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ROMO

Rotary Piezo Motor 4 mNm / 11,4 mm 

ROMO (plastic) and ROMO-M (metal) series piezo rotary motor with a plain hollow shaft.

Key Features

  • Torque: >4,0 mNm
  • Resolution: > 30 µRad = 200.000 steps per rotation
  • Max Speed: >600 RPM
  • Fast Response Time: < 30 µs
  • Low Voltage: 5 to 7,5 V DC
  • Low Current: 30 mA to 300 mA (max)
  • Energy efficient: Zero power consumption in hold

Piezo Motor Company’s new range of miniature piezomotors sets new benchmarks for compact, high-performance rotary and linear piezoelectric actuators/motors. We’ve combined lightweight design with superior precision and functionality.

These piezomotors are exceptionally energy-efficient, requiring no power in the hold position while still maintaining full torque and force. This efficiency makes them ideal for demanding OEM applications where performance and cost-effectiveness are paramount.

Designed to operate at low voltage (5 to 7,5 V DC) and small currents (e.g., 30 mA), the new PMC piezomotors are available with optional factory-installed encoders and boast several distinctive features:

  • Constructed from modern, reinforced engineered thermoplastics for reliability and affordability.
  • Unmatched precision and resolution.
  • Ultra-fast response times and exceptional start-stop capabilities.
  • High torque relative to size, optimized for direct-drive applications.
  • Support for stepping and continuous modes of operation.
  • A speed dynamic range spanning six orders of magnitude.
  • Silent operation in continuous mode and a low voltage design to minimize electrical arcing.

Technical Data

Model ROMO
Power Supply 5,0 to 7,5 V DC
Stall Torque  ≥ 4 mNm
Self Braking Torque ≥ 5 mNm
Actuator Response Time » 30 µs
Max Speed > 600 rpm
Minimum Angular Step » 30 µrad
Angular Backlash 30 µrad
Angular Hysteresis 30 µrad
Frequency Response 4 kHz
Operating Temperature -20 °C to 80 °C
Maximum Axial Load 200 g
Maximum Radial Load 200 g
Moment of Inertia 29,2 g·mm²
Maximum Radial Load 200 g
Max Current over velocity range 30 mA to 300 mA
Rotor Runout ≤ 50 µm
Actuator Weight 3,5 g
Actuator Dimensions (no shaft) 13 x 18,7 x 9,1 mm

 

Ordering Information

 

Model Part Number Description
ROMO ROMO-011-0370  ROMO Rotary motor, plastic enclosure, without Encoder
ROMO-KIT ROMO-011-0371 ROMO Rotary motor, plastic enclosure, without Encoder,
ROLR-PCB Electronic Driver PCB, cables,
120/240 VAC to 5 V DC or 7,5 V DC wall power adapter
ROMO-M ROMO-012-0370  ROMO Rotary motor, metal enclosure, without Encoder
ROMO-M-KIT ROMO-012-0371 ROMO Rotary motor, metal enclosure, without Encoder,
ROLR-PCB Electronic Driver PCB, cables,
120/240 VAC to 5 V DC or 7,5 V DC wall power adapter

 

Downloads

ROMO brochure (PDF)
ROMO manual (PDF)

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