationsa
Travel Range 360° Continuous
Maximum Velocity 5.0 Hz (1800 °/s)
Maximum Acceleration 29.1 Hz/s (10477 °/s2)
Bidirectional Repeatability 60 µrad (0.00344°)
Maximum Moment of Inertia of Load
About Rotation Axis		 70 kg•mm2
Central Aperture SM05 (0.535"-40) Threaded Bore
Motor Type Brushless DC Rotary Motor
Cable Length 3.0 m (9.8')
Required Controller (Sold Separately) KBD101
Mount Dimensions (L x W x H) 55.6 mm x 55.6 mm x 28.5 mm
(2.19" x 2.19" x 1.12")
  • Please see the Specs tab for complete specifications.

Click to Enlarge
Figure 1.1  The rear face of the rotation stage (shown) has four stationary tapped holes for 16 mm cage system rods. A 30 mm cage system can be continued from the back side of the stage by using an SP15(/M) 30 mm to 16 mm Cage Adapter Plate.

Features

  • 360° Continuous Rotation
  • High Speeds Up to 5.0 Hz (1800 °/s)
  • SM05 (0.535"-40) Threaded Central Bore for Compatibility with Ø1/2" Lens Tubes
  • Tapped Holes for 16 mm and 30 mm Cage System Integration
  • Compact Design: 55.6 mm x 55.6 mm x 28.5 mm
  • Integrated Brushless DC Servo Motor Actuators
  • High-Quality, Precision-Engineered Bearings

Thorlabs’ DDR25(/M) low-profile, direct-drive rotary mount provides continuous rotation of a load with a moment of inertia up to 70 kg•mm2 with a maximum rotation speed of up to 5.0 Hz (1800 °/s). An SM05 (0.535"-40) threaded central aperture allows an optical path to pass directly through the body of the mount and provides compatibility with Ø1/2" optical elements and Ø1/2" lens tubes. Components can be threaded into this bore from either side of the rotation mount.

The DDR25(/M) has a 3-phase, slotless, brushless DC motor integrated directly into the frame of the stage. This eliminates all forms of mechanical transmission, resulting in high repeatability, rigidity and reliability. The winding design enables good velocity stability, even at low speeds, by eliminating torque ripple due to magnetic cogging. The optical encoder has a 4.3 µrad theoretical resolution and provides high accuracy and repeatability, while the precision-engineered bearings and tight manufacturing tolerances produce low axial wobble. An engraved graduated scale with 2° increments allows for coarse positioning.

The mount is designed to be mounted vertically on a post using one of four 8-32 (M4) taps on the sides of the device. The rotating portion of the front face features four 4-40 tapped holes spaced for integration of 16 mm cage system assemblies and components, allowing for the rotation of a cage segment. The non-rotating portion of the front face also includes four 4-40 tapped holes spaced for use with 30 mm cage system components. The back of the device features four more 4-40 tapped holes for 16 mm cage system rods, but this portion of the cage remains stationary. A stationary 30 mm cage system can be continued on the back side of the stage using an SP15(/M) 30 mm to 16 mm cage adapter plate, as shown in Figure 1.1. The position of all of these tapped holes can be seen in Figure G1.1.

The stage is driven by the KBD101 brushless DC controller (sold separately below), which provides very precise positioning through the stable closed-loop PID control system (see the PID Tutorial tab for more information). The controller is fully compatible with our Kinesis and XA software packages, allowing for easy integration into an existing system. Please see the Kinesis and XA Software tab for more information.

Power supplies for the K-Cube® controller are sold separately (see below).

