Install the module height adjuster on the z-axis, and adjust the module height and focus by adjusting the M5 Allen key to slide the module up and down.




Please do not leave the equipment when the equipment is working, long-term stay may cause the material to burn!

Please wear protective glasses before operation!

Please do not touch the laser outlet with your hands. It may burn your hands!

Please avoid strongly impact on the machine!

Children under 14 years of age are prohibited from using this product!

Children over 14 years of age need adult supervision when using this product!

Avoid accidental touch by pets!

Adjust Focus

NEJE A40640 is currently the laser module with the best engraving efficiency. The pulse density and knife shape design are especially suitable for high-efficiency engraving. Compared with the same type of laser module, the engraving efficiency is 200% higher. Even under low light conditions, you can hear the focus plasma The sound of hitting, A40640 is also capable of cutting tasks within 20mm, and has a more efficient cutting ability within 8mm.

The NEJE A40640 module is an adjustable focus module. For the consistency of testing, the NEJE factory adjusts the module to 55-70mm focal length by default. This focal length is not the best carving and cutting focal. This focal length is generally not commonly used. When you are suitable for the first use of the product, it is recommended to use a flat-head screw to adjust the focal length to about 10-20mm, which is 10-20mm away from the light baffle. This focal length has a very high focal power density and can directly engrave grayscale stainless steel images\ gray-black stone and other hard materials, NEJE A40640 can directly engrave 3D hardwood and other materials, and does not require air assistance, due to the high energy density design, A40640 can directly vaporize general wooden materials during the engraving and cutting process, so it is also unecessary to add air assist.


Low Light Adjustment

Set the right low light to find the focus more accurately.

Adjust the suitable low light through the software. The NEJE mode can be adjusted in the “Settings” column of the NEJE Win software; the GRBL mode can be adjusted in the “Grbl Configuration” of the laserGRBL software, which has been explained above.

Put a gray cardboard on the surface of the white material (such as plywood) as a focus reference to find the precise focus. A fine focal point can be observed through the protective goggles or the shade of the module.


Laser & Material Database

Max Cutting depth < 20mm

Typical Material Parameters:

woodboard Carving (0.3mm deepth)

Focus on the surface.
Speed (mm/min): 6000
Max Power(%): 100
Bi-directional fill:ON
Line Interval(mm):0.4 (Line per Inch 63.5)
Air Assist: OFF
Number of Passes: 1

Cedar Board Cutting 8mm

Focus under the surface 2mm.
Speed (mm/min): 300
Max Power(%): 100
Air Assist: ON
Number of Passes: 1

About air assist

When do you need air assist

Air-assisted engraving or cutting can only be used for engraving or cutting that produces more carbonized substances. Generally, the depth of engraving is less than 1mm, and the cutting of plywood less than 2mm does not require air assist. A small fan can be used to blow off the smoke generated by the engraving. Air assist is not recommended when engraving images, and adding air assist at this time will destroy image details.

What kind of air pump is suitable for cutting

The main meaning of air assist is to blow off the carbonized material produced by cutting, and the general oxygener and electromagnetic inflator have almost no meaning. only the pressure of the oil pump and air compressor (0.4-1.5mPa) has the effect of blowing away the carbonized material. but it should be noted that the air of the oil pump contains oil and cannot be directly used for the air-assisted module of the closed cavity, otherwise the oil will contaminate the lens, resulting in power drop or damage to the lens. The air pressure of the air compressor can be used for a short time with the closed cavity, but When used for a long time, the water-containing gas will contaminate the lens, cause the power to drop, and even damage the lens.


Radiator Size:	40 x 50 x 60 mm
Weight:	204g
Speed of the Fan:	10600RPM(Double ball bearing)
Interface:	PH2.0 4Pin
Drive Design:	Built-in  
Input:	12V 4A 
Optical Power:	12W 
Wavelength:	450nm
Laser Class:	Class 4
Number of Diodes:	2
Light Source:	2xLD+fiber + FAC Tech + C-Lens
PWM Input:	VPP(3.3-12V), Recomend 1KHz, 
Quiet Design:	Drive the built-in control ic, judge the working state and adjust the fan work.
Max Cutting & Carving Depth:	20mm (The data is tested by NEJE users, and it needs to be done under more accurate focusing and adding correct and certain strength of air assist.)
Brushed Stainless Steel Carving:	Yes
Mirror Stainless Steel Carving:	Yes


12V: Power positive .

GND: Power ground or power negative.

TTL/PWM: TTL = PWM, input 3.3V~12V to turn on laser module, conect to GND to turn off laser module.

Temperature: do not connect, please ignore.

Connect 12V and GND pin to 12V power, ensure the power adapter is sufficient, 5A is recommended.

Connect TTL/PWM pin to your control board PWM output pin.


Control Board

Multi-interface adapter board:


NEJE PWM Control Borad with Temperature Display:



Although this module adopts internal air-assisted design, long-term use may not prevent dust or a small amount of smoke from affecting the lens. It is recommended to clean the lens with a clean cotton swab. Dust or smoke may overheat the lens and cause the lens to burn out. Re-acquire the lens Will delay your use.

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