Compare Model Drawings, CAD & Specs Centered Load Capacity Minimum Incremental Motion Bi-directional Repeatability (Typical) Availability Price
$11,125
200 N 2.0 mdeg ±12 mdeg
bg series motorized goniometric cradles with 3 goniometer stages shown
$18,557
300 N 2.0 mdeg ±12 mdeg
bg series motorized goniometric cradles with 3 goniometer stages shown
$23,368
500 N 2.0 mdeg ±12 mdeg
$5,195
In Stock
20 N 0.50 mdeg ±6.5 mdeg
In Stock
$6,709
In Stock
60 N 0.50 mdeg ±1.5 mdeg
In Stock
$11,125
200 N 2.0 mdeg ±12 mdeg
bg series motorized goniometric cradles with 3 goniometer stages shown
$18,557
300 N 2.0 mdeg ±12 mdeg
bg series motorized goniometric cradles with 3 goniometer stages shown
$23,368
500 N 2.0 mdeg ±12 mdeg

Stepper Motor version is also available.

Specifications

Features

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.

CONEX Controller Version

Newport also offers a version of the DC motor, 50-mm2 platform goniometer with integrated CONEX controller, the CONEX-BGS50CC. For out-of-the box control, the CONEX controller is preconfigured and delivered with the BGS50CC goniometer.

Goniometric Cradle Load Characteristics

Compatible Controllers

Compatible motion controllers for these DC motor driven stages are shown below:

Additionally, the BGS80CC and BGS50CC are compatible with the SMC100CC single-axis DC motor motion controller.