BGM200BPP Motorized Goniometer

The model BGM200BPP features a worm mounted rotary encoder for improved accuracy and repeatability. The encoder also provides a method for detecting motor stalling, an important feature for applications with high loads or torques. BG Series goniometric cradles rotate on a transverse axis above the platform. Compared to full 360 ° rotation stages, they offer maximum free access to the rotating part and allow construction of very compact multi-axis rotation assemblies. BG cradles are designed so that orthogonal mounting of two adjacent-size cradles (e.g., BGS50 and BGS80) provides two perpendicular rotational axes intersecting at about the same point in space. Mounting a rotation stage under the assembly adds a third orthogonal rotation axis through the same point. Precision rotation is ensured by a precision ground, hardened worm gear drive. Single row ball bearings and precision ground tool-steel races ensure smooth rotation with minimal wobble and eccentricity. A home switch, conveniently located at the center of travel, facilitates the return of the platform to a level position.

Precision Multi-Axis Assemblies

BG goniometers are designed so that two adjacent-sized models can be directly mounted orthogonally to each other (for example, BGS80 with BGM120) to pivot about the same point in space. The direct mounting capability saves set-up time, design time, and adapter plate costs. For additional rotation axes, a rotation stage can be mounted under the assembly or on the top BG platform. The video demonstrates an open access, multi-axis tip, tilt and rotation assembly with two BG goniometers and two rotation stages.

Open Rotation Platform

The BG series stages provide up to ±45° of transverse axis rotation enforced with mechanical limit switches. The stage is designed for maximum free access to the rotating platform, allowing for simplified stacking and mounting.

Precision Worm Gear Drive

Precise rotation is ensured by a precision ground, hardened worm gear drive. In addition to being non-backdrivable, the worm gear drive's advantages include higher MIM, repeatability, and overall accuracy.

Ball Bearings with Tool-Steel Races

Single-row ball bearings and precision-ground, hardened tool-steel races ensure smooth rotation with minimal wobble and eccentricity. This allows for higher load capacities, stiffness, and stability.

Stepper Motor Versions

Basic working principle of a stepper motor

The PP and BPP mini-step drive versions are for applications that require higher speeds. For higher torque and vacuum applications, the PE and BPE full-step drive versions are recommended.

Specifications

Technical Specs

Angular Range
-45 to +45°
Centered Load Capacity
500 N
Minimum Incremental Motion
2.0 mdeg
Maximum Speed
20°/s
Maximum Torque
17 Nm
Wobble, Typical
±100 µrad
Accuracy, Typical
±25 mdeg
Uni-directional Repeatability (Typical)
±2.0 mdeg
Bi-directional Repeatability (Typical)
±12 mdeg
Transversal Compliance
2 µrad/Nm
Origin
Optical, centered
Origin Repeatability
±2.5 mdeg

Feedback
Worm mounted rotary encoder with index pulse, 2,000 cts/rev
Encoder Resolution
0.001°
Limit Switches
Mechanical, at ±45°
Connectors
DB25M
Cable Length
3 m
Rotation Axis Height
225 mm
Weight
38 kg
Thread Type
1/4-20
MTBF
20,000 h (25% load, 10% duty cycle)
Compliance
RoHS 3, CE

Angular Range
-45 to +45°
Centered Load Capacity
500 N
Minimum Incremental Motion
2.0 mdeg
Maximum Speed
20°/s
Maximum Torque
17 Nm
Wobble, Typical
±100 µrad
Accuracy, Typical
±25 mdeg
Uni-directional Repeatability (Typical)
±2.0 mdeg
Bi-directional Repeatability (Typical)
±12 mdeg
Transversal Compliance
2 µrad/Nm
Origin
Optical, centered
Origin Repeatability
±2.5 mdeg

Feedback
Worm mounted rotary encoder with index pulse, 2,000 cts/rev
Encoder Resolution
0.001°
Limit Switches
Mechanical, at ±45°
Connectors
DB25M
Cable Length
3 m
Rotation Axis Height
225 mm
Weight
38 kg
Thread Type
1/4-20
MTBF
20,000 h (25% load, 10% duty cycle)
Compliance
RoHS 3, CE

Resources & Downloads

Related Products

Compatible Controllers

Based on axis required, choose a specific controller to pair with the stage. Along with an XPS-D or XPS-RLD controller, a driver module is required.

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		xps-d-universal-motion-controller¹XPS-D Universal High-Performance 1-8 Axis Motion Controller and Driver	UNIVERSAL
		xps-rl-universal-high-performance-motion-controller²XPS-RLD Universal High-Performance 1-4 Axis Motion Controller and Driver	UNIVERSAL
		esp301-3-axis-dc-and-stepper-motion-controllerESP302 3-Axis DC and Stepper Motion Controller	UNIVERSAL

Notes:

Requires XPS-DRV11 driver module
Requires XPS-DRV11 driver module

Accessories

Description	Compatibility	Avail.	Price
MMCABLE-REGInline Regulator, 5 VDC, for MMCABLEs 5 m or longer	UNIVERSAL	In Stock	$252
M-SK-M6ABlack Oxide Screw Kit, M6, Assortment, Qty 261	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$75
M-FK-BLXL-Allen Wrench Set, Sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm, Metric	METRIC	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$37

Similar

Description	Compatibility	Avail.	Price
BGM120CCMotorized Goniometer, ±45° Travel Range, DC Motor Drive, BGM120	IMPERIAL	9 Weeks	$14,210
BGS80PPMotorized Goniometer, ±45° Travel Range, Micro-step Drive, BGS80	UNIVERSAL	7 Weeks	$7,622
URS150BPPMotorized Rotation Stage, Stepper, Continuous 360° Motion, URS150	UNIVERSAL	In Stock	$6,159

Motorized Goniometer, ±45 ° Travel Range, Micro-step Drive, BGM200

Model: BGM200BPP

Product Series Overview