DDR25(/M) Mount Specifications
Travel Range 360° Continuous
Maximum Velocity 5.0 Hz (1800 °/s)
Maximum Accelerationa 29.1 Hz/s (10477 °/s2)
Bidirectional Repeatability 60 µrad (0.00344°)
Backlashb None
Encoder Resolution 1.44 x 106 Counts/rev (0.00025 °/Count)
Maximum Moment of Inertia of Load
About Rotation Axisc		 70 kg•mm2
Minimum Motor Holding Torque 1.8 N•cm
Velocity Stability ±2.0% (For Speeds 0.5 - 5.0 Hz)
Max Wobble (Axial) 1790 µrad (0.103°)
Bearing Type Deep Groove Ball Bearing
Limit Switches None
Central Aperture SM05 (0.535"-40) Threaded Bore
Operating Temperature Ranged 5 to 40 °C (41 to 104 °F)
Motor Type Brushless DC Rotary Motor
Cable Length 3.0 m (9.8')
Required Controller KBD101 (Sold Separately Below)
Stage Dimensions (L x W x H) 55.6 mm x 55.6 mm x 28.5 mm
(2.19" x 2.19" x 1.12")
Weight 0.40 kg (0.88 lbs)
  • The acceleration is limited by the peak torque of the stage. Lighter loads will accelerate faster, while heavier loads will accelerate slower.
  • The stage does not suffer from backlash because there is no transmission.
  • Maximum load will vary with the moment of inertia. The estimated maximum load for a 70 kg*mm2 inertial moment is around 0.25 kg.
  • For operation at temperatures outside normal room temerature, the PID parameters may require optimization.
KBD101 K-Cube® Controller Specifications
Motor Output
Drive Connector 15-Pin D-Type, Female
[Motor Phase Outputs; Stage ID Input;
Forward, Reverse Limit Switch
Inputs (+ Common Return);
5 V Encoder Supply]
Motor Drive Current (Peak) 2 A
Pulse Width Modulation Frequency 40 kHz
Control Algorithm 16-Bit Digital PID Servo Loop with Velocity
and Acceleration Feedforward
Position Feedback Incremental Encoder
Encoder Feedback Bandwidth 2.5 MHz/ 10 MCounts/sec
Position Counter 32 Bit
Operating Modes Position, Velocity
Velocity Profile Trapezoidal/S-Curve
Front Panel Controls
Sprung Potentiometer Wheel Bidirectional Velocity Control,
Forward/Reverse Jogging,
or Position Presets
Input Power Requirements
Voltage 14.5 - 15.5 V Regulated DC
Current 2 A (Peak)
General
Housing Dimensions
(W x D x H)		 60 mm x 60 mm x 47 mm
(2.36" x 2.36" x 1.85")
Weight 160 g (5.5 oz)

The cable attached to the DDR25(/M) rotation stage is terminated in a male 15-pin D-type connector. Pin details are given in Table 3.1.

Table 3.1  Specifications
Pin Description Pin Description
1 Quadrature A- 9 Ground
2 Quadrature A+ 10 Motor Phase C (Black)
3 Quadrature B+ 11 Motor Phase A (Red)
4 Quadrature B- 12 Motor Phase B (White)
5 Encoder Index I- 13 +5 V
6 Encoder Index I+ 14 Ground
7 Negative Limit 15 Stage ID
8 Positive Limit -   -

Software

Kinesis Version 1.14.52

XA Version 1.0.0

The Kinesis and XA Software Packages, which include a GUI for control of Thorlabs' motion controllers.

Also Available:

  • Communications Protocol
Software Download
Kinesis Software
Figure 789A  Kinesis GUI Screen

Thorlabs offers two platforms to drive our wide range of motion controllers: our XA software package and our Kinesis software package, which is being phased out. The Kinesis software supports most of Thorlabs' motion control products. The XA software is an improved platform for developers that currently supports some of our most popular motion control products (see the full list of supported products here). The software is undergoing continuous, intensive development and will eventually add support for our entire line of motion control products. The XA software application will be fully supported through the year 2040.

Kinesis Motion Control Software

The Kinesis software features .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 a common software platform, Thorlabs has ensured that users can easily mix and match any of the 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.


Click to Enlarge
Figure 789B  XA GUI for KDC101 Brushed DC Servo Controller

The software package allows 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.

XA Motion Control Software: Improved Platform for Developers

Designed from the ground up to be straightforward to understand, XA provides a thread-safe and language-paradigm-agnostic set of application programming interfaces in C, C++, and C#/.NET with language wrappers available to allow for easy integration into your native, .NET language, Python, or LabVIEW applications. This enables the same functionality as mentioned for the Kinesis software development kit (SDK) while providing a more streamlined toolkit for developers. Coupled with the included developer guides and code examples in the SDK, this software is tailored toward users interested in creating complex, customized applications and interfaces. Full API documentation is provided for the native C library, and the .NET wrapper documentation is currently under development. Please contact Tech Support for more details on using the .NET wrapper.

XA also features a comparable GUI to Kinesis while adding improvements to the user experience, like the ability to save device states and a more consistent interface across devices of different types. In addition, further improvements are planned as XA will be fully supported through the year 2040, whereas the Kinesis software is being phased out. The current version of the XA software can only drive select Thorlabs motion controllers. However, the software is undergoing continuous, intensive development and will eventually add support for our entire line of motion control products. Information on software compatibility can be found in the XA User Guide, and additional details about the software, including a list of compatible devices, can be found here.

Thorlabs' Kinesis® software features new .NET controls which can be used by third-party developers working in the latest C#, Visual Basic, LabVIEW™, or any .NET compatible languages to create custom applications.

C#
This programming language is designed to allow multiple programming paradigms, or languages, to be used, thus allowing for complex problems to be solved in an easy or efficient manner. It encompasses typing, imperative, declarative, functional, generic, object-oriented, and component-oriented programming. By providing functionality with this common software platform, Thorlabs has ensured that users can easily mix and match any of the 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 the low-powered, single-axis to the high-powered, multi-axis systems and control all from a single, PC-based unified software interface.

The Kinesis System Software allows two methods of usage: graphical user interface (GUI) utilities for direct interaction 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.

