2" (50 mm) Motorized Actuators

  • Piezo Inertia or Stepper Actuators with 50 mm of Travel
  • High Load Capacities
  • No Backlash

Application Idea

Three LNR50DD Stages
in XYZ Configuration
with DRV250 Motors


50 mm Travel
Stepper Motor Actuator


50 mm Travel
Piezo Inertia Actuator

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Stepper Motor Actuator with 50 mm Travel

Recommended Controllers
BSC201, BSC202, or BSC203

  • 409,600 Microsteps per Revolution
  • 48 V Output at 25 W
  • Trapezoidal and
    'S-Curve' Velocity Profiles


  • Specifically Designed to be Used with LNR50 TravelMax™ Stages
  • ±1.6 µm Unidirectional Repeatability
  • Maximum Pushing Force: 180 N
  • Preload to Eliminate Backlash
  • Non-Rotating Tip
  • 25 mm Travel Version also Available
Key Specificationsa
Travel Range 50 mm (1.97")
Unidirectional Repeatability ±1.6 µm
Bidirectional Repeatability ±3.9 µm
Maximum Pushing Forceb 180 N
Maximum Velocity 50 mm/s
Maximum Acceleration 50 mm/s2
Limit Switches Hall Effect
Homing Repeatability ±3.6 µm
Feedback Nonec
Motor Type 2-Phase Stepper Motor
Full Step Angle 1.8°
Lead Screw Pitch 1.0 mm
Microsteps per Revolution 409 600
Actuator Mass 0.66 kg
Compatible Controllers BSC201, BSC202, BSC203,
or MST602
  • For complete specifications, see the manual.
  • The unit requires a preload in order to function properly and should be used only for pushing loads. Do not use for pulling.
  • Although feedback is not provided within the actuator, closed-loop control can be achieved by using the LNR502E(/M) stage.
3-Axis Stepper Motors
Click to Enlarge

View Imperial Product List
Item #QtyDescription
LNR50DD350.8 mm TravelMax Stage, Differential Drive, Imperial
DRV250350 mm Trapezoidal Stepper Motor Drive
LNR50P41Base Plate for LNR50 TravelMax Stages, Imperial
LNR50P31XY Adapter Plate for LNR50 TravelMax Stages, Imperial Hole Spacings
LNR50P21Right-Angle Bracket for LNR50 TravelMax Stages, Imperial Threads
View Metric Product List
Item #QtyDescription
LNR50DD/M350.8 mm TravelMax Stage, Differential Drive, Metric
DRV250350 mm Trapezoidal Stepper Motor Drive
LNR50P4/M1Base Plate for LNR50 TravelMax Stages, Metric
LNR50P3/M1XY Adapter Plate for LNR50 TravelMax Stages, Metric Hole Spacings
LNR50P2/M1Right-Angle Bracket for LNR50 TravelMax Stages, Metric Threads
A 3-axis LNR50DD 2" travel stage shown with the manual adjusters replaced by DRV250 actuators.

The DRV250 offers 50 mm (1.97") of travel and a unidirectional repeatability of ±1.6 μm. When used with one of our stepper motor controllers, the DRV250 achieves a theoretical minimum step size of 2.4 nm and a maximum speed of 50 mm/s.

The hybrid stepper motor, with its rotor that consists of 50 individual magnetic teeth, is ideally suited for micro-stepping applications. Aside from the increase in resolution resulting from increasing the steps per revolution from 200 to 409 600, micro-stepping also ensures smoother low-speed motion by allowing the discrete 1.8° step size to be reduced to much smaller steps, resulting in lower vibrational noise.

The DRV250 stepper motor drive is equipped with a trapezoidal screw thread for more efficient high-load operation than is available from a standard threading.

This actuator is compatible with our 2" TravelMax Manual Stages. To use the DRV250 with these stages, mount the motor to the side of the stage using two 40 mm long M4 cap screws (included). In order to secure the TravelMax stage to a table while using the DRV250 actuator, the LNR50P4(/M) base plate is required.

A 500 mm (19.7") cable with a 15-pin D-type connector is attached to the unit to connect the stepper motor to a controller. The unit also comes with a 3 m (9.8 ft) extension cable (item # PAA613). If a shorter cable is needed, the 1 m (3.3 ft) PAA612 cable is available separately.

