¶ What is a Power Adapter?
A power adapter is a device that converts alternating current (AC) into direct current (DC) to power your NEJE device.
Below is a picture of a common power adapter.
Its output voltage is 12V, and it can provide a maximum current of 2A.
¶ What are the Parameters of a Power Adapter?
¶ Voltage
The voltage of the power adapter must match your device. NEJE 1/2/2S/3 series devices can all be powered with 12V.
Some NEJE devices are equipped with the E80 module, which requires 24V power. A 12V power supply can start the control board, but cannot operate the laser module.
¶ Current
The output current of the power adapter should be equal to or greater than the current required by your device. The following is a list of recommended power adapter parameters:
NEJE 1/2/2S/3 + 20W or below laser module =====> 12V 3A or higher
NEJE 1/2/2S/3 + 30W or higher laser module =====> 12V 4A or higher
NEJE 3/4 + 30W or higher laser module + M7/M8 =====> 12V 5A or higher
¶ What Happens When the Power Adapter Output Current Does Not Meet the Requirements?
When the power required by the device is greater than the current provided by the power adapter, the power adapter will reduce the output voltage or completely shut off the output. This will prevent your device from functioning normally or cause it to behave strangely.
¶ Complete Shutdown of Output
When you start a task and the laser turns on, the laser power is strong but quickly extinguishes, often accompanied by the device turning off and then back on.
This happens because the laser requires a large current to operate. When the current needed by the device is greater than the maximum current the power adapter can provide, the adapter detects overcurrent and shuts off the output. It usually restarts the output in about 1 second. If the overcurrent condition persists, it will quickly enter an overcurrent protection state, and this cycle will repeat.
¶ Reduced Voltage Output
Some power adapters, when encountering a demand current greater than the maximum current they can provide, will not completely cut off the output but will reduce the output voltage. As the output voltage decreases, the device's demand for current decreases as well. This may not produce noticeable abnormalities but could reduce the output power of your laser module. Be aware of this situation.
¶ How to Determine if a Power Adapter is Working Properly?
¶ NEJE 3 / 4 Series Devices
Please open the Troubleshooting Center for a power test，After the test is completed, it will tell you the result.
¶ NEJE 1 / 2 / 2S Series Devices
If your device powers off and restarts at the moment the laser starts working, it means your power adapter cannot provide enough current. You need to replace it with one that has a higher current.
Try operating your device in the maximum current consumption mode, such as running the laser at full power + stepping motor locked or moving very slowly (stepping motor locked current is higher than running current). Try measuring the output voltage of the power adapter at this time. If the output voltage drops significantly, it means the current of your power adapter is insufficient. Generally, a drop of 0.5V is recommended, with a maximum drop of 1V.
¶ Can an Oversized Power Adapter (e.g., 12V10A) be Used to Power NEJE Devices?
Yes, this will not damage your device. Please ensure that your power adapter has a short circuit protection feature.
¶ Things to Consider When Purchasing a New Power Adapter
Please do not use inferior quality power adapters, as they often have the following problems:
¶ Large Output Voltage Error in Inferior Quality Power Adapters
Inferior quality power adapters output a voltage with large voltage ripple, which can cause your device to malfunction, such as communication errors.
¶ Insufficient Output Current in Inferior Quality Power Adapters
Inferior quality power adapters cannot provide the current they claim. For example, a poor quality 5A power adapter may not be able to provide 4A of current, which can cause your laser output power to decrease.
¶ How to Distinguish Inferior Quality Power Adapters?
Inferior quality power adapters are usually cheaper, lighter in weight, and have a rough exterior material.
¶ Recommend Purchasing Power Adapters from the NEJE Official Store
If you are unable to judge the quality of a power adapter, we recommend purchasing it from the NEJE official store. All power adapters we sell have been tested by engineers. Click this link to buy.