For a collection of example projects that can be compiled and run to demonstrate the different ways in which developers can build on the Kinesis motion control libraries, click on the links below. Please note that a separate integrated development environment (IDE) (e.g., Microsoft Visual Studio) will be required to execute the Quick Start examples. The C# example projects can be executed using the included .NET controls in the Kinesis software package (see the Kinesis Software tab for details).

C Sharp Icon Click Here for the Kinesis with C# Quick Start Guide
Click Here for C# Example Projects
Click Here for Quick Start Device Control Examples		 C Sharp Icon

LabVIEW
LabVIEW can be used to communicate with any Kinesis-based controller via .NET controls. In LabVIEW, you build a user interface, known as a front panel, with a set of tools and objects and then add code using graphical representations of functions to control the front panel objects. The LabVIEW tutorial, provided below, provides some information on using the .NET controls to create control GUIs for Kinesis-driven devices within LabVIEW. It includes an overview with basic information about using controllers in LabVIEW and explains the setup procedure that needs to be completed before using a LabVIEW GUI to operate a device.

Labview Icon Click Here to View the LabVIEW Guide
Click Here to View the Kinesis with LabVIEW Overview Page		 Labview Icon

PID Basics

The PID circuit is often utilized as a control loop feedback controller and is commonly used for many forms of servo circuits. The letters making up the acronym PID correspond to Proportional (P), Integral (I), and Derivative (D), which represents the three control settings of a PID circuit. The purpose of any servo circuit is to hold the system at a predetermined value (set point) for long periods of time. The PID circuit actively controls the system so as to hold it at the set point by generating an error signal that is essentially the difference between the set point and the current value. The three controls relate to the time-dependent error signal. At its simplest, this can be thought of as follows: Proportional is dependent upon the present error, Integral is dependent upon the accumulation of past error, and Derivative is the prediction of future error. The results of each of the controls are then fed into a weighted sum, which then adjusts the output of the circuit, u(t). This output is fed into a control device, its value is fed back into the circuit, and the process is allowed to actively stabilize the circuit’s output to reach and hold at the set point value. The block diagram below illustrates the action of a PID circuit. One or more of the controls can be utilized in any servo circuit depending on system demand and requirement (i.e., P, I, PI, PD, or PID).

PID Diagram

Through proper setting of the controls in a PID circuit, relatively quick response with minimal overshoot (passing the set point value) and ringing (oscillation about the set point value) can be achieved. Let’s take as an example a temperature servo, such as that for temperature stabilization of a laser diode. The PID circuit will ultimately servo the current to a Thermoelectric Cooler (TEC) (often times through control of the gate voltage on an FET). Under this example, the current is referred to as the Manipulated Variable (MV). A thermistor is used to monitor the temperature of the laser diode, and the voltage over the thermistor is used as the Process Variable (PV). The Set Point (SP) voltage is set to correspond to the desired temperature. The error signal, e(t), is then the difference between the SP and PV. A PID controller will generate the error signal and then change the MV to reach the desired result. For example, if e(t) states that the laser diode is too hot, the circuit will allow more current to flow through the TEC (proportional control). Since proportional control is proportional to e(t), it may not cool the laser diode quickly enough. In that event, the circuit will further increase the amount of current through the TEC (integral control) by looking at the previous errors and adjusting the output to reach the desired value. As the SP is reached (e(t) approaches zero), the circuit will decrease the current through the TEC in anticipation of reaching the SP (derivative control).

Please note that a PID circuit will not guarantee optimal control. Improper setting of the PID controls can cause the circuit to oscillate significantly and lead to instability in control. It is up to the user to properly adjust the PID gains to ensure proper performance.

PID Theory

The output of the PID control circuit, u(t), is given as

Equation 1

where
Kp= Proportional Gain
Ki = Integral Gain
Kd = Derivative Gain
e(t) = SP - PV(t)

From here we can define the control units through their mathematical definition and discuss each in a little more detail. Proportional control is proportional to the error signal; as such, it is a direct response to the error signal generated by the circuit:

Equation 2

Larger proportional gain results in larger changes in response to the error, and thus affects the speed at which the controller can respond to changes in the system. While a high proportional gain can cause a circuit to respond swiftly, too high a value can cause oscillations about the SP value. Too low a value and the circuit cannot efficiently respond to changes in the system.

Integral control goes a step further than proportional gain, as it is proportional to not just the magnitude of the error signal but also the duration of the error.

Equation 3

Integral control is highly effective at increasing the response time of a circuit along with eliminating the steady-state error associated with purely proportional control. In essence integral control sums over the previous error, which was not corrected, and then multiplies that error by Ki to produce the integral response. Thus, for even small sustained error, a large aggregated integral response can be realized. However, due to the fast response of integral control, high gain values can cause significant overshoot of the SP value and lead to oscillation and instability. Too low, and the circuit will be significantly slower in responding to changes in the system.