Pin Diagram

High-Density D-Type Male 15 Pin Connector

15-Pin D-Sub Connector Pin Out

Pin Description Pin Description
1 Limit Grounda 9 Ident (for Future Use)
2 CCW Limit Switch 10 +5 V
3 CW Limit Switch 11 Reserved for Future Use
4 Motor Phase B - 12 Reserved for Future Use
5 Motor Phase B + 13 +5 V
6 Motor Phase A - 14 Reserved for Future Use
7 Motor Phase A + 15 Ground
8 Reserved for Future Use  -  -
  • The limit switch ground wire is connected to the motor body.
Connectors Terminating the Converter Cable
Click to Enlarge

High-Density D-Type Male 15 Pin Connector

Posted Comments:
Peter Hogg  (posted 2021-08-27 13:23:46.94)
I'm a graduate student who is trying to build a custom stage with a controller and parts I already have in the lab. I was wondering the compatibility of this actuator (DRV250) with a controller I already have (Sutter MP 285). I have the pin-out for the Sutter's driver and I am comfortable with creating custom wiring but want to make sure I of compatibility before purchasing anything.
cwright  (posted 2021-09-02 09:25:24.0)
Response from Charles at Thorlabs: Thank you for your query. Unfortunately we are not able to support the use of third party controllers with our actuators and would recommend the use of BSC201 with the DRV250.
wmwu  (posted 2016-02-29 19:00:04.997)
Dear Officer, Is "Stepper Motor Drive (DRV014)" able to connect to the "Translation Stage(PT1A)", and to control its motion? Thanks very much. Best regards, Alan
bwood  (posted 2016-03-01 04:06:43.0)
Response from Ben at Thorlabs: Thank you for your feedback. Unfortunately, the DRV014 is not compatible with the PT1A. Among other reasons, the DRV014 barrel size is too large (Ø12 mm) for the PT1A (Ø9.5 mm). The recommended stage to pair with the DRV014 are the 50 mm TravelMax™ stages, and the recommended actuators for the PT1A can be found under the "Actuator" tab on the PT1 series web page.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
DRV250 Support Documentation
DRV25050 mm Trapezoidal Stepper Motor Drive
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Piezo Inertia Actuator with 50 mm Travel

Required Controller:
KIM001 or KIM101

  • KIM001: Single-Channel Output
  • KIM101: Four Output Channels, Capable of Multi-Channel Operation
  • Standalone Control via Top Panel or PC-Control via USB
  • Voltage Output from 85 V to 125 V
Item # PIA50
Travel 50 mm (1.97")
Typical Step Sizea 20 nm
Maximum Step Sizeb <30 nm
Step Size Adjustabilityc ≤30%
Maximum Step Frequencyd 2000 Hz
Backlash None
Maximum Active Preloade 25 N
Recommended Maximum
Axial Load Capacityf
2.5 kg (5.51 lbs)
Speed (Continuous Stepping)
2 mm/minute (Typical)
<3.5 mm/minute (Maximum)
Drive Screw 1/4"-80 Thread, Hard PVD Coated
Motor Type Piezoelectric Inertia
Mounting Feature Ø3/8" (Ø9.5 mm) Barrel
Operating Temperature 10 to 40 °C (50 to 104 °F)
Dimensions 3.80" x 1.24" x 0.67”
(96.6 mm x 31.5 mm x 17.0 mm)
Cable Length 1.0 m (3.28')
Connector SMC, Female
Required Controllerg KIM001 or KIM101h
  • This value can vary by up to 20% and is not normally repeatable due to component variance, change of direction, and application conditions.
  • This can be adjusted up to 30% in both directions using the controller and Kinesis Software.
  • This can be adjusted using the controller and the Kinesis Software.
  • Using the KIM001 or KIM101 Inertia Piezo Controllers
  • The axial force applied to the drive tip to achieve the specified step size. A minimum of 5 N is recommended to enhance stepping behavior.
  • A higher maximum load is possible but it may decrease the typical step size.
  • Controllers Sold Separately
  • These actuators can also be controlled using the legacy TIM101 T-Cube™ controller.


  • Ø3/8" Mounting Barrel for Compatibility with Translation Stages
  • Compact Design: 31.5 mm x 17.0 mm (W x H)
  • 20 nm Typical Step Size
  • Manual Adjustment via Knob on Adjuster Screw
  • 125 V Maximum Operating Voltage
  • Also Available in 10 mm, 13 mm, and 25 mm Travel Versions
  • Ideal for Set-and-Hold Applications that Require High-Resolution Relative Positioning
  • Control Cable can be Adjusted up to 110° for Space-Constrained Applications

Thorlabs' PIA50 Piezoelectric Inertia Actuator provides high-resolution linear motion control with a long piezo-controlled translation range in a compact package. It can support loads up to 2.5 kg (5.51 lbs) and preloads up to 25 N with typical movements of 20 nm and no backlash. The step size can be adjusted up to 30% to a maximum of approximately 30 nm using the KIM101 Controller and Kinesis® software. However, due to the open-loop design, piezo hysteresis, and application conditions such as the direction of travel, the achieved step size of the system can vary by up to 20% and is not normally repeatable. An external feedback system will need to be used to overcome this variance.

This actuator has a Ø3/8" (Ø9.5 mm) barrel that can be mounted in a manual stage that has a Ø3/8" mounting clamp. For compatibility with 1/4"-80 threaded mirror mounts see our 10 mm travel piezo inertia actuator. The actuator is self-locking when at rest and when there is no power supplied to the piezo, making the actuator ideal for set-and-hold applications that require nanometer resolution and long-term alignment stability. Manual adjustments can be made using the knob on the adjuster screw, as long as the piezo is not actively translating the screw; the knob is also compatible with 5/64" (2.0 mm) hex keys.

