New parallel-kinematic nanopositioning direct-drive platform concept provides motion in 6 degrees of freedom
AUBURN, Mass., Aug. 5, 2025 /PRNewswire-PRWeb/ -- PI (Physik Instrumente), a global leader in precision motion control and photonics alignment solutions, announces the release of the new F-690.S1 SpaceFAB 6-axis alignment platform, purpose-built for high-throughput photonics integrated circuit (PIC) packaging and test applications.
With direct-drive linear motors, high-resolution, absolute-measuring encoders, and advanced alignment routines, the SpaceFAB nanopositioning platform is engineered to meet the most demanding requirements in silicon photonics, fiber array coupling, and free-space optics.
Advanced Mechanics Concept for High Dynamics and Repeatability
The foundation of the SpaceFAB system is a triad of XY nanopositioning stages, symmetrically arranged at 120° intervals, each equipped with cross-roller bearings and direct drive linear motors. Absolute encoders deliver nanometer-level resolution, while air pressure-activated brakes ensure positional safety during power loss or shutdown.
Each XY nanopositioning stage supports a linear bearing mounted on a wedge with a ball-joint connection — forming an architecture that allows the moving platform to rotate in pitch, yaw, and roll. This unique structure provides smooth, coordinated 6-DOF motion with high dynamic response, exceptional repeatability, and extended XY travel. The system is designed for long-term reliability, with robust, maintenance-free mechanics and the flexibility to operate in inverted orientations.
Intelligent Electronics with Fast PIC Alignment Capabilities
At the heart of the SpaceFAB alignment system is the ACS-based SPiiPlusEC motion controller, featuring three ultra-low-jitter NanoPWM drives and 24-bit A/D converters optimized for high-resolution optical signal acquisition – all fully integrated and configured by PI. This electronics suite enables ultra-precise optical feedback for real-time alignment optimization with minimal motion-induced noise.
The system supports direct Cartesian end-position commands, with all inverse kinematics and coordinate conversion handled within the controller. "Pivot Anywhere" a capability allowing the user to set the pivot point by software, is fully integrated, making adaptation to different PICs and mounting hardware easy.
Alignment Routines for Production-Scale Throughput
The SpaceFAB motion and alignment controller comes preloaded with a comprehensive suite of high-speed photonics alignment routines, including:
- Fast Multi-Channel Photonics Alignment (FMPA) Meander and Spiral Scans for efficient area-based signal acquisition and device characterization
- Multi-Axis Gradient Search for rapid signal optimization across multiple degrees of freedom
- PILightningFast First Light Search, an optional feature delivering first-light detection over a 500x500µm² area in just 0.3 seconds
These routines enable full-area spiral scans of 100×100µm² and 500×500µm² in as little as 0.3 seconds and 2 seconds, respectively. After first light detection, search gradient convergence occurs in just 0.3 seconds, supporting both coarse acquisition and fine optimization with unmatched efficiency.
Precision Specifications
- Travel Range: XY: 50mm, Z: 25mm, Rotational: Theta X / Y: 15°; Theta Z: 30°
- Max Speed: 500mm/s (linear), 100°/s (rotational)
- Minimum Incremental Motion (MIM): 10nm / 2 µrad
- Repeatability: ±50nm (XY), ±75nm (Z), ±2 µrad (rotational)
- Sensor Resolution: 1nm
Flexible Tooling and Integration
The F-690.S1 SpaceFAB 6-axis motion platform and alignment system is available with optional fiber and fiber array holders (model F-690.A1), featuring reversible fixture mounts for single fiber or array alignment. All necessary cables and accessories for controller connection are included.
Industries Served
Optimization of high-throughput processes in fields such as PIC, photonics, metrology, semiconductor test, micro-assembly, and optics.
More information: 6-Axis Motion System Datasheet
Case study: Photonics Chip Level Test Strategies in High Vibration Production Environments
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SOURCE PI (Physik Instrumente) LP
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