The M-BGM160CC is a motorized goniometric cradle with ±45° transverse rotation, designed for high-precision tip and tilt applications with open access to the load. It uses a precision ground worm gear drive with 0.002° minimum incremental motion and a worm-mounted rotary encoder (2000 counts/rev) with an index pulse. The stage is driven by a high-torque DC motor with a built-in tachometer for speed stability. Mechanical limit switches constrain motion at ±45°, and an optical origin is at 0°. The base is stainless steel with an aluminum body; single-row ball bearings and hardened tool-steel races ensure low wobble. It supports a 300 N centered load and up to 10 Nm torque with the CC drive version. Vacuum compatible to 10⁻⁶ hPa. Dimensions are 200 mm × 150 mm base, 160 mm height, with a 156 mm × 92 mm mounting pattern. Includes a 3 m cable with SUB-D25M connector.
The M-BGM160CC 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
| Newport MKS | |
|---|---|
| Product Category | Linear Slides and Linear Stages |
| Product Number | M-BGM160CC |
| Product Name | Motorized Goniometer, ±45 ° Travel Range, DC motor, M6, BGM160 |
| Axis Configuration | Tip/Tilt Axes |
