Ultra-Compact Piezoelectric Rotary 3-Axis Gimbal Stage for Precision Motion
Introducing the ROMO-3AX-SYS the world’s smallest lightweight
piezoelectric rotary 3-axis gimbal platform designed for superior precision
and expanded functionality for advanced applications.
Key Advantages of ROMO-3AX-SYS System
- Compact light weight design
- Superior Resolution: <30 µrad ( 0.0017° per step) = >200,000 steps per full rotation
- Max Speed: > 600 rpm
- Fast Response Time: ≈30 µs
- Low Voltage Design: 5 V DC
- Zero power consumption in hold mode
- Encoder (optional): 6.1 mrad close loop resolution
Design Principle
The ROMO-3AX-SYS system integrates three precision miniature rotary piezomotors (PMC Model# ROMO) into a compact rotary 3-axis gimbal stage, providing precise multi-axis motion in an ultra-small footprint. It is ideal for space-limited applications where silent operation, zero backlash, and sub-microradian resolution are required. The ROMO-3AX-SYS offers reliable, high-precision control for industries where traditional stepper or servo motors are too bulky, heavy or generate electromagnetic interference, making it ideal for next-generation motion solutions in photonics, life sciences, miniature drones and precision instrumentation.
Electronic Driver Supports UART & I2C
The electronic driver is designed to offer an economical interface for
user control. Motion of the motor is achieved via PWM (Pulse Width Modulation) control signals. The driver PCB also supports I2C interface. The driver PCB is pre-programmed for software configurability, optimizing drive signals and integrating controls. Motor operation can
be finely regulated through closed-loop control using an optional encoder factory-installed on the actuator.
Typical Applications
PHOTONICS AND OPTICS
- Laser beam alignment and steering
- Fiber optic alignment for telecom or laboratory systems
- Optical switching and MEMS device positioning
MICROSCOPY AND LIFE SCIENCES
- Automated sample positioning and scanning
- Focus adjustment for imaging systems
- Compact stages for fluorescence or confocal microscopy
TEST AND MEASUREMENT
- Sensor and probe positioning in lab automation
- Fine calibration of microelectronic components
- Alignment in spectrometry or interferometry setups
DRONE & PORTABLE EMBEDDED DEVICES
- Field-deployable optical or analytical instruments
- Medical devices requiring ultra-compact motion systems
ROMO-3AX System Specifications
| Motor Model # | ROMO-3AX-SYS (no encoder) or ROMO-3AX-E-SYS (with encoder) |
| Actuator Type | Rotary Piezoelectric Motor (Hollow Shaft) |
| Control Type (no encoder) | Open-Loop (no encoder) |
| Control Type (with encoder) | Python™ API software included with Closed-Loop System |
| Actuator Dimensions (hollow shaft) | 13 × 23.0 × 8.15 mm (Model# ROMO) 13 × 23.0 × 9.15 mm (Model # ROMO-E) |
| System Weight | 15.0 g non-encoder model or 17.0 g encoder models |
| Rotor Diameter | 13 mm |
| Hollow Shaft Diameter | 2.5 mm |
| Rotor Runout | ≤50 µm |
| Maximum Axial Load | 200 g |
| Maximum Radial Load | 200 g |
| Moment of Inertia | 29.2 g·mm² |
| Self-Braking Torque | 5 mNm |
| Stall Torque | 4 mNm |
| Power Supply Voltage | 7.5 V DC (5.0 V encoder version) |
| Max Current (over velocity range) | 30 mA – 300 mA |
| Frequency Response | 4 kHz |
| Actuator Response Time | 30 s |
| Encoder Type | Magnetic |
| Max Speed | 600 rpm |
| Angular Backlash | 30 µrad |
| Angular Hysteresis | 30 µrad |
| Minimum Angular Step | 30 µrad |
| Minimum Encoder-Controlled Angular Step | 6.1 mrad (Encoder Model Only) |
| Encoder Resolution (after quadrature) | 1,024 ppr (Encoder Model Only) |
| Uni-directional Repeatability |
6.1 mrad (Encoder Model Only)
|
| Operating Temperature | −20 °C to +80 °C |
Ordering Information
| Part Number | Description |
| ROMO-3AX-SYS | Includes: 3-Axis positioning system (non-encoder version), 3 X Driver PCB’s, I2C adapter board, Raspberry Pi Controller interface with LCD Display and Python API, 120/240 VAC to 5 VDC power adapter and cables. |
| ROMO-E-3AX-SYS | Includes: 3-Axis positioning system (with optical encoders), 3 X Driver PCB’s, I2C adapter board, Raspberry Pi Controller interface with LCD Display and Python API close-loop software, 120/240 VAC to 5 VDC power adapter and cables. |
ROMO-3AX-SYS System dimensional drawings
