Tokyo Seimitsu Stylus Profilometer DM45514

Overview

The Tokyo Seimitsu DM45514 is a high-precision contact stylus profilometer engineered for quantitative surface topography characterization in R&D laboratories and precision manufacturing environments. Operating on the principle of inductive displacement sensing, the system employs a diamond-tipped stylus (typically 2 µm or 5 µm tip radius) traversing the sample surface at controlled velocity, converting mechanical deflection into high-fidelity analog voltage signals. These signals are digitized with 16-bit resolution and processed to generate traceable 2D profile and 3D surface maps. Designed and manufactured in Japan by ACCRETECH—a leader in metrology-grade motion control and sensor integration—the DM45514 delivers metrological stability suitable for calibration-lab-grade verification of surface finish, step height, waviness, and form deviation. Its rigid granite base, air-bearing linear stage, and low-noise transducer architecture minimize environmental coupling and ensure repeatable sub-nanometer vertical resolution under controlled laboratory conditions (20 ± 1°C, <45% RH).

Key Features

• High-stability granite base with integrated vibration isolation support for long-duration scanning (up to 100 mm travel)
• Programmable scan speed (0.1–5 mm/s) with real-time velocity feedback control to maintain constant stylus load (typically 0.5–5 mN)
• Dual-axis (X-Z) motorized positioning for precise stylus alignment and multi-region measurement without manual repositioning
• Modular probe head design compatible with interchangeable diamond styli (2 µm, 5 µm, 12.5 µm tip radii) and optional skidless or skid-type configurations
• Integrated temperature-compensated linear variable differential transformer (LVDT) sensor with <0.1 nm RMS electronic noise floor
• Native support for ISO-compliant filtering (Gaussian, 2RC, phase-corrected) and automatic cutoff wavelength selection per ISO 16610-21

Sample Compatibility & Compliance

The DM45514 accommodates flat, curved, or gently contoured samples up to Ø200 mm × 50 mm height, including metallic substrates (e.g., hardened steel, aluminum alloys), silicon wafers, optical glass, ceramic bearing surfaces, and coated medical implants. Sample mounting utilizes vacuum chucks or kinematic fixtures to prevent slippage during scanning. All measurement algorithms and reporting modules conform to international standards governing surface texture metrology: ISO 25178-2 (areal surface texture parameters), ISO 4287 (profile roughness), ISO 4288 (lay and sampling length evaluation), and ASME B46.1 (U.S. national standard for surface texture). The system supports GLP/GMP-aligned audit trails when operated with compliant software configurations and is routinely deployed in ISO/IEC 17025-accredited labs for supplier qualification and process capability studies.

Software & Data Management

The instrument operates with ACCRETECH’s proprietary SURFPAK V6 software suite, which provides full traceability through encrypted raw data logging (binary .SPK format), timestamped operator logs, and configurable electronic signatures. Data export includes CSV, DXF, and STEP AP214 for CAD-based tolerance analysis. The software implements FDA 21 CFR Part 11-compliant user access levels (Administrator, Technician, Viewer), electronic signature workflows, and immutable audit trails for parameter changes, calibration events, and report generation. Raw profiles are stored with embedded metadata—including stylus ID, calibration date, environmental readings, and filter settings—to satisfy regulatory documentation requirements in aerospace, semiconductor, and orthopedic device manufacturing.

Applications

• Quantitative verification of grinding, lapping, and polishing processes on bearing races and hydraulic valve plates
• Step height and sidewall angle measurement of MEMS structures and thin-film photomasks
• Waviness assessment of precision-ground shafts per ISO 1101 geometric tolerancing
• Surface defect quantification (scratches, pits, digs) in optical components per MIL-PRF-13830B
• Form error decomposition (flatness, curvature, tilt) in ultra-precision optics substrates
• Inter-laboratory comparison studies supporting ISO/IEC 17043 proficiency testing programs

FAQ

What stylus tip radii are supported by the DM45514?

Standard configurations include 2 µm, 5 µm, and 12.5 µm diamond styli; custom tips (e.g., 0.5 µm radius) are available upon request and subject to application review.
Does the system support automated multi-point measurement across large parts?

Yes—when integrated with optional motorized rotary or XYZ stages, the DM45514 can execute unattended grid-based profiling sequences with programmable coordinate referencing and feature-based alignment.
Is calibration traceable to NMI standards?

All factory calibrations are performed using NIST-traceable step-height artifacts (e.g., NIST SRM 2101) and documented in accordance with ISO/IEC 17025 clause 6.6.
Can the DM45514 measure soft or compliant materials?

With appropriate stylus load reduction (down to 0.1 mN) and low-scan-speed protocols, it is suitable for polymers, elastomers, and certain thin polymer coatings—subject to pre-test feasibility assessment.
What maintenance intervals are recommended for long-term metrological reliability?

Annual verification of vertical scale linearity and lateral positioning accuracy is advised; stylus wear inspection is required after every 500 hours of cumulative scanning time or per ISO 25178-700.