Accretech RONCOM 44DX Roundness and Cylindricity Measuring Instrument

Overview

The Accretech RONCOM 44DX is a high-precision roundness and cylindricity measuring instrument engineered for metrology laboratories and precision manufacturing environments requiring traceable, repeatable geometric form analysis. It operates on the principle of rotational axis deviation measurement using a hydrostatic air bearing spindle—ensuring minimal mechanical hysteresis and thermal drift. The instrument rotates the workpiece while a high-resolution tactile probe traces its surface profile in polar coordinates, enabling quantitative evaluation of form deviations including roundness, cylindricity, concentricity, coaxiality, parallelism, perpendicularity, flatness, and straightness. Its design adheres to international geometric dimensioning and tolerancing (GD&T) standards, supporting full compliance with ISO 1101 and ASME Y14.5 frameworks. The R44DX serves as a foundational platform for first-article inspection, process capability studies (e.g., Cpk analysis), and supplier quality audits where sub-micron angular and radial fidelity is mandatory.

Key Features

• Hydrostatic air bearing spindle delivering rotational accuracy of (0.02 + 4H/10000) µm—H denoting measurement height in mm—ensuring exceptional repeatability across vertical measurement ranges up to 500 mm.
• Offset-type chuck configuration with 80 mm radial probe offset from the R-axis extension line, eliminating probe interference during deep-hole or thick-wall internal diameter measurements.
• Three chuck variants: Standard (single-step transition from OD to top surface), Manual (R44-series operation), and Automatic (optional CNC-integrated version supporting simultaneous OD/ID/top/bottom/conical surface probing).
• Intuitive manual centering and tilt adjustment via histogram-based visual feedback—no computational input required; accessible to operators without advanced metrology training.
• CNC programmability: Full measurement sequences—including manual or automated centering, data acquisition, GD&T evaluation, and report generation—are recordable and replayable. Once calibrated for a part family, subsequent inspections require only fixture alignment and coordinate system initialization.
• Compact footprint—25% reduction versus prior-generation Tokyo Seimitsu systems—optimized for constrained lab or production-floor integration without compromising structural rigidity or thermal stability.

Sample Compatibility & Compliance

The RONCOM 44DX accommodates cylindrical, disc-shaped, and stepped components with diameters ranging from 5 mm to 400 mm and heights up to 500 mm. It supports both external and internal surfaces—including bores down to Ø15 mm—via interchangeable probe arms and stylus configurations. All measurement routines are structured to comply with ISO 5436-1 (Geometrical Product Specifications – Surface Texture) and ISO 12181 (Roundness) requirements. Traceability is maintained through documented calibration procedures aligned with ISO/IEC 17025–accredited practices. When operated under controlled environmental conditions (20 ± 1 °C, <50% RH), the system meets uncertainty budgets suitable for GLP/GMP-regulated validation protocols and FDA 21 CFR Part 11–compliant audit trails when paired with TIMS software’s electronic signature and revision history modules.

Software & Data Management

TIMS (Tokyo Seimitsu Integrated Measurement System) provides a unified interface for acquisition, analysis, visualization, and reporting. Core GD&T evaluations include roundness, cylindricity, flatness, parallelism, perpendicularity, coaxiality, concentricity, and straightness—all computed per ISO 1101 Annexes. Advanced analytical modules include:

• Notch removal function (manual or auto-mode) for suppressing groove-induced artifacts in contour data.
• Fourier spectral analysis with power spectrum density (PSD) plots—used to correlate harmonic amplitude distribution with mechanical vibration sources or machining tool harmonics.
• Load curve and amplitude distribution analysis for wear-life prediction based on surface contact probability models.
• SLOPE interval analysis (optional): Evaluates peak-to-valley deviation over user-defined angular sectors (0°–360°), outputting 2D polar plots, unwrapped Cartesian profiles, or tabular sector summaries.
• Gear tip roundness analysis (optional), piston profile comparison against parametric CAD-derived nominal curves (via formula-driven or manual input), and full contour analysis (optional) supporting ISO 11562-compliant filtering and feature extraction.
• Customizable reporting templates support multi-result page layouts, comparative overlay graphs, and export to CSV, PDF, or XML for LIMS integration.

Applications

The RONCOM 44DX is deployed across aerospace (turbine shafts, bearing races), automotive (crankshafts, fuel injector nozzles, piston rings), medical device manufacturing (orthopedic implants, syringe barrels), and precision optics (lens mounts, collimator housings). It supports PPAP submissions, APQP gate reviews, and Six Sigma DMAIC projects by providing statistically valid form error distributions. In R&D labs, it validates CNC turning and grinding process parameters; in QC labs, it verifies conformance to drawing specifications before shipment. Its compatibility with third-party fixtures enables integration into automated cell environments when configured with optional robotic loading interfaces.

FAQ

What standards does the RONCOM 44DX support for roundness and cylindricity evaluation?

It complies with ISO 12181 (Roundness), ISO 12180 (Cylindricity), ISO 1101 (GD&T), and ASME Y14.5—enabling direct comparison with international engineering drawings.

Can the system measure deep internal bores without probe collision?

Yes—the offset chuck positions the stylus tip 80 mm below the R-axis extension line, permitting unobstructed access to internal features with aspect ratios exceeding 5:1.

Is TIMS software validated for regulated industries?

TIMS supports 21 CFR Part 11–compliant electronic signatures, audit trail logging, and user role-based access control—configurable for GxP-aligned validation protocols.

Does the instrument support automated measurement sequencing?

The R44DX supports full CNC programming and playback; optional automation packages integrate with PLC-controlled loaders and barcode-triggered part recognition.

What environmental conditions are required for optimal performance?

Operation within a temperature-stabilized environment (20 ± 1 °C), humidity <50%, and vibration-isolated mounting is recommended to maintain stated metrological performance.