Derivative control attempts to reduce the overshoot and ringing potential from proportional and integral control. It determines how quickly the circuit is changing over time (by looking at the derivative of the error signal) and multiplies it by Kd to produce the derivative response.

Equation 4

Unlike proportional and integral control, derivative control will slow the response of the circuit. In doing so, it is able to partially compensate for the overshoot as well as damp out any oscillations caused by integral and proportional control. High gain values cause the circuit to respond very slowly and can leave one susceptible to noise and high frequency oscillation (as the circuit becomes too slow to respond quickly). Too low and the circuit is prone to overshooting the SP value. However, in some cases overshooting the SP value by any significant amount must be avoided and thus a higher derivative gain (along with lower proportional gain) can be used. The chart below explains the effects of increasing the gain of any one of the parameters independently.

Parameter Increased Rise Time Overshoot Settling Time Steady-State Error Stability
Kp Decrease Increase Small Change Decrease Degrade
Ki Decrease Increase Increase Decrease Significantly Degrade
Kd Minor Decrease Minor Decrease Minor Decrease No Effect Improve (for small Kd)

Tuning

In general the gains of P, I, and D will need to be adjusted by the user in order to best servo the system. While there is not a static set of rules for what the values should be for any specific system, following the general procedures should help in tuning a circuit to match one’s system and environment. A PID circuit will typically overshoot the SP value slightly and then quickly damp out to reach the SP value.

Manual tuning of the gain settings is the simplest method for setting the PID controls. However, this procedure is done actively (the PID controller turned on and properly attached to the system) and requires some amount of experience to fully integrate. To tune your PID controller manually, first the integral and derivative gains are set to zero. Increase the proportional gain until you observe oscillation in the output. Your proportional gain should then be set to roughly half this value. After the proportional gain is set, increase the integral gain until any offset is corrected for on a time scale appropriate for your system. If you increase this gain too much, you will observe significant overshoot of the SP value and instability in the circuit. Once the integral gain is set, the derivative gain can then be increased. Derivative gain will reduce overshoot and damp the system quickly to the SP value. If you increase the derivative gain too much, you will see large overshoot (due to the circuit being too slow to respond). By playing with the gain settings, you can maximize the performance of your PID circuit, resulting in a circuit that quickly responds to changes in the system and effectively damps out oscillation about the SP value.

Control Type Kp Ki Kd
P 0.50 Ku - -
PI 0.45 Ku 1.2 Kp/Pu -
PID 0.60 Ku 2 Kp/Pu KpPu/8

While manual tuning can be very effective at setting a PID circuit for your specific system, it does require some amount of experience and understanding of PID circuits and response. The Ziegler-Nichols method for PID tuning offers a bit more structured guide to setting PID values. Again, you’ll want to set the integral and derivative gain to zero. Increase the proportional gain until the circuit starts to oscillate. We will call this gain level Ku. The oscillation will have a period of Pu. Gains for various control circuits are then given to the right in the chart.

Note that when using the Ziegler-Nichols tuning method with some devices like the DSC1 digital servo controller, the integral and derivative terms must be normalized by the sample rate. To do this, the integral term determined from the table should be divided by the sample rate in Hertz and the derivative term should be multiplied by the sample rate in Hertz.


