Motorized Goniometer, ±45° Travel Range, Micro-step, M6, BGM200

The M-BGM200BPP Metric Goniometer 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. This PP mini-step drive version enables high angular speeds up to 20°/sec .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.
Specifications
- Angular Range-45 to +45°
- Centered Load Capacity500 N
- Minimum Incremental Motion2.0 mdeg
- Maximum Speed20°/s
- Maximum Torque17 Nm
- Wobble, Typical±100 µrad
- Accuracy, Typical±25 mdeg
- Uni-directional Repeatability (Typical)±4.0 mdeg
- Bi-directional Repeatability (Typical)±12 mdeg
- Transversal Compliance2 µrad/Nm
- OriginOptical, centered
- Origin Repeatability±2.5 mdeg
- Encoder Resolution0.001°
- Limit SwitchesMechanical, at ±45°
- ConnectorsDB25M
- Cable Length3 m
- Axial Stiffness5 N/µm
- 225 mm
- Weight38 kg
- Thread TypeM6
- MTBF20,000 h (25% load, 10% duty cycle)
- ComplianceRoHS 3, CE


Resources & Downloads
3D Product Models
2D Product Drawings
M-BGM200PP_Drawing(369 kB, PDF)
Literature
BG Data Sheet.pdf(3.4 MB, PDF)
Manuals
BG Goniometric Cradles User Manual 2(1.8 MB, PDF)
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