Articles on: Learning & FAQ

How to Measure the Actual Current Value When the Driver Is Running?

First of all, it should be noted that our company's driver uses subdivision technology, and the current of the subdivision driver changes in a sinusoidal waveform when it is running, so it is meaningless to measure the current value of the driver when it is running. Of course, we can provide measurement methods, the following are for reference only.

To measure the sine wave current output by a stepper driver, you can use the following steps:

1. Prepare measurement tools: You need to use a suitable current measurement instrument, such as an ammeter, oscilloscope or special current sensor.

2. Connect the measuring instrument: Correctly connect the current measuring instrument to the output of the stepper driver in order to measure the passing current.

3. Set up the measuring instrument: Set the appropriate range and measurement mode according to the type and function of the measuring instrument. If using an oscilloscope, AC coupling mode can be selected to measure AC current.

4. Measure the current: Start the stepper driver and stepper motor and let them run to a stable state. The current waveform is then recorded or monitored in real time using a measuring instrument. If you use an ammeter, you can read the current value directly. If you use an oscilloscope, you can observe the current waveform and measure its amplitude.

It should be noted that when measuring sine wave current, you should ensure that the range of the measuring instrument is large enough to avoid inaccurate measurement results caused by the current exceeding the measurement range. In addition, attention should be paid to safe operation and ensuring proper connection and insulation to avoid the risk of current leakage or electric shock.

The application of sine wave current drive in subdivision drives has the following reasons:

Smooth motion: Sine wave current can achieve smooth current changes, thereby reducing the vibration and vibration of the stepper motor during motion. This is very important for applications that require high precision and smooth motion, such as CNC machine tools, precision instruments, etc.

Reduce resonance noise: Sine wave current can reduce the resonance noise between the stepper motor and the driver. Resonance noise is due to between stepper motor and driver
It is caused by the uneven current waveform. Using sine wave current can reduce the generation of this noise.

Improve subdivision accuracy: Sine wave current drive can control the position of the stepper motor more accurately. By breaking each step into smaller micro-steps, you can achieve
Achieve higher resolution and more precise position control.

The reason why the subdivision driver uses sine wave current is to improve the smoothness and accuracy of the stepper motor's movement. Subdivision driver can convert each stepper motor
Steps are broken down into smaller microsteps, allowing stepper motors to move with higher resolution.

Updated on: 14/09/2023

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