Posted Comments:
han tong  (posted 2024-12-23 03:31:02.57)
My DDR5M motor is not working properly now, the message the drive shows is: "bus fault", even if I reboot it still doesn't work. I'm sure it's not the drive, because another DDR5M works, replaced the drive, and it works fine.
dnewnham  (posted 2025-01-13 08:55:45.0)
Thank you for your inquiry a member of our team will reach out to you directly to further discuss your issue.
Weijun Yuan  (posted 2024-11-25 18:31:54.25)
Hi, I am just curious about DDR25. When the mount moves to the angle I want, will the position be actively stablised by the PID loop? I am not sure after it reaches the set point, the mount is still powered or the power is off and the mount stays at the set point statically. Thank you! Best, Weijun
spolineni  (posted 2024-12-09 05:23:35.0)
Thank you for your inquiry. The DDR25 mount uses a PID loop to actively stabilize its position, continuously adjusting for precise alignment and correcting any deviations even after reaching the setpoint. I will contact you directly for further assistance.
user  (posted 2024-11-01 11:38:32.487)
Does the trigger system of this motor combined with the KBD101 driver work for triggering at particular angles? The manual says it should but i can only get the KBD101 to output if the stage is in motion on the I/O channels but triggering at set locations does nothing.
tschofield  (posted 2024-11-29 10:38:27.0)
I'm sorry that your having this issue. I've reached out to you directly in order to troubleshoot this problem.
涛 王  (posted 2023-12-25 18:17:38.867)
I purchased two DDR25/M products from your company, both of which have problems. This has caused me a lot of distress. The first product has an issue with resetting, where the rotating table keeps rotating without stopping. I have already sent this product to your company for repair, but it has been a month and it is still not fixed. The second product has recently developed an issue where it displays “MGMSG HW RICHRESPONSE received: Phase initialization failed, motor cannot be enabled” when connected. I really want to know what caused these problems and what measures I should take to prevent them from recurring. After all, every maintenance takes a long time, thank you!
cstroud  (posted 2024-01-15 07:39:58.0)
Thank you for reaching out, I'm sorry to hear about these issues. I will reach out to you directly to discuss troubleshooting options.
Young Soo Yu  (posted 2023-11-29 14:53:22.533)
Is this motorized mount usable in vacuum conditions?
do'neill  (posted 2023-12-01 09:53:43.0)
Response from Daniel at Thorlabs. The DDR25(/M) is not vacuum compatible, the closest stage that would be compatible is probably the PDR1V(/M). I will reach out to you directly to discuss your application.
user  (posted 2022-08-13 16:29:11.46)
The overview says "The mount is designed to be mounted vertically on a post using one of four 8-32 (M4) taps on the sides of the device." Does that mean it will not work if mounted horizontally, or will there be malfunctions?
cwright  (posted 2022-08-15 10:06:30.0)
Response from Charles at Thorlabs: Thank you for your query. There are 4x 4-40 holes on the back of the device which are intended for our cage rods. These can be used to mount the device vertically but weight should not hang from the front of the device.
user  (posted 2022-03-26 17:11:49.38)
It can't find the homing position and keeps turning. I can't use kinesis to control it
cstroud  (posted 2025-02-21 10:56:48.0)
Thanks for reaching out. This issue may be caused by a misaligned readhead, or there could be dirt on the readhead or encoder scale. We have contacted you directly to discuss this further.
Simon Neves  (posted 2022-02-18 11:29:08.173)
We've had a DDR25/M for around 3 years, and everything was working fine until few days ago. Now it can't find the homing position and keeps turning. Do you know how to fix this problem? Thank you
cwright  (posted 2022-02-22 03:29:07.0)
Response from Charles at Thorlabs: Thank you for your query. Often this is caused by a moment load pulling on the front plate. This pulls the readhead away from the encoder and prevents homing. A member of technical support will contact you.
CJ Lim  (posted 2020-10-16 14:47:58.943)
Hi, may I check the dynamic torque range for this DDR25? Thanks! CJ
cwright  (posted 2020-10-21 04:33:57.0)
Response from Charles at Thorlabs:Hello and thank you for your query. Unfortunately this is not a specification we can currently provide. We will reach out to you directly to see if we can still assist with your application.
Ryan Merrithew  (posted 2020-08-19 12:33:47.933)
Do you have an estimate for the Mean Time Between Failures on the mount? I'm interested in an application where my optic will be left spinning for long periods of time.
DJayasuriya  (posted 2020-08-27 09:58:25.0)
Thank you for your inquiry. The mean time failure would depend on couple of different factors. Usually the main factor being the bearings of the unit. We will get in touch with you directly to help with your application.
FONG WAI LOON  (posted 2020-07-12 21:54:57.6)
Do you have a value for the minimum incremental motion?
cwright  (posted 2020-07-17 10:58:49.0)
Response from Charles at Thorlabs: Thank you for your query. Unfortunately we do not specify a value for minimum incremental motion at this time.
Jeff Chen  (posted 2020-06-18 20:52:52.533)
Hi, The stage sometimes took about 15 minutes to find the home position. How to solve this issue?
DJayasuriya  (posted 2020-06-22 04:36:45.0)
Thank you for your inquiry. We will get in touch with you directly to get this resolved.
Scott Snider  (posted 2020-01-08 18:10:49.38)
This STEP file has errors in it. Doesn't import properly to NX12
AManickavasagam  (posted 2020-01-29 03:49:24.0)
Response from Arunthathi at Thorlabs: Thanks for your query. We have double checked the STEP file and looks like there are no errors and would most likely be to do with compatibility issues when trying to import to NX12. Looks like STEP files can be opened directly in NX12 just using the File→Open command and changing the “Files of type” filter: Select File→Import→STEP203, STEP214, or STEP242. I have also contacted you directly with the file types that could work.
Emmanuel Mazy  (posted 2019-10-23 05:25:19.853)
What is the accuracy of the homing of the rotation stage ?
cwright  (posted 2019-10-23 09:17:17.0)
Hello Emmanuel, thank you for contacting us. Unfortunately at this time we are not in a position to supply this specification but we are looking into providing it in due course. I will contact you directly to discuss your needs in more detail.
moran5  (posted 2019-02-21 20:27:03.613)
I see the velocity stability is spec'ed at ± 2° for speeds between 0.5-5Hz. How about slower speeds? For example can this stage run at slower speeds, like 10°/sec (0.0277Hz)? If so what might be its stability? I assume it is good at you mention a PID control loop and an encoder. What say you?
rmiron  (posted 2019-02-28 05:51:19.0)
Response from Radu at Thorlabs: Hello, Moran. From Kinesis, the minimum angular velocity that can be commanded is 0.01°/sec (~28μHz). Upon receiving such a command, the stage will rotate at an average of 0.01°/sec, but its velocity stability will be poor. Using low-level serial commands, you can order the stage to move at ~0.134 arcsecs/s (~103.5nHz). However, it is unlikely that the stage would move at all upon receiving such a command. We specify a 0.5-5Hz range because that is the range for which we can guarantee that the instantaneous velocity will consistently be within +/-2% of the demanded value. At 10°/sec we can no longer guarantee that, but we expect the instantaneous velocity to still be within +/-2% most of the time. Generally speaking, the lower the velocity, the poorer its stability. On a different note, you could try to improve velocity stability at lower speeds by decreasing the proportional gain or by increasing the derivative gain (at the expense of taking a longer time to reach target velocity).
simon.neves  (posted 2018-10-18 11:21:39.893)
Can we integrate a mounted 0.5" zero-order HWP in this system ? I see that the real size of such a wave plate is 1", because of the mount. Could we think of an unmounted version that could be integrated in this motor ? Thank you very much
rmiron  (posted 2018-10-19 10:49:53.0)
Response from Radu at Thorlabs: Hello Simon. If your HWP has a total diameter of 1", then you cannot mount it directly. However, given our range of products, it is certainly possible to mount it with the aid of some adapters. I will contact you via email in order discuss what adapters would be necessary in your case.
a.brash  (posted 2018-10-04 16:11:21.837)
Do you have a value for the minimum incremental motion?
rmiron  (posted 2018-10-05 05:18:47.0)
Response from Radu at Thorlabs: Unfortunately, we don't have this specification at the moment. We are aware that it is an important parameter when deciding whether to purchase a rotation stage. Consequently, we are working on addressing this lack of information and the specification should be on the website shortly. I will contact you directly in order to provide more details.
thomas.mattes  (posted 2016-11-21 10:07:24.52)
is a product like this with similar high rotation speed is available for bigger optical Diameters about 30 mm? Best Regards Thomas Mattes
bwood  (posted 2016-11-22 06:59:16.0)
Response from Ben at Thorlabs: Thank you for your question. The DRR100 is a comparable rotation mount, which offers similar speeds (3Hz) with a SM1 threaded central aperture. This is the largest optic diameter, high speed mount we can offer, and it can be found on our website here: https://www.thorlabs.de/newgrouppage9.cfm?objectgroup_id=8184
user  (posted 2016-06-27 04:14:53.113)
In addition to the wobble, do you have the eccentricity error in micrometer? Thanks.
tfrisch  (posted 2016-07-01 03:23:18.0)
Hello, The radial run out is 12um.

