Motorized Precision Rotation Stage with DC Servo Motor

Overview
Specs
Pin Diagram
Motion Control Software
Vernier Scales
Feedback
Rotation Mounts and Stages

Key Specifications^a
Platform Size	Ø66.2 mm (2.61")
Platform Mounting Holes	Eight 6-32 (M4) Sixteen 8-32 (M4) Five 1/4"-20 (M6)
Bidirectional Repeatability	±0.1°
Backlash	±0.3°
Max Rotation Velocity	25 deg/sec
Horizontal On-Axis Load Capacity^b	15 N (1.5 kg, 3.4 lbs)
Repeatable Incremental Motion (Min)	0.04°
Percentage Accuracy	0.1%
Home Location Accuracy	±0.2°
Range	360° Continuous

See the Specs tab for complete specifications.
The PRMTZ8 is not suitable for mounting vertically.

Features

25 deg/sec Rotation Velocity
Mounting Holes for Prism Clamps (Sold Below) or Other Optomechanics
1° Graduations on Main Dial
Compact Design is Only 25 mm Tall
Home Limit Switch For Precise 0° Locating within ±0.2°
Recommended Driver: KDC101 DC Servo Controller

The PRMTZ8 is a compact, DC servo motorized 360° rotation stage with a tapped platform. The user can measure the angular displacement of the platform by using the Vernier scale (5 arcmin resolution) in conjunction with the graduation marks that are marked on the rotating platform in 1° increments. This rotation stage is also equipped with a home limit switch to facilitate automated rotation to the precise 0° position, allowing absolute angular positioning thereafter. The limit switch is designed to allow continuous rotation of the stage over multiple 360° cycles.

The KDC101 DC Servo Controller, sold separately below, is the ideal companion for achieving smooth, continuous motion that can be automated via the software interface. The stage, controller, and KPS101 power supply are sold together as the Item #s KPRMTE and KPRMTE/M.

The PRMTZ8 is supplied with 430 mm (16.93") of cable. An 2.5 m (8 ft) extension cable (PAA632) is available separately.

Motor Specifications
Motor Type	DC Servo
Nominal Voltage	6 V
No Load Speed	6560 rpm
No Load Current	7.43 mA
Nominal Speed	1050 rpm
Nominal Torque (Maximum Continuous Torque)	1.26 mN•m
Nominal Current (Maximum Continuous Current)	0.156 A
Stall Torque	1.54 mN•m
Starting Current	0.184 A
Maximum Efficiency	65%
Terminal Resistance	32.7 Ω
Terminal Inductance	0.607 mH
Torque Constant	8.38 mN•m/A
Speed Constant	1140 rpm/V
Speed / Torque Gradient	4450 rpm/mN•m
Mechanical Time Constant	13.9 ms
Rotor Inertia	0.298 g•cm²

Stage Specifications
Translation and Motion Parameters
Travel Range	360° Continuous
Bidirectional Repeatability^a	±0.1°
Backlash^b	±0.3°
Max Rotation Velocity	25 deg/s
Calculated Resolution	2 arcsec (0.0005°)
Horizontal On-Axis Load Capacity^c	15 N (1.5 kg, 3.4 lbs)
Min Repeatable Incremental Motion^d	0.04°
Percentage Accuracy	0.1%
Home Location Accuracy	±0.2°
Wobble	200 µrad
Physical
Platform Size	Ø66.2 mm (2.61")
Platform Mounting Holes	Eight 6-32 (M4) Sixteen 8-32 (M4) Five 1/4"-20 (M6)
Dimensions	137.4 mm x 73.3 mm x 25 mm (5.41" x 2.88" x 0.98")
Weight	0.38 kg (0.84 lbs)
Cable Length	430 mm (16.93")

The average of the repeatability when a set position is approached from both directions.
When a stage is moved to a position and then returned to its original position, some motion is lost due to the lead screw mechanism. This loss is known as backlash.
The PRMTZ8 is not suitable for mounting vertically.
The minimum incremental motion that the stage can repeatedly achieve within its standard error.

Motor Connector Pin Out

The PRMTZ8 is supplied with 430 mm (16.93") of cable. A 2.5 m (8 ft) extension cable (PAA632) is available separately.

Pin	Description	Pin	Description
1	Ground/Return	9	Ident Resistor^a
2	Reserved For Future Use	10	V_cc/Ident Resistor
3	Limit Switch	11	Encoder Channel B
4	Reserved For Future Use	12	Reserved For Future Use
5	Motor (+)	13	Encoder Channel A
6	Reserved For Future Use	14	Ident EEPROM
7	Motor (-)	15	Ident EEPROM
8	Reserved For Future Use	-	-

Used to identify the stage when it is connected to a Thorlabs controller.

