Direct Drive Rotary Tables (DDR)

IntelliDrives Direct Drive Rotary Tables (DDR) deliver zero‑backlash, high‑precision rotary motion for semiconductor, metrology, automation, robotics, and laser‑processing applications. By coupling a torque motor directly to the rotating axis, DDR stages eliminate mechanical transmission components such as gears and belts, resulting in smoother motion, higher accuracy, and reduced maintenance.

What Is a Direct Drive Rotary Table?

A direct drive rotary table uses a frameless torque motor integrated directly into the stage, removing all mechanical gearing. This architecture provides:

• Zero mechanical backlash for ultra‑smooth motion and precise angular positioning.
• High torque output at low speeds for demanding acceleration profiles.
• Exceptional accuracy with encoder feedback enabling arc‑second‑level performance.
• High stiffness through precision bearings such as cross‑roller, air, or ball bearings.
• Large center apertures for routing optics, cabling, or process media.
• Low maintenance due to the absence of gears, belts, and lubrication points.

IntelliDrives DDR Rotary Table Families

IntelliDrives offers a comprehensive portfolio of direct drive rotary tables engineered for different performance requirements, load capacities, and integration needs:

• RTH Series – Air‑bearing rotary tables for frictionless, ultra‑smooth motion.
• RR Series – Large‑aperture rotary tables for inspection, metrology, and optical systems.
• ACR Series – High‑torque servo rotary tables for heavy payloads and dynamic motion profiles.
• PSR Series – Ultra‑thin, low‑profile rotary tables for compact automation systems.
• SRT Series – Cross‑roller bearing rotary tables offering high stiffness and precision.
• mSRT Series – Miniature direct‑drive rotary stages for small‑format automation and instrumentation.

Featured Direct Drive Rotary Table Models

Below are representative models from the IntelliDrives DDR portfolio. Each model links to its dedicated product page for detailed specifications, CAD files, and ordering information.

• RTH‑200 – Air‑bearing DDR table with ultra‑smooth motion and 22 mm aperture.
• RR‑18‑14 – Large‑aperture rotary table for metrology and optical inspection.
• ACR‑250HT – High‑torque servo rotary table supporting heavy payloads.
• PSR‑180UT – Ultra‑thin rotary table for compact multi‑axis systems.
• SRT03–SRT10 – Cross‑roller bearing rotary tables for high stiffness and precision.

Applications of Direct Drive Rotary Tables

IntelliDrives DDR rotary tables are used across industries where precision, repeatability, and smooth motion are essential:

• Semiconductor manufacturing – wafer inspection, probing, alignment, and lithography.
• Metrology and inspection – optical measurement, CMM systems, and calibration equipment.
• Laser processing – rotary motion for cutting, drilling, marking, and scanning.
• Medical and life sciences – imaging, scanning, and sample positioning.
• Robotics and automation – multi‑axis motion platforms and precision indexing.
• Optics and photonics – beam steering, lens alignment, and optical component testing.

How to Select the Right DDR Rotary Table

Choosing the correct direct drive rotary table depends on several engineering factors:

• Aperture size – determines cable routing, optical paths, or part clearance.
• Load capacity – must support static and dynamic payload requirements.
• Accuracy and repeatability – critical for metrology and semiconductor applications.
• Peak torque – defines acceleration, deceleration, and dynamic performance.
• Speed – required for scanning, indexing, or high‑throughput automation.
• Bearing type – air, cross‑roller, or ball bearings depending on stiffness and smoothness needs.

For detailed specifications, CAD models, and integration support, visit the individual product pages linked above or contact IntelliDrives engineering for application‑specific guidance.