URS Precision Stepper Motor Rotation Stages

The URS family of rotation stages provides 360° continuous motion in a low profile package and is suitable for research and industrial applications needing precision performance at an affordable cost. Stepper motors are a lower cost alternative to DC servo systems for less demanding applications. The URS stepper motor stages feature micro-stepping to improve resolution and smoothness of motion, with a minimum incremental motion size smaller than that of their DC motor driven equivalents. Run open-loop, pulse count is a good indicator of position.

Economical, general purpose
Flexible preloading system guarantees backlash-free operation
Tilted worm screw arrangement and 4 symmetric mounting holes provide better support for cantilevered loads with a smaller footprint
Plug and Play – ESP compatible
Lower cost alternative to DC servo systems

See All Features

Description	Compatibility	Price
URS100BPP URS Precision Stepper Motor Rotation StagesMotorized Rotation Stage, Stepper, Continuous 360° Motion, URS100	UNIVERSAL	$5,286
URS150BPP URS Precision Stepper Motor Rotation StagesMotorized Rotation Stage, Stepper, Continuous 360° Motion, URS150	UNIVERSAL	$6,038
URS50BPPV6 URS Precision Stepper Motor Rotation StagesMotorized Rotation Stage, Vacuum Compatible, Stepper, URS50	UNIVERSAL	$5,625
URS50CPP URS Precision Stepper Motor Rotation StagesMotorized Rotation Stage, Stepper, Continuous 360° Motion, URS50	UNIVERSAL	$3,377
URS75BPP URS Precision Stepper Motor Rotation StagesMotorized Rotation Stage, Stepper, Continuous 360° Motion, URS75	UNIVERSAL	$4,783
URS75BPPV6 URS Precision Stepper Motor Rotation StagesMotorized Rotation Stage, Vacuum, Stepper Motor, URS75	UNIVERSAL	$7,638

Compatible Controllers

Compatible motion controllers for these stepper motor driven stages are:

XPS-RLD Motion Controller (2 or 4 Axis): Requires an XPS-DRV11 Driver Module.
XPS-D Motion Controller (2, 4, 6 or 8 Axis): Requires an XPS-DRV11 Driver Module.
ESP302 Motion Controller (1, 2, or 3 Axis): Plug and Play compatible with ESP302 Motion Controller.
SMC100PP* Single Axis Motion Controller.

* Minimum incremental motion of URS50CPP is 1.125 mdeg with SMC100PP controller.
Minimum incremental motion of URS-BPP is 1.0 mdeg with SMC100PP controllers.
Speed of URS-CPP and URS-BPPV6 will be reduced to 40% of specified speed in datasheet with SMC controller.

Specifications

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URS50 and URS75 also available in a vacuum compatible version -PPV6.

Features

Tilted Worm Screw

The tilted worm screw arrangement allows for 4 symmetric mounting holes as compared to other designs that only feature 2 or 3 mounting holes. This enables the URS-B stages to provide better support of higher or off-centered loads. Additionally, the flexible preloading system for the worm gear was improved to minimize backlash during operation.

URS50CPP Top View

Economical Micro-stepping Stepper Motor

The stepper motor version is a more economical version for less demanding applications. When used with motion controllers with high micro-step capability, like the XPS or ESP30x, low noise operation and very small incremental motions are guaranteed. The stepper motor versions do not use encoder feedback, but reach a position by the number of commanded steps and microsteps. For this purpose, the stepper motor is directly attached to the worm screw using a proprietary bellows coupling that has a high torsional stiffness, eliminating the need for a gear or belt drive. The high output torque of the stepper motor minimizes the risk of lost steps and provides good linearity between commanded microsteps and the actual motion of the stage.

Basic working operation of a micro-stepping stepper motor

Vacuum Compatible Versions

The URS50BPPV6 and URS75BPPV6 are vacuum compatible versions of the URS series stepper motor stage. They can be used in vacuum environment down to 10-6 hPa.

Proprietary Ball Bearings

All URS-B rotation stages feature a proprietary ball bearing to provide a low-profile compact stage with exceptional stiffness, high reliability and low wobble and eccentricity.

Limit Switches

Except for the URS50 version, all URS stages feature adjustable limit switches to prevent over travel.

Metrology Report Included at No Additional Cost

Newport guarantees specification values which are measured and recorded following ASME B5.57 and ISO 230-2 standards. The typical performance values are two times better than the guaranteed specifications.

Accessories

Mounting Accessories

Description	Compatibility	Price
M-URS100TP Mounting Plate, Solid Top, URS100 Series, M6 Threaded Holes	METRIC	$231
M-URS150TP Mounting Plate, Solid Top, URS150 Series, M6 Threaded Holes	METRIC	$316
M-URS75TP Mounting Plate, Solid Top, URS75 Series, M6 Threaded Holes	METRIC	$215
URS100TP Mounting Plate, Solid Top, URS100 Series, 1/4-20 Threaded Holes	IMPERIAL	$231
URS150TP Mounting Plate, Solid Top, URS150 Series, 1/4-20 Threaded Holes	IMPERIAL	$316
URS75P1 Lens Barrel Adapter, B25.4, URS75 Stages	UNIVERSAL	$191
URS75TP Mounting Plate, Solid Top, URS75 Series, 1/4-20 Threaded Holes	IMPERIAL	$215
URSBK 90 Degree Mounting Bracket, URS75, URS100, URS150 Rotation Stages	UNIVERSAL	$648