Frequently Asked Questions

These are some of the most frequently asked questions users have about our laser equipment. Please be sure check if your question has been answered here before submitting a support ticket. If you don’t find your answer here, please leave a message below and we’re happy to help anytime!

Laser Welding

For different materials, choosing different laser power waveforms can also make the welding effect more delicate. Sometimes even materials that cannot be welded by traditional methods can be obtained by changing the laser power waveform.When selecting the laser output power waveform, under the premise of outputting the same laser energy, the wider the duty cycle, the larger the welding spot; the higher the peak output power of the laser output power waveform, the deeper the welding spot. Customers can explore in the application process to explore the laser output power waveform suitable for your products.

Laser Power
The energy delivered per unit of time by a fiber laser. The power of a laser cutting machine determines its cutting or engraving speed, as well as its ability to penetrate or heat materials. Laser power is a physical quantity that measures the output energy per unit time, and it shares the same unit of measurement as electrical power, using watts.

Welding Speed
Welding speed has a significant effect on the depth of fusion. Increasing the speed reduces the depth of fusion, while too low a speed may result in excessive melting of the material and weld penetration. Therefore, there is a range of welding speeds that are appropriate for a given laser power and thickness of a given material, and the maximum depth of fusion can be achieved at the corresponding speed values therein.

Laser Power Density
The prerequisite for deep penetration welding is to focus the laser beam to achieve sufficiently high power density, thus laser power density plays a decisive role in the formation of weld seams. Laser power also controls the depth of penetration and welding speed. For a certain diameter of the laser beam, increasing the laser power deepens the penetration and accelerates the welding speed.

Peak Power
This is a specific term for pulsed lasers and an important performance indicator for pulse lasers. It represents the highest power that can be achieved by a single pulse. The unit is watt (W).

Pulse Frequency
Pulse frequency, beam spot size, and welding speed need to be matched to achieve the desired overlap rate. Generally, a higher overlap rate leads to smoother welds, but it also reduces the welding speed. When the laser pulse frequency exceeds a certain value, the overlap rate becomes too high, surpassing the welding limit of the material, which may lead to burn-through or the formation of welding spatter.

Pulse Width
Also known as pulse duration, it refers to the duration of a single pulse. Therefore, it is a unit of time measured in milliseconds (ms), microseconds (us), nanoseconds (ns), picoseconds (ps), femtoseconds (fs), etc.

Max Pulse Energy
Refers to the laser energy carried by a single pulse and is the product of peak power and pulse width. The unit is joule (J). For example, if the peak power is 10 kilowatts and the pulse width is 100 nanoseconds, the pulse energy E = peak power * pulse width.

Pulse Repetition Rate

Equivalent to the number of pulses repeated within one second, measured in hertz (Hz).
Average power: It is the laser energy output per unit time in one repetition cycle, unit is Watt (W). Output power = pulse repetition frequency * pulse energy.

Defocus Amount

Defocus amount, also known as focus offset distance, pertains to the separation between the focal point of the laser beam and the surface intended for machining on the workpiece. Altering the defocus amount directly impacts the dimensions of the laser spot, consequently influencing the laser energy density within the irradiation region. There are two types of defocus: positive defocus and negative defocus. Positive defocus occurs when the focal plane is above the workpiece, while negative defocus occurs when it is below. With negative defocus, the power density inside the material is higher than on the surface, resulting in stronger melting and vaporization, allowing the light energy to penetrate deeper into the material. Therefore, in practical applications, negative defocus is preferred when a larger penetration depth is required, while positive defocus is suitable for welding thin materials.

Beam Spot Size

The size of the beam spot is one of the most important variables in laser welding as it determines the power density.

Focal Point Position

The position of the focal point is critical in order to maintain adequate power density when welding. Changes in the position of the focal point relative to the surface of the workpiece directly affect the weld width and depth.

In sheet metal laser manufacturing, the quality requirements for welding strength and appearance are different according to different products. Laser welding has a small heat input, and the heat-affected zone is extremely small, which can effectively improve the welding quality and reduce the time for follow-up work. And some internal structural parts or parts that need to be sprayed later have higher requirements for welding strength and welding speed. DP laser welding machine is undoubtedly the best choice.