Rotation Mount and Stage Selection Guide

Thorlabs offers a wide variety of manual and motorized rotation mounts and stages. Rotation mounts are designed with an inner bore to mount a Ø1/2", Ø1", or Ø2" optic, while rotation stages are designed with mounting taps to attach a variety of components or systems. Motorized options are powered by a DC Servo motor, 2 phase stepper motor, piezo inertia motor, or an Elliptec™ resonant piezo motor. Each offers 360° of continuous rotation.

Manual Rotation Mounts

Rotation Mounts for Ø1/2" Optics
Item # MRM05(/M) RSP05(/M) CRM05 PRM05(/M)a SRM05 KS05RS CT104
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to Enlarge
Features Mini Series Standard External SM1
(1.035"-40) Threads		 Micrometer 16 mm Cage-Compatible ±4° Kinematic Tip/Tilt Adjustment Plus Rotation Compatible with 30 mm Cage Translation Stages and 1/4" Translation Stagesb
Additional Details
  • This mount is available in the PRM05GL5 bundle, which includes the PRM05 rotation mount with the SM05PM5 polarizing prism mount.
  • The CT104 is complatible with the 1/4" translation stages using our MS103(/M) adapter plate.
  • The CT104 is compatible with the CT1B(/M) cage translation stage, which is designed for use with 30 mm cage systems.

Rotation Mounts for Ø1" Optics
Item # RSP1(/M) LRM1 RSP1D(/M) DLM1(/M) CLR1(/M) RSP1X15(/M) RSP1X225(/M) PRM1(/M)a
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to Enlarge		 LRM1
Features Standard External SM1
(1.035"-40) Threads		 Adjustable Zero Two Independently Rotating Carriages Rotates Optic Within
Fixed Lens Tube System		 Continuous 360° Rotation
or 15° Increments		 Continuous 360° Rotation
or 22.5° Increments		 Micrometer
Additional Details
  • This mount is available in the PRM1GL10 bundle, which includes the PRM1 rotation mount with the SM1PM10 polarizing prism mount.