D-Type Male

Schematic

Thorlabs offers two platforms to drive our wide range of motion controllers: our Kinesis^® software package or the legacy APT™ (Advanced Positioning Technology) software package. Either package can be used to control devices in the 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).

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.

Kinesis GUI Screen

APT GUI Screen

Our legacy APT System Software platform offers 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.

By providing these common software platforms, Thorlabs has ensured that users can easily mix and match any of the Kinesis and APT 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 is 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.

Software

Kinesis Version 1.14.23

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

Also Available:

Communications Protocol

Software

APT Version 3.21.4

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

Also Available:

Communications Protocol

Click to Enlarge
Figure 1: An example of how to read a vernier scale. The red arrow indicates what is known as the pointer. Since the tick mark labeled 10 on the vernier scale aligns with one of the tick marks on the main scale, this vernier scale is reading 75.60 (in whatever units the tool measures).

Reading a Vernier Scale

Vernier scales are typically used to add precision to standard, evenly divided scales (such as the scale on Thorlabs' rotation mounts). A vernier scale has found common use in many precision measurement tools, the most common being calipers and micrometers. The direct vernier scale uses two scales side-by-side: the main scale and the vernier scale. The vernier scale has a slightly smaller spacing between its tick marks (10% smaller than the main). Hence, the lines on the main scale will not line up with all the lines on the vernier scale. Only one line from the vernier scale will match well with one line of the main scale, and that is the trick to reading a vernier scale.

Figures 1 through 3 show a vernier scale system for three different situations. In each case, the scale on the left is the main scale, while the small scale on the right is the vernier scale. When reading a vernier scale, the main scale is used for the gross number, and the vernier scale gives the precision value. In this manner, a standard ruler or micrometer can become a precision tool.

The 0 on the vernier scale is the "pointer" (marked by a red arrow in Figs. 1 - 3) and will indicate the main scale reading. In Figure 1 we see the pointer is lined up directly with the 75.6 line. Notice that the only other vernier scale tick mark that lines up well with the main scale is 10. Since the vernier 0 lines up with the main scale’s 75.6, the reading from Figure 1 is 75.60 (in whatever units the tool measures in).

That is essentially all there is to reading a vernier scale. It's a very straightforward way of increasing the precision of a measurement tool. To expound, let’s look at Figure 2. Here we see that the pointer is no longer aligned with a scale line, instead it is slightly above 75.6, but below 75.7; thus the gross measurement is 75.6. The first vernier line that coincides with a main scale line is the 5, shown with a blue arrow. The vernier scale gives the final digit of precision; since the 5 is aligned to the main scale, the precision measurement for Figure 2 is 75.65.

Since the vernier scale is 10% smaller than the main scale, moving 1/10 of the main scale will align the next vernier marking. This asks the obvious question: what if the measurement is within the 1/10 precision of the vernier scale? Figure 3 shows just this. Again, the pointer line is in between 75.6 and 75.7, yielding the gross measurement of 75.6. If we look closely, we see that the vernier 7 (marked with a blue arrow) is very closely aligned to the main scale, giving a precision measurement of 75.67. However, the vernier 7 is very slightly above the main scale mark, and we can see that the vernier 8 (directly above 7) is slightly below its corresponding main scale mark. Hence, the scale on Figure 3 could be read as 75.673 ± 0.002. A reading error of about 0.002 would be appropriate for this tool.

As we've seen here, vernier scales add precision to a standard scale measurement. While it takes a bit of getting used to, with a little practice, reading these scales is fairly straightforward. All vernier scales, direct or retrograde, are read in the same fashion.

Click to Enlarge
Figure 2: An Example of a vernier scale. The red arrow indicates the pointer and the blue arrow indicates the vernier line that matches the main scale. This scale reads 75.65.

Click to Enlarge
Figure 3: An Example of a vernier scale. The red arrow indicates the pointer and the blue arrow indicates the vernier line that matches the main scale. This scale reads 75.67, but can be accurately read as 75.673 ± 0.002.