Dapeng Laser is a laser equipment R&D manufacturer integrating R&D, manufacturing, sales and service. The company covers more than 200 kinds of laser equipments, including laser cutting machine, laser marking machine, laser welding machine, laser engraving machine and laser cleaning machine products. DP Laser is committed to providing customers with laser processing solutions and professional technical support to become a trusted partner. Please contact our technical team online for customized laser equipment solutions and quotes!

When the temperature is low in winter, in order to ensure the normal use of the laser machine and equipment maintenance, antifreeze will be added to the water tank. So, what happens in hot climates? When working in hot weater, as long as the water tank cannot reach the cooling effect, the equipment will alarm and suspend operation. How to avoid similar situations from happening? The water tank is the key, the size of the water tank determines the operating time to maintain normal temperature. The smaller the water tank, the weaker the constant temperature capability, and the water tank larger the stronger, and there is also certain gap in cost. In order to reduce production costs, many manufacturers also equip with small water tanks, which is why there are price differences.

Laser Cutting

Fiber laser cutting machine adopts fiber laser to produce high energy density laser beam, focusing on the surface of the workpiece through the optical system, making the irradiated area of the material quickly melt or vaporize, with the high-speed movement of the cutting head to complete the precise cutting operation.

Fiber laser cutting machine is suitable for cutting a variety of metal materials, including stainless steel, carbon steel, aluminum, copper, titanium and other metal alloys, as well as some non-metallic materials (such as acrylic, wood, leather, etc.), but it is mainly used in the industrial metal manufacturing.

1. The current cutting capacity of laser cutting machines in the industry:
Carbon steel is 36mm. If the 36mm steel plate is made of high-quality materials, the machine performance is good, the graphics are not complicated, and the cutting quality is good. Stainless steel is 25mm. However, mild steel is less than 25mm and stainless steel is 16mm or less.
2. The maximum stroke of the laser cutting machine
There are currently two types of laser metal cutting machines: one is desktop, the general effective cutting range is 1.5 * 3 m, 2 * 4 m; the other is gantry type laser cutting machine, which effective cutting width can be 2~6 meters, and the length can be 10 meters. It has the same structure as flame cutting machine flame cutting machine and plasma cutting machine.
3. Speed and accuracy
If the main cutting board is lower than 6mm, it is recommended to purchase a desktop laser cutting machine that is faster and more accurate than the gantry type.

500W fiber laser cutting machine to cut stainless steel and carbon steel materials, and the thickness is generally about 3mm~6mm.Factors affecting the processing thickness and speed of fiber laser cutting machine:
1. Different materials
The stainless steel material is very hard, generally can be cut into 3mm thick, the surface is very rough and the speed is slow.
2. Related accessories of cutting machine.
3. Equipment maintenance
The laser machine needs regular maintenance, and a good working environment is benefit for the stable operation and service life of the equipment.

Laser Marking

Laser marking is also called laser coloration, charring, or laser dark marking, and is attained when the laser beam changes the surface of the material. A low-powered beam is required to complete this slight alteration of the surface. High contrast marks can be created through laser marking without damaging the material. When laser marking a plastic surface, it can be called “charring,” while annealing is commonly used for laser marking metals. There are four main types of laser marking.


Fiber Laser Marking Machine Application

Primarily suitable for most metal materials such as stainless steel, aluminum alloy, copper, iron, titanium, etc. It can also be applied to certain specific non-metal materials.

CO2 Laser Marking Machine Application

  • Ideal for paper, leather, fabric, organic glass, epoxy resin, wool fabrics, plastics, ceramics, crystals, jade, bamboo products, and more.
  • Widely utilized in various industries including electronics, food packaging, beverage packaging, pharmaceutical packaging, garment accessories, leather goods, textile cutting, handicrafts, rubber products, shell nameplates, furniture, and others.

UV Laser Marking Machine Application

  • Especially suitable for fine processing in the high-end market.
  • Used in tasks such as marking and scribing flexible PCB boards, processing silicon chip micro-holes and blind holes, marking QR codes on LCD glass, drilling holes on glass vessel surfaces, coating marking on metal surfaces, plastic buttons, electronic components, and complex silicon chip graphic cutting.
  • Marking plastics (such as ABS, PC, PP, PE, etc.), glass crafts and glassware, ceramics, rubber, paper, fibers, and other materials.
  • Due to its “cold” processing characteristic, it enables high-quality marking on sensitive materials without causing deformation.