Inertia Motor
Click for Details

The control cable can be adjusted up to 110° for space-constrained applications.

Powered by a 10 mm long discrete piezo stack, the actuator can operate at speeds of up to 3.5 mm/min. The design of the piezo motor will rotate the tip of the lead screw during translation. For information on the design of our piezo inertia "slip-stick" motor actuators, please see the complete presentation here.

Required Controller
A K-Cube Piezo Inertia Controller is required to operate our PIA50 Piezo Inertia Actuator; the actuator cannot be operated using a standard piezo controller. The K-Cube controllers have an internal sawtooth voltage signal generator capable of sending sub-millisecond pulses (steps) with controllable amplitudes from 85 V to 125 V. In addition to a single-channel driver, we offer a four-channel driver capable of single- or dual-channel operation, which is ideal for applications involving multiple motorized actuators, such as beam steering.

For more information, please see the full web presentation.

Posted Comments:
No Comments Posted
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PIA50 Support Documentation
PIA50Piezo Inertia Actuator, 50 mm Travel, Ø3/8" Mounting Barrel
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Stepper and DC Servo Drive Cables

Thorlabs' DRV, ZST, and ZFS Stepper Motor Actuators, as well as our Z9 DC Servo Motor Actuators, come with cables for connecting to the required controllers. Thorlabs also offers separate cables that may be used as extension cables.

Stepper Motor Cables
Thorlabs offers a variety of cables to support several stepper motor actuator and controller combinations. Supported stepper motors include our ZST, ZFS, and DRV actuators; supported controllers include our BSC benchtop controllers, our KST201 K-Cube™ Controller, and our MST602 Rack Control Module. In order to see which cable is compatible with a given combination of stepper motor and controller, please see the table below. The pin assignment for each cable is given in the Pin Diagrams tab. Please note that these cables cannot be used with motors and controllers that do not match their pin assignment, even if the connectors are the same.

DC Motor Cables
The PAA632 is a 2.5 m cable for our Z9 series of DC motor actuators. This cable is intended to be used with the KDC101 K-Cube DC Servo Motor Controller. The pin assignment for this cable is given in the Pin Diagrams tab. Although it uses a 15-pin connector, this cable is not compatible with any of our stepper motors.

BSC Benchtop Controller and
 MST602 Rack Controller
KST201 K-Cube Controller KDC101 K-Cube Controllera
PAA612 (1 m) or
PAA613 (3 m)
PAA614 (1 m)b -
DRV Stepper Motor Actuators
- PAA614 (1 m) -
ZST and ZFS Stepper Motor Actuators
- - PAA632 (2.5 m)
Z9 DC Servo Motor Actuators
  • Green shading indicates hardware for DC servo motors.
  • The KST201 K-Cube Controller can be used to drive our DRV Stepper Motor Actuators (excluding the DRV208, which is incompatible) at a reduced velocity.

PAA612 and PAA613 Stepper Motor Cables

DA15 Male D-Type to DE15 Female D-Type

DA15 Male Pin DE15 Female Pin Description
11 and 12 1 Limit Switch Ground
10 2 Reverse Limit Switch
9 3 Forward Limit Switch
7 4 Motor Phase B -
14 5 Motor Phase B +
8 6 Motor Phase A -
15 7 Motor Phase A +
6 9 Reserved for Future Use
5 13 5 V

PAA632 DC Servo Motor Cable

DE15 Male D-Type to DE15 Female D-Type


DE15 Male Pin DE15 Female Pin Description
1 1 Ground
2 2 Forward Limit Switch
3 3 Reverse Limit Switch
5 5 Motor -
7 7 Motor +
10 10 5 V Encoder Supply
11 11 Encoder Channel A
13 13 Encoder Channel B

PAA614 Stepper Motor Cable

DE15 Male D-Type to DE15 Female D-Type


DE15 Male Pin DE15 Female Pin Description
1 1 Ground
2 2 CCW Limit Switch
3 3 CW Limit Switch
4 4 Motor Phase B -
5 5 Motor Phase B +
6 6 Motor Phase A -
7 7 Motor Phase A +
10 10 +5 VDC
15 15 Ground

Posted Comments:
No Comments Posted
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
PAA612 Support Documentation
PAA612APT Stepper Motor Cable, DA15 Male to DE15 Female, 1 m
PAA613 Support Documentation
PAA613APT Stepper Motor Cable, DA15 Male to DE15 Female, 3 m
PAA614 Support Documentation
PAA614Customer Inspired! APT Stepper Motor Cable, DE15 Male to DE15 Female, 1 m
PAA632 Support Documentation
PAA632APT DC Servo Motor Cable for Z9 Motors, DE15 Male to DE15 Female, 2.5 m