Rotary Encoders (ERN)

Description

1. Product Overview

The Rotary Encoders (ERN) series represents a precision opto-asynchronous measurement system engineered for closed-loop motion control in high-performance industrial automation. Primarily used for position and speed feedback in servo drives, CNC machine tools, and robotics, the ERN delivers unmatched signal stability and angular resolution. Its strategic value lies in reducing machine downtime and improving manufacturing tolerances—directly translating to higher overall equipment effectiveness (OEE) for global production lines.

2. Key Specifications & Technical Characteristics

• Material composition: Glass disk with chrome oxide graduation (thermal expansion coefficient < 8 ppm/K); aluminum alloy housing (DIN 1725); stainless steel shaft (AISI 303)

• Purity / Grade: Industrial opto-ASIC grade; signal error < ±20 angular seconds

• Physical characteristics:

  • Form: Self-contained bearing-mounted rotary encoder

  • Color: Silver anodized housing; transparent optical-grade cover

  • Diameter: 58 mm (standard flange)

  • Shaft diameter: 6 mm or 10 mm solid/hollow

  • Mass: 0.18 – 0.22 kg (depending on termination)

  • Density (packed): 450 kg/m³ (storage volume)

• Packaging options: Anti-static ESD blister tray + vacuum-sealed foil + industrial carton (10 units per carton); desiccant included

• Shelf life: 5 years in unopened, controlled environment (20 ±5°C; <60% RH)

3. Core Industrial Applications

• Machine tool (CNC milling/lathe): Direct axis positioning feedback — ERN outperforms resolvers by offering 10× higher interpolation resolution (up to 16384 ppr), enabling micron-level cut accuracy.

• Industrial robotics (6-axis & SCARA): Joint angle verification — optical scanning eliminates magnetic hysteresis, improving repeatability to ±2 arcsec vs ±10 arcsec for magnetic encoders.

• Semiconductor pick-and-place: High-speed rotation monitoring (up to 12,000 rpm) — low inertia (≤10 g·cm²) allows faster acceleration/deceleration cycles without overshoot.

• Packaging (labeling & filling lines): Synchronous speed control — differential output (RS-422) resists electrical noise from nearby VFDs, a common failure point for incremental TTL encoders.

4. Competitive Advantages

• Quality consistency: Zero signal dropout guarantee across 100% automated optical test (AOI) at 3 temperature points (−10°C / 25°C / 85°C); lot-to-lot variation < 0.5% of rated resolution.

• Supply reliability: Dual-source wafer lithography (Germany and Japan) protects against single-region disruption; 98% on-time delivery for consignment stock (CT: 15 working days).

• Logistics capability: Regional hub stocking (NA, EU, ASEAN) with 24-hour emergency drop-ship for critical spares.

• Price competitiveness: Tier-1 performance at 78% of leading European OEM price due to automated winding assembly (no manual soldering errors).

• Sustainability: Lead-free soldering (RoHS3 compliant); 95% aluminum recyclable by mass; packaging reduced by 32% vs industry avg.

• Technical support: Lifetime access to digital twin calibration files (DXF/STEP) + 24/7 engineering hotline for encoder tuning.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): BULK 20 metric tons
  (Equivalent to approximately 105,000 units — based on 0.19 kg net unit weight plus packaging)

• Loading capacity: 20 MT per standard 20-ft dry container (palletized: 22 EUR-pallets, max stack height 1.2 m)