Metal laser engraving machines are generally fiber laser engraving machines. The wavelength of this fiber laser machine is 1064nm, which can be absorbed by metals and some non-metals. Its effect on metals is very obvious. By adjusting the parameters, it can print black and white content and the power of the laser. Metal laser engraving machines can also engrave some plastics, but the effect is not ideal, because plastics are heat-sensitive materials, the content printed by this machine will not fine enough. The plastic laser marking machine is actually an UV laser engraving machine. The light it emits is purple, so it is also called a purple light machine. It is mainly used for laser engraving on various plastic, wood, fabric and non-metals products.

Flying laser marking machine is a laser marking equipment that incorporates an assembly line device. It is capable of performing dynamic, continuous laser marking operations while the product or material is moving at high speed. Through advanced dynamic focusing technology and high-precision synchronization control system, the flying laser marking machine can accurately project the laser beam onto the surface of the fast-moving workpiece to form a permanent mark.

This type of marking equipment is particularly suitable for production lines that require large quantities, continuous marking, and is especially suited for high-speed flow assembly line operations. In contrast, ordinary laser marking machines are more suitable for small quantities and many varieties of products.

Visual positioning laser marking machine is a laser marking equipment integrated with a high-precision CCD visual position system. It automatically adjusts the laser marking path by capturing and accurately recognizing the position, angle, shape and other features of the workpiece to ensure accurate and consistent laser marking on complex shapes, irregularly arranged or non-fixed position workpieces.

CCD visual position laser marking machine often combined with on-the-fly marking machine, the vision positioning system identifies and tracks specific features or markings on the workpiece to achieve accurate laser marking on the surface of the workpiece moving at high speed, improving productivity and product quality.

Laser Cleaning

Laser cleaning machine uses high energy density laser beam to irradiate the surface of the object to be cleaned, through the instantaneous thermal effect to make the pollutants such as rust, coatings, grease, etc. rapid thermal expansion, vaporization or decomposition, and then through the auxiliary gas blowing off or natural shedding, so as to achieve high efficiency and accurate cleaning.

  • Non-contact cleaning, which does not damage the substrate.
  • Precise and controllable, allowing targeted cleaning of complex structures and fine components.
  • High efficiency, 3~5 times more efficient than traditional cleaning, significantly reducing cleaning time and costs.
  • Environmentally friendly with no chemical residues.
  • Suitable for various materials, especially ensuring the safety of sensitive and precious materials.

Laser cleaning machines are suitable for a wide range of materials and industries, particularly effective for cleaning metal surfaces such as carbon steel, stainless steel, aluminum alloy, galvanized sheet, copper, and various alloy surfaces.

They can safely and effectively remove various contaminants from metal & non-metal surfaces:

  • Metal rust, oxide layers, coatings, and plating.
  • Paint, coatings, and other organic substances on the surface.
  • Grease, resin, adhesive, stains, dust, and production residues.
  • Removal of oil stains from precision components, such as electronic components, automotive parts, and molds (such as tire molds, electronic molds, and food molds).
  • Paint stripping and rust removal in aerospace, weapons, shipbuilding, and maintenance processes.
  • Cleaning surfaces of non-metal materials such as stone, glass, and ceramics.
  • Cleaning of cultural relics, artworks, and building facades.
  • Metal surface cleaning in confined spaces.

🌟Q1: How do I know which model is suitable for my application?
You just send us the following information and then we can offer you a suitable solution.
In addition, you can also send me your sample and we will arrange professional engineers for proofing & evaluation.
1) What is your product? material? thickness? required accuracy?
2) What is the current production process?
3) What is your budget and delivery time?

🌟Q2: What should I do if I don’t know how to use the machine?
We will send video tutorial of both installation, operation and the English manual. If you have further questions, we have engineers can serve you online. And for some countries, like in India, Malaysia, Korea, Spain, we have local support team provides door-to-door service.

🌟Q3: How can I do if the machine goes wrong?
We guarantee machine quality for 13 months, during this period, if spare parts of the machine were not man-made damaged, we can send the component to the customer in best delivery. Besides guarantee period, we still provide you free online services for life. If parts broken, you can order replacement parts from us.

🌟Q4: Can I customized my equiment?
Yes, we customize models and adjust process settings and specific assembly line designs according to customer needs. The components of our laser equipment have different