Digital guide
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Technical Specifications:
| Parameter | Value |
|---|---|
| Encoder Type | Incremental Optical |
| Resolution (Standard) | 1280 PPR (5120 Edges ×4) |
| Resolution (Optional) | 2500 PPR (10000 Edges ×4) |
| Output Signal A | HTL (Line Driver), 5 V DC |
| Output Signal B | HTL (Line Driver), 5 V DC |
| Zero Pulse (Z) | 1 Pulse Per Revolution, HTL |
| Supply Voltage | 5 V DC ±5% (Typical 4.75 V to 5.25 V) |
| Maximum Output Frequency | 500 kHz |
| Operating Temperature | -20°C to +85°C |
| Protection Rating | IP67 (Connector Side) |
| Cable Length (Standard) | 3 m (Shielded Twisted Pair) |
| Weight | Approximately 0.15 kg (Encoder Unit Only) |
Functional Features:
- High-Resolution Position Feedback — Enables sub-micron positioning accuracy when paired with BM4 servo drive
- Quadrature Output (A/B/Z) — Supports bidirectional counting and index pulse for homing
- HTL Output Compatibility — Noise-immune signal transmission up to 100 m cable length
- Low Jitter — Signal jitter < 20 ns for high-speed applications
- Wide Operating Temperature Range — Suitable for harsh industrial environments
- Plug-and-Play Integration — Direct M23 connector mating with BM4 motor
Structure & Material Composition:
- Encoder Disk: Glass Scale (Chrome-on-Glass), 50 mm Diameter
- Sensor Head: LED + Photodiode Array (Differential Detection)
- Housing: Aluminum Alloy, Anodized Black
- Shaft Coupling: Flexible Coupling (Bellows Type, Zero Backlash)
- Cable: Shielded, Oil-Resistant PUR Jacket
Working Principle:
The optical encoder disk is mounted on the motor shaft and rotates synchronously with the rotor. An LED emits light through a coded glass scale, and a photodiode array detects the light/dark pattern, generating quadrature square wave signals (A and B) with a 90° phase shift. The Z pulse provides one index pulse per revolution for reference positioning. The servo drive counts these pulses to calculate real-time position and derives speed via frequency measurement, enabling closed-loop servo control.
Applicable Industries:
- All BM4 Series Servo Motor Applications
- Retrofit Encoder Replacement
- Custom Machine Integration
Installation Requirements:
- Mounting: Directly coupled to BM4 motor shaft via flexible coupling
- Alignment: Maximum 0.02 mm eccentricity, 0.01° angular misalignment
- Cable Routing: Separate from power cables (minimum 100 mm separation)
- Grounding: Shield connected to PE at drive end only
Usage Precautions:
- Do not exceed maximum supply voltage of 5.5 V DC — will damage encoder electronics
- Do not apply mechanical shock exceeding 50 g
- Ensure flexible coupling is installed — rigid coupling causes encoder disk damage
- Replace encoder cable if shield continuity is broken