Posted Comments:

Sudhan Bhadade (posted 2019-08-08 06:51:39.933)

Hello, I am using the KDC101 cube with .NET in Labview. I have established a connection with the Kinesis interface using the .dll files. When I attempt to connect to the cube, I receive an error saying "No suitable devices found." When I use the Kinesis app, I can connect with the cube and use all the functions to power a rotational stage, but it fails to connect to my Labview VI. Can I please get some help with this?

rmiron (posted 2019-08-08 10:37:24.0)

Response from Radu at Thorlabs: Hello Sudhan. Have you set the SerialNumber property node before attempting to connect? If so, have you made sure to use KDC101's serial number?(as opposed to the stage's) Unfortunately, it sometimes (rarely) happens that the number printed on the cube is different from the one programmed into the unit. That is why it might be worth checking what serial number is shown by Kinesis. I will contact you directly in case these questions are not helpful.

paulbertier7 (posted 2018-04-13 14:20:09.58)

Hello, What is the minimum angle step? Cheers, Paul

bhallewell (posted 2018-04-20 09:19:03.0)

Response from Ben at Thorlabs: Thank you for your feedback, Paul. We state a Minimum Repeatable Incremental Motion of 0.04 degrees in the specs table.

maheshswami (posted 2018-02-15 02:02:56.527)

Does it have a through hole/clear axis if the tapped platform is removed.

bhallewell (posted 2018-02-21 03:42:21.0)

Response from Ben at Thorlabs: The top plate is a feature of a single moving world assembly & so you can't remove the top plate & use the stage. This stage is designed as a rotation stage as opposed to an optics rotator. For a through hole option, I'd recommend taking a look at our PRM1Z8. https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_ID=2875 Our K10CR1 stepper actuated optics rotator with integrated controller may also be of interest to you. https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_ID=8750&pn=K10CR1

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
Click Photo 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 CT1 Cage Translator Stage and 1/4" Translation Stages^b
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 CT1 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
Click Photo to Enlarge
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)	CRM1(/M)	CRM1L(/M)	CRM1P	KS1RS	K6XS
Click Photo to Enlarge
Features	Optic Carriage Rotates Within Mounting Ring	30 mm Cage-Compatible^a	30 mm Cage-Compatible for Thick Optics^a	30 mm Cage-Compatible with Micrometer^a	±4° Kinematic Tip/Tilt Adjustment Plus Rotation	Six-Axis Kinematic Mount^a
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)	LCRM2(/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
Features	Standard					Two Hard Stops
Additional Details

Manual Rotation Stages
Item #	XRR1(/M)	PR01(/M)	CR1(/M)	XYR1(/M)	OCT-XYR1(/M)
Click Photo to Enlarge
Features	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 3" 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)	PDR1(/M)	K10CR1(/M)	PRM1Z8(/M)^a	DDR100(/M)	ELL14	HDR50(/M)
Click Photo to Enlarge
Features	Compatible with SM05 Lens Tubes, 16 mm Cage System, 30 mm Cage System	Compatible with SM05 Lens Tubes, 30 mm Cage System, PD1(/M) Linear Stages	Compatible with SM1 Lens Tubes & 30 mm Cage System		Compatible with SM1 Lens Tubes, 16 mm Cage System, 30 mm Cage System	Compatible with SM1 Lens Tubes, Open Frame Design for OEM Applications	Compatible with SM2 Lens Tubes
Additional Details

