- Manufacturer: KOYO (JTEKT Corporation)
- Series: TRD-NA / TRD-NA720 (e.g., TRD-NA720NW, TRD-NA720NW5M, etc.)
- Device Type: Absolute Rotary Encoder (Gray Code, 720 CPR resolution)
KOYO TRD-NA series absolute rotary encoders are heavy-duty position feedback sensors widely integrated into packaging machinery, printing presses, automated material handling, and CNC equipment. They provide instant absolute position data without requiring a homing sequence after power cycles.
Continuous exposure to mechanical vibration, dust, moisture, and electrical transients can cause bearing wear, optical alignment drift, LED emitter degradation, or output stage failure.
What we repair on KOYO TRD-NA720 encoders:
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Output Stage & Drivers: Replacement of damaged transistor output arrays (NPN / PNP / Open Collector) caused by wiring short circuits or voltage spikes.
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Optoelectronic Assembly: Cleaning, realigning, and replacing degraded IR LED emitters and photodiode arrays to ensure crisp signal transitions from the optical disc.
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Power Supply & Cabling: Repair of internal voltage regulator circuits, damaged flying leads, connectors, and cracked PCB solder joints.
Benefits of our repair service:
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No Mechanical Modifications: Repairing the original unit avoids custom mounting brackets, shaft adapter bushings, or coupling adjustments.
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100% Control System Compatibility: Preserves exact Gray code timing and CPR resolution, eliminating the need to modify PLC parameters or position decoding logic.
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Thorough Signal Verification: Every repaired encoder is tested for signal integrity, phase accuracy, and code continuity.
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