Motorized Goniometer, ±45° Travel Range, DC motor, M6, BGM200

bg series motorized goniometric cradles with 3 goniometer stages shown

The M-BGM200CC Metric Goniometer uses a high torque DC motor. This motor also features a built-in tachometer to provide superior speed stability. 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.

Performance DC Motor and Encoder Versions

DC motors are best characterized by their smooth motion, high speeds, good efficiency and high power/weight ratio. These BG cradles with DC motors offer higher torque and repeatability, and all encoders come with index pulses for precision homing. The BGS50CC uses a miniature DC servo motor, kept in a compact, lightweight package. All other models feature a high resolution, worm mounted rotary encoder which bypasses most drive train errors, resulting in improved bi-directional repeatability. The BGM models use high torque DC motors with a built-in tachometer to provide superior speed stability.

Goniometric Cradle Load Characteristics

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
10 Nm
Wobble, Typical
±100 µrad
Accuracy, Typical
±25 mdeg
Uni-directional Repeatability (Typical)
±4.0 mdeg
Bi-directional Repeatability (Typical)
±12 mdeg
Transversal Compliance
2 µrad/Nm
Origin
Optical, centered
Origin Repeatability
±2.5 mdeg

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
M6
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
10 Nm
Wobble, Typical
±100 µrad
Accuracy, Typical
±25 mdeg
Uni-directional Repeatability (Typical)
±4.0 mdeg
Bi-directional Repeatability (Typical)
±12 mdeg
Transversal Compliance
2 µrad/Nm
Origin
Optical, centered
Origin Repeatability
±2.5 mdeg

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
M6
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	Price
MMCABLE-REGInline Regulator, 5 VDC, for MMCABLEs 5 m or longer	UNIVERSAL	$240
M-FK-BLXL-Allen Wrench Set, Sizes: 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm, Metric	METRIC	$36
M-SK-M6ABlack Oxide Screw Kit, M6, Assortment, Qty 261	UNIVERSAL	$74

Similar

Description	Compatibility	Price
BGM160CCMotorized Goniometer, ±45 ° Travel Range, DC Motor Drive, BGM160	IMPERIAL	$24,459
BGS80CCMotorized Goniometer, ±45° Travel Range, DC motor Drive, BGS80	UNIVERSAL	$8,285
RV240CCMotorized Rotation Stage, 240 mm, High-Speed DC Drive	UNIVERSAL	$13,482
M-BGM120CCMotorized Goniometer, ±45° Travel Range, DC motor, M6, BGM120	METRIC	$13,931
URS150BCCMotorized Rotation Stage, DC Motor, Continuous 360° Motion, URS150	UNIVERSAL	$6,341