NTN K-ECG25 K-ECJ45 Vibration Frequency Variable Controller User Manual

About this manual

This manual provides simplified instructions for operating NTN’s small-sized frequency variable controllers, specifically the K-ECG25 (2A) and K-ECJ45 (4.5A) models. It covers installation of vibration sensors, wiring diagrams, function settings (J and H groups), and adjustment methods for constant voltage, constant amplitude, and resonance point tracking modes. Safety precautions and troubleshooting are referenced to the full operation manual. The document is version 02.0 and applies to controllers manufactured after July 2013.

What's inside

• Installation of Vibration Sensor
• Wiring Diagram
• Function Settings (J Group)
• Function Settings (H Group)
• Adjustment Methods
• Troubleshooting

Specifications

Frequently asked questions

What are the available models and their control capacities?

The models are K-ECG25 (2A) and K-ECJ45 (4.5A).

How do I adjust the frequency for constant voltage mode?

Start at the initial frequency (140Hz for ECG25, 70Hz for ECJ45), then gradually lower it using the down key until the vibration amplitude stabilizes at the resonance point.

What is the default feedback mode at shipment?

The default mode is constant voltage mode.

How do I set the polarity of the vibration sensor?

Use function JO7 to reverse polarity if the sensor’s arrow mark cannot align with the work’s forward direction.