Rotation Mounts for Ø1" Optics
Item # LM1-A &
LM1-B(/M)		 CRM1T(/M) CRM1LT(/M) CRM1PT(/M) KS1RS K6XS
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to Enlarge
Features Optic Carriage Rotates Within Mounting Ring 30 mm Cage-Compatiblea 30 mm Cage-Compatible
for Thick Opticsa		 30 mm Cage-Compatible
with Micrometera		 ±4° Kinematic Tip/Tilt Adjustment Plus Rotation Six-Axis
Kinematic Mounta
Additional Details
  • This mount also features four 4-40 (M3) holes on the rotation dial for use with the K6A1(/M) prism platform.

Rotation Mounts for Ø2" Optics
Item # RSP2(/M) RSP2D(/M) PRM2(/M) LM2-A &
LM2-B(/M)		 LCRM2A(/M) KS2RS K6X2
Click Photo to Enlarge
Features Standard Adjustable
Zero		 Micrometer Optic Carriage Rotates Within Mounting Ring 60 mm Cage-Compatible ±4° Kinematic Tip/Tilt Adjustment Plus Rotation Six-Axis Kinematic Mount
Additional Details

Manual Rotation Stages

Manual Rotation Stages
Item # RP005(/M) PR005(/M) MSRP01(/M) RP01(/M) RP03(/M) QRP02(/M)
Click Photo
to Enlarge		 Continuous Rotation Mount
Features Standard Two Hard Stops
Additional Details

Manual Rotation Stages
Item # XRNR1(/M) XRR1(/M) PR01(/M) CR1(/M) XYR1(/M) OCT-XYR1(/M)
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to Enlarge
Features Fine Rotation Adjuster and
2" Wide Dovetail Quick Connect		 Fine Rotation Adjuster and
3" Wide Dovetail Quick Connect		 Fine Rotation Adjuster and
SM1-Threaded Central Aperture		 Fine Pitch Worm Gear Rotation and 1/2" Linear XY Translation
Additional Details
  • The stage profile is higher when it is mounted using the screw slots rather than stacked on another stage or accessory with mating dovetails.
  • The OCT-XYR1(/M) stage includes the XYR1A solid sample plate. This plate can be detached from the stage to reveal the same mounting features present on the XYR1(/M) stage.

Motorized Rotation Mounts and Stages

Motorized Rotation Mounts and Stages with Central Clear Apertures
Item # DDR25(/M) PDR1C(/M) PDR1(/M) PDR1V(/M) PDXR1(/M)
Click Photo
to Enlarge		 DDR25 PDR1C PDR1 PDR1V PDXR1
Features Compatible with
SM05 Lens Tubes,
16 mm Cage System, &
30 mm Cage System		 Compatible with
16 mm Cage System		 Compatible with
SM05 Lens Tubes &
30 mm Cage System		 Vacuum-Compatible;
Also Compatible with
SM05 Lens Tubes &
30 mm Cage System		 Compatible with
SM05 Lens Tubes &
30 mm Cage System
Additional Details

Motorized Rotation Mounts and Stages with Central Clear Apertures
Item # K10CR1(/M) PRM1Z8(/M)a DDR100(/M) ELL16 ELL14 ELL21(/M) HDR50(/M)
Click Photo
to Enlarge		 ELL16 ELL14 ELL21
Features Compatible with SM1 Lens Tubes & 30 mm Cage System Compatible with
SM1 Lens Tubes,
16 mm Cage System,
30 mm Cage System		 Compatible with
SM05 Lens Tubes,
Open Frame Design for
OEM Applications		 Compatible with
SM1 Lens Tubes,
Open Frame Design for
OEM Applications		 Compatible with
SM2 Lens Tubes,
Open Frame Design for
OEM Applications		 Compatible with
SM2 Lens Tubes
Additional Details
  • This stage is available in the KPRMTE(/M), which includes the PRMTZ8(/M) Motorized Rotation Stage with the KDC101 K-Cube® DC Servo Motor Controller.
Motorized Rotation Mounts and Stages with Tapped Platforms
Item # PRMTZ8(/M)a ELL18(/M)b
Click Photo
to Enlarge
Features Tapped Mounting Platform for Mounting Prisms or Other Optics Tapped Mounting Platform, Open Frame Design for OEM Applications
Additional Details
  • This stage is available in the KPRM1E(/M), which includes the PRMT1Z8(/M) Motorized Rotation Stage with the KDC101 K-Cube DC Servo Motor Controller.
  • This stage is available in the ELL18K(/M), which includes an interface board, mounting brackets, and connectors for PC control.

