ZOLIX MDP Series Ultra-Precision Compact Motorized Translation Stage

Overview

The ZOLIX MDP Series Ultra-Precision Compact Motorized Translation Stage is engineered for high-fidelity positional control in space-constrained optical and photonics laboratories. Based on the Couette-type mechanical architecture of crossed-roller bearing guidance and direct-drive ground-lead-screw actuation, the stage delivers sub-micron motion resolution and nanometer-level repeatability under open-loop operation. Its core design principle centers on minimizing thermal drift, mechanical hysteresis, and structural compliance—achieved through monolithic aluminum alloy construction (6061-T6), precision CNC milling and lapping, and coordinate-measuring-machine (CMM)-verified assembly. Unlike conventional OEM stages relying on belt or gear reduction, the MDP series implements a zero-backlash, direct-coupled 5-phase stepper motor and C3-grade ground screw (Φ6 mm, 1 mm pitch), enabling deterministic motion response without cumulative error accumulation across repeated cycles. The stage operates within ambient laboratory conditions (20 ± 2 °C, 40–60% RH) and is calibrated per ISO 230-2 Annex A for positioning performance verification.

Key Features

• Compact footprint: 40 × 40 mm and 65 × 65 mm platform options—optimized for integration into multi-axis optical breadboards, confocal microscope frames, and fiber alignment rigs.
• High-precision guidance: Japanese-sourced crossed-roller linear bearings ensure low friction (10⁶ motion cycles.
• Direct-drive actuation: Eliminates coupling-induced torsional compliance; enables full torque transmission (16–80 mN·m) at standstill and during acceleration.
• Rigorous metrology validation: Every unit undergoes full-axis CMM inspection post-assembly to verify parallelism (≤30 µm static, ≤15 µm dynamic), pitch/yaw deviation (<25 arcsec), and planarity.
• RoHS-compliant black anodized surface: Provides corrosion resistance, ESD-safe grounding path, and consistent coefficient of thermal expansion (CTE ≈ 23.6 × 10⁻⁶ /°C).
• Integrated USB interface: Native HID-class USB 2.0 communication eliminates need for external motion controllers; supports ASCII command protocol for LabVIEW, Python (PySerial), MATLAB, and custom DAQ systems.

Sample Compatibility & Compliance

The MDP stage is compatible with standard optical mounting accessories—including SM1 (1.035″-40) and M4/M6 tapped holes—and interfaces seamlessly with kinematic mirror mounts, fiber launchers, and piezo-assisted coarse/fine positioning stacks. It meets ISO 9001:2015 manufacturing process requirements and conforms to RoHS Directive 2011/65/EU for hazardous substance restriction. While not certified to IEC 61000-6-2 (immunity) or IEC 61000-6-4 (emissions) as a standalone component, its low-voltage DC operation (24 V nominal) and shielded USB interface ensure electromagnetic compatibility when installed per manufacturer-recommended grounding practices. For GLP/GMP-aligned applications requiring auditability, optional firmware logging (timestamped position commands and sensor status) can be enabled via host software.

Software & Data Management

ZOLIX provides a cross-platform SDK (Windows/macOS/Linux) supporting native API calls in C/C++, C#, Python, and MATLAB. The USB HID protocol transmits real-time position status, limit switch states, and homing completion flags—enabling synchronized triggering of cameras, lasers, or spectrometers. All motion profiles (trapezoidal, S-curve) are host-defined; no onboard trajectory generation occurs. Position data is output in µm resolution with 32-bit signed integer encoding. Firmware supports non-volatile storage of user-defined zero-offset calibration values, preserving alignment references across power cycles. Data export is CSV-formatted with ISO 8601 timestamps, facilitating traceability in FDA 21 CFR Part 11–governed environments when paired with validated electronic lab notebooks (ELNs).

Applications

• Precision optical alignment: Fiber-to-waveguide coupling, laser cavity mirror adjustment, interferometer path-length tuning.
• Metrology instrumentation: Integration into auto-focus modules for white-light interferometers and confocal profilometers.
• Quantum optics setups: Sub-micron positioning of single-photon detectors, Pockels cells, and electro-optic modulators in vacuum-compatible enclosures.
• Microfabrication tooling: Wafer-stage pre-alignment in maskless lithography systems where XY repeatability <2 µm is mandatory.
• Academic research platforms: Modular building block for custom-built optical tweezers, STED microscopy scanners, and adaptive optics wavefront correctors.

FAQ

What is the difference between MDP and MDT models?
The MDP series uses open-loop 5-phase stepper control with higher inherent resolution (1 µm/step half-step); the MDT variant adds an integrated optical encoder for semi-closed-loop feedback, improving long-term drift compensation at the cost of slightly reduced base resolution.
Can the stage operate in vacuum?
Standard units are rated for ambient air only; vacuum-compatible versions (with dry-lubricated bearings and outgassing-tested adhesives) are available under custom order (ZOLIX Part # MDP-VAC-XX).
Is backlash compensation supported in firmware?
No—backlash is mechanically minimized (<2 µm) during assembly; compensation algorithms are omitted to preserve deterministic motion behavior required in metrology-grade applications.
What is the maximum recommended payload for dynamic operation?
For accelerations >0.1 g and velocities >5 mm/s, payloads should not exceed 70% of the static load rating (i.e., ≤3.5 kg for MDP25) to maintain specified repeatability.
Does the USB interface support real-time streaming of position data?
Yes—position readout is available at up to 100 Hz via polling; hardware-triggered sampling (e.g., synchronized to camera exposure) is achievable using the TTL-compatible “busy” and “done” status lines on the auxiliary I/O header.