AutoCal AC-02 Robotic Repeatability Verification System

Overview

The AutoCal AC-02 Robotic Repeatability Verification System is an industrial-grade, non-contact metrology solution engineered for objective, high-throughput validation of robotic positioning consistency in production and quality assurance environments. Based on precision laser triangulation and real-time photodetector array sampling, the system quantifies spatial deviation across all three Cartesian axes (X, Y, Z) as well as angular orientation (roll, pitch, yaw) during repeated end-effector positioning cycles. Unlike manual coordinate measuring machine (CMM) or dial indicator methods—which introduce operator variability and require extensive setup—the AC-02 operates autonomously within a fixed U-shaped reference fixture, enabling deterministic measurement traceability aligned with ISO 9283:2014 (Robots and robotic devices — Coordinate measuring systems for industrial robots) and ANSI/RIA R15.06-2012 safety-compliant test protocols.

Key Features

• High-resolution laser displacement sensing with ≤5 µm positional resolution and ±0.01° angular resolution per axis
• Standalone operation via integrated industrial microcomputer—no external PC, driver installation, or network dependency required
• Real-time pass/fail decision logic configurable per axis: user-defined tolerance thresholds (e.g., ±0.05 mm + ±0.02°) trigger automatic classification without manual interpretation
• Multi-cycle data acquisition with timestamped logging; supports ≥100 consecutive test runs with full dataset retention for audit trail compliance
• Universal controller interface: compatible with major robot OEMs including ABB, Fanuc, KUKA, Yaskawa, and Universal Robots via standard digital I/O or Modbus TCP handshake
• Compact, modular U-groove fixture (L × W × H: 420 × 180 × 120 mm) with integrated laser emitter and linear CCD sensor array—designed for floor-standing or bench-mounted deployment
• IP65-rated industrial enclosure housing all electronics, ensuring reliability in factory-floor environments with temperature fluctuations (10–40 °C) and particulate exposure

Sample Compatibility & Compliance

The AC-02 accommodates robotic arms with payload capacities up to 25 kg and repeatability specifications ranging from ±0.02 mm to ±0.5 mm. It supports both serial-link articulated arms and SCARA architectures, provided the end-effector can physically access the U-groove’s 120 mm depth and maintain stable dwell time (≥200 ms) at each target position. The system complies with ISO 9283:2014 repeatability test methodology, including requirements for minimum cycle count (≥30), dwell duration, and environmental stability monitoring. Data records conform to GLP/GMP documentation standards, supporting 21 CFR Part 11–compliant electronic signatures when paired with validated enterprise software extensions (optional).

Software & Data Management

The embedded firmware features a menu-driven UI accessible via 4.3-inch resistive touchscreen. Test configuration includes programmable dwell time, number of cycles (1–200), axis-specific tolerance envelopes, and auto-report generation in PDF/CSV formats. All raw positional traces and statistical summaries (mean, SD, max deviation, Cpk) are stored locally on a removable microSD card (supplied). Optional cloud synchronization enables centralized fleet-level analytics across multiple production lines. Audit logs record user login, parameter changes, test initiation, and result export events—fully traceable for internal QA audits or regulatory review.

Applications

• Final acceptance testing prior to robot shipment from OEM or system integrator facilities
• In-line verification station for high-volume assembly cells producing automotive components, battery modules, or medical device subassemblies
• 72-hour endurance validation under thermal cycling conditions to assess long-term mechanical drift
• Periodic recalibration verification for robots operating in high-duty-cycle applications (e.g., packaging, palletizing)
• Root-cause analysis support when deviations exceed specification—enabling correlation between kinematic model residuals and physical wear indicators
• Supplier qualification programs requiring documented repeatability evidence per ISO/IEC 17025 accredited test reports

FAQ

Does the AC-02 require calibration against a primary standard?
Yes—initial system calibration must be performed using NIST-traceable gauge blocks and angular artifacts prior to first use. Recalibration is recommended every 12 months or after mechanical shock events.
Can the system measure dynamic repeatability during motion?
No—the AC-02 evaluates static repeatability only, per ISO 9283:2014 Clause 6.2. It captures position at rest following commanded dwell time.
Is firmware update capability available over-the-air?
Firmware updates require local microSD card transfer; remote OTA functionality is not supported to maintain air-gapped security in regulated manufacturing zones.
What is the minimum distance between robot tool center point (TCP) and sensor plane?
The nominal working distance is 85 mm ±10 mm; alignment is verified via built-in laser crosshair projection during setup.
How does the system handle vibration-induced noise during measurement?
The embedded signal processing applies adaptive median filtering and motion-triggered acquisition gating to suppress broadband mechanical noise below 10 Hz.