Compact Direct Drive Rotation Mount


Click to Enlarge
Figure G1.1  Diagram Showing the Dimensions of the DDR25(/M) Rotation Stage and the Position of Tapped Holes for Cage System Rods
  • Rotational Speeds up to 5.0 Hz (1800 °/s)
  • Integrated Brushless DC Servo Motor
  • SM05 (0.535"-40) Threaded Bore for Ø1/2" Lens Tubes
  • 16 mm and 30 mm Cage System Compatible
  • Four 8-32 (M4) Mounting Holes
  • Driver Not Included (See Below)

Characterized by high-speed rotation and high-positional accuracy, the DDR25(/M) mount is well-suited for applications where there is a need to rotate components at high speed within a cage or other system. This mount is driven by the KBD101 brushless DC controller (sold separately below), which provides precise positioning through the stable closed-loop PID control system.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
DDR25 Support Documentation
DDR25Compact Direct Drive Rotation Mount, SM05-Threaded Bore, 8-32 Taps
$2,248.07
Today
+1 Qty Docs Part Number - Metric Price Available
DDR25/M Support Documentation
DDR25/MCompact Direct Drive Rotation Mount, SM05-Threaded Bore, M4 Taps
$2,248.07
Today

K-Cube® Brushless DC Servo Driver

photo of power supply adapters
Click to Enlarge
Figure 495A  KCH601 USB Controller Hub (Sold Separately) with Installed K-Cube and T-Cube™ Modules (T-Cubes shown on the KAP101 Adapter)
  • Front Panel Velocity Wheel and Digital Display for Controlling Motorized Stages or Actuators
  • Two Bidirectional SMC Trigger Ports to Read or Control External Equipment
  • Interfaces with Computer Using Included USB Cable
  • Fully Compatible with Kinesis and XA Software Packages
  • Compact Footprint: 60.0 mm x 60.0 mm x 49.2 mm (2.42" x 2.42" x 1.94")
  • Power Supply Not Included (See Below)

Thorlabs' KBD101 K-Cube® Brushless DC Motor Controller provides local and computerized control of a single motor axis. It features a top-mounted control panel with a velocity wheel that supports four-speed bidirectional control with forward and reverse jogging as well as position presets. A backlit digital display is also included that can have the backlit dimmed or turned off using the the top-panel menu options. The front of the unit contains two bidirectional SMC trigger ports that can be used to read a 5 V external logic signal or output a 5 V logic signal to control external equipment. Each port can be independently configured.

The KBD101 controller is fully compatible with our Kinesis and XA software packages, but not all motion control devices are supported by XA at this time. A full list of supported devices can be found here. Please see the Kinesis and XA Software tab for more information.

Please note that this controller does not ship with a power supply. Compatible power supplies are listed below. Additional information can be found on the main KBD101 Brushless DC Servo Motor Controller page.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
KBD101 Support Documentation
KBD101K-Cube Brushless DC Servo Driver (Power Supply Not Included)
$965.42
Today

Compatible Power Supplies

photo of power supply adapters
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Figure 780B  Each KPS201 power supply includes one region-specific adapter, which can be selected upon checkout.
photo of power supply options
Click to Enlarge
Figure 780A  The KPS201 Power Supply Unit
  • Individual Power Supply
    • KPS201: For K-Cubes® or T-Cubes™ with 3.5 mm Jacks
  • USB Controller Hubs Provide Power and Communications
    • KCH301: For Up to Three K-Cubes or T-Cubes
    • KCH601: For Up to Six K-Cubes or T-Cubes

The KPS201 power supply outputs +15 VDC at up to 2.66 A and can power a single K-Cube or T-Cube with a 3.5 mm jack. It plugs into a standard wall outlet.

The KCH301 and KCH601 USB Controller Hubs each consist of two parts: the hub, which can support up to three (KCH301) or six (KCH601) K-Cubes or T-Cubes, and a power supply that plugs into a standard wall outlet. The hub draws a maximum current of 10 A; please verify that the cubes being used do not require a total current of more than 10 A. In addition, the hub provides USB connectivity to any docked K-Cube or T-Cube through a single USB connection.

For more information on the USB Controller Hubs, see the full web presentation.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
KPS201 Support Documentation
KPS20115 V, 2.66 A Power Supply Unit with 3.5 mm Jack Connector for One K- or T-Cube
$43.15
Today
KCH301 Support Documentation
KCH301USB Controller Hub and Power Supply for Three K-Cubes or T-Cubes
$640.53
Today
KCH601 Support Documentation
KCH601USB Controller Hub and Power Supply for Six K-Cubes or T-Cubes
$775.24
Lead Time
Additional Rotation Mounts
  • Manual Rotation Mounts

  • Nested Mounts

  • Precision Rotation Mounts

  • 16 mm Cage System Rotation Mount

  • 30 mm Cage System Rotation Mounts

  • 60 mm Cage System Rotation Mounts

  • Kinematic Rotation Mounts

  • 6-Axis Kinematic Mounts

  • Compact Rotation Mount:Direct Drive

  • Rotation Mount/Stage:DC Servo Motor

  • Rotation Mount/Stage:Stepper Motor

  • Compact Rotation Mount/Stages: Piezo Inertia Drive

  • Resonant Motor Driven Stages & Mounts

  • XY Stages with Rotation

  • Manual Rotation Stages

  • Motorized Rotation Stages & Mounts