Motor Type	Brushless DC Servo	Piezo Inertia Drive	2 Phase Stepper Motor with Worm Gear	DC Servo	Brushless DC Servo	Piezo Resonant Motor	2 Phase Stepper Motor with Worm Gear
Rotation Adjustment Range	360° Continuous
Rotating Platform/Carriage
Diameter	Ø1.14" (Ø29.0 mm)	1.34" (34.0 mm)	Ø1.81" (Ø46.0 mm)	Ø1.97" (Ø50.0 mm)	Ø4.37" (111.0 mm)	-	Ø3.86" (Ø98.0 mm)
Height	1.12" (28.5 mm)	0.71" (18.0 mm)	0.84" (21.5 mm)	0.91" (23.0 mm)	1.57" (39.9 mm)	0.59" (15.1 mm)	1.73" (44.0 mm)
Threaded Mounting Holes	Four 4-40 with 16 mm Spacing	Four 8-32 (M4)	Six 4-40 (M3)	Four 6-32 (M4), Four 8-32 (M4), Four 4-40 with 30 mm Spacing	Eight 8-32 (M4), Four 1/4"-20 (M6), Four 4-40 with 16 mm Spacing, Four 4-40 with 30 mm Spacing	-	Four 8-32 (M4)
Center Aperture	SM05 Internal Threads, 1.2" (28.5 mm) Deep	Ø9.0 mm Clear Aperture with SM05 Internal Threads, 2.5 mm Deep	SM1 Internal Threads, 0.84" (21.5 mm) Deep	SM1 Internal Threads, 0.91" (23.0 mm) Deep	SM1 Internal Threads, 0.82" (21.0 mm) Deep	SM1 Internal Threads, 0.58" (14.7 mm) Deep	Ø50.0 mm Clear Aperture with SM1 Internal Threads, 6.9 mm Deep
Speed (Max)	1800°/s	20°/s	10°/s	25°/s	1080°/s	430°/s	50°/s
Platform Adapter Plate(s)	-	-	K10CR1A2(/M)	PRM1SP1(/M)	NR360SP9(/M) NR360SP4(/M)	-	NR360SP9(/M) NR360SP8 NR360SP4(/M)
Base
Dimensions	2.19" x 2.19" (55.6 mm x 55.6 mm)	1.57" x 1.57" (40.0 mm x 40.0 mm)	4.21" x 2.60" (107.0 mm x 66.0 mm)	5.18" x 3.26" (131.5 mm x 82.8 mm)	4.53" x 4.53" (115 mm x 115 mm)	2.60" x 3.25" (66.0 mm x 82.5 mm)	7.46" x 4.55" (189.4 mm x 115.5 mm)
Stage Adapter Plates	-	-	K10CR1A1 K10CR1A3	PRM1SP2 PRM1SP3	-	-	NR360SP2(/M) NR360SP5(/M)
Bottom Surface Mounting Holes	-	Two 8-32 (M4)	-	Two 1/4" (M6) Counterbores	Four 1/4" (M6) Clearance Holes	-	Four 1/4" (M6) Counterbores
Side Holes for Vertical Mounting	Four 8-32 (M4) Eight 4-40	One 8-32 (M4), Two Sides	Three 8-32 (M4)	Four 8-32 (M4)	Eight 1/4"-20 (M6)	-	Six 1/4"-20 (M6)
Cage System Compatibility	Four 4-40 Holes on Back Side with 16 mm Spacing, Four 4-40 Taps on Front Side with 30 mm Spacing	Ø6 mm Holes for ER Cage Rods with 30 mm Spacing	Four 4-40 Holes on Each Side with 30 mm Spacing	-	Four 4-40 Holes on Back Side with 30 mm Spacing	60 mm Cage using Four 0.12 (3.0 mm) Holes for 4-40 Screws, 30 mm Cage using SR025 Cage Rods to Adapt to ER Cage Rods	-

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.

Motorized Rotation Stage

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PRMTZ8/M Platform Taps

Click to Enlarge
PRMTZ8 Platform Taps

The rotating platform features five 1/4"-20 (M6) tapped holes and sixteen 8-32 (M4) holes for general optomechanics, as well as eight 6-32 (M4) holes for compatibility with our PM3 and PM4 prism clamping arms (available below).

The PRMTZ8 is supplied with 16" (0.4 m) of cable. An 8 ft (2.5 m) extension cable (PAA632) is available separately.

Motorized Rotation Stage and Controller

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Click to Enlarge
The KPRMTE(/M) includes the KPS101 Power Supply with a location-specific power adapter (not shown).

The KPRMTE(/M) bundle includes a PRMTZ8(/M) Motorized Rotation Stage with a KDC101 K-Cube™ DC Servo Motor Controller. This controller provides smooth, continuous motion that can be automated via the software interface. The bundle ships complete with a KPS101 power supply, which includes a location-specific adapter.

The KPRMTE(/M) is supplied with 16" (0.4 m) of cable. An 8 ft (2.5 m) extension cable (PAA632) is available separately.

K-Cube™ DC Servo Motor Controller

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View Product List

Item #	Qty	Description
Product List
KCH601	1	USB Controller Hub and Power Supply for Six K-Cubes or T-Cubes
KDC101	1	K-Cube Brushed DC Servo Motor Controller (Power Supply Not Included)
KST101	1	K-Cube Stepper Motor Controller (Power Supply Not Included)
KPZ101	1	K-Cube Piezo Controller (Power Supply Sold Separately)
TSG001	1	T-Cube Strain Gauge Reader (Power Supply Not Included)
TSC001	1	T-Cube Shutter Controller (Power Supply Not Included)
KAP101	2	Adapter Plate for KCH Series Hubs and 60 mm Wide T-Cubes

KCH601 USB Controller Hub (Sold Separately) with Installed K-Cube and T-Cube™ Modules (T-Cubes Require the KAP101 Adapter)

Front Panel Velocity Wheel and Digital Display for Controlling Motorized Stages or Actuators
Two Bidirectional Trigger Ports to Read or Control External Equipment
Interfaces with Computer Using Included USB Cable
Fully Compatible with Kinesis^® or APT™ 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' KDC101 K-Cube Brushed 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 top-panel menu options. The front of the unit contains two bidirectional 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 unit is fully compatible with our new Kinesis software package and our legacy APT control software. Please see the Motion Control 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 KDC101 DC Servo Motor Controller page.

Compatible Power Supplies

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A location-specific adapter is shipped with the power supply unit based on your location. The adapters for the KPS101 are shown here.

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The KPS101 Power Supply Unit

Individual Power Supply
- KPS101: 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 KPS101 power supply outputs +15 VDC at up to 2.4 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.

Clamping Arms

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Click for Details
Mechanical Drawings

Provide Clamping Force for Our Platform Mounts
Threaded Hole on Top and Threaded Stud on Bottom of Post
- 6-32 Threads on PM3 and PM4
- 8-32 Threads on PM5
- M4 Threads on All Metric Versions
Maximum Optic Heights from 0.97" to 1.65" (24.6 mm to 41.8 mm)
Extension Posts Available to Increase Max Optic Height
- PM3SP(/M) with PM3(/M): Hold Optics up to 2.21" (56.1 mm) Tall
- PM4SP(/M) with PM4(/M): Hold Optics up to 3.61" (91.7 mm) Tall

Click to Enlarge
Clamping Arm Extension Posts with Metric Indicator Groove

Thorlabs' Clamping Arms provide clamping force to secure optics to our kinematic platform mounts, stages, and V-clamps. The PM3(/M) accommodates optics up to 0.97" tall and features a 0.69" center-to-center distance between the post and the nylon-tipped setscrew that holds the optic. The PM4(/M) accommodates optics up to 1.61" and features a 1.16" center-to-center distance between the post and the nylon-tipped setscrew. The maximum optic height of the PM3(/M) or PM4(/M) Clamping Arms can be extended using our PM3SP(/M) or PM4SP(/M) Extension Posts, respectively. These extension posts are identical to the posts included in each complete clamping arm. Each clamping arm features 6-32 (M4) threads. The PM3 and PM4 can be mounted in 8-32 tapped holes by using the AS6E8E thread adapter, which features internal 6-32 threads and external 8-32 threads. This thread adapter has an outer diameter of 0.24", which is the same as the PM4SP extension post and the post included with the PM4 clamping arm. This allows the clamping arm to be adjusted across the seam between either post and the adapter. The smaller diameters of the included post for the PM3 clamping arm and the PM3SP extension post cause the thread adapter to act as a stop for the clamping arm.

The PM5(/M) clamping arm is made entirely from heat-treated stainless steel, which helps maintain stability in fluctuating temperatures and provides vacuum compatibility. This clamping arm is recommended for use with the POLARIS-K1M4(/M), but it can be used with any platform mount or stage that has one or more 8-32 (M4) tapped holes. The PM5(/M) can hold optics up to 1.65" tall, and the distance from the post center to the contact point that holds the optic is 0.90".

Each clamping arm is attached to its post using a flexure mechanism that locks with a 5/64" (2.0 mm) balldriver or hex key. The setscrew on top of the clamping arm also accepts a 5/64" (2.0 mm) balldriver or hex key in order to clamp down on the optic. The post includes a through hole which can be leveraged for added torque when tightening down the post. Please see the diagram above for additional information.

Based on your currency / country selection, your order will ship from Newton, New Jersey

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PM3	Small Adjustable Clamping Arm, 6-32 Threaded Post

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PM3SP Customer Inspired! Extension Post for PM3 Clamping Arm, 6-32 Threaded

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PM4	Large Adjustable Clamping Arm, 6-32 Threaded Post

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PM5	Stainless Steel Adjustable Clamping Arm, 8-32 Threaded Post

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Motorized Precision Rotation Stage with DC Servo Motor

Features

Motor Connector Pin Out

D-Type Male

Software

Software

Reading a Vernier Scale

Rotation Mount and Stage Selection Guide

Manual Rotation Mounts

Manual Rotation Stages

Motorized Rotation Mounts and Stages

Motorized Rotation Stage

Motorized Rotation Stage and Controller

K-Cube™ DC Servo Motor Controller

Compatible Power Supplies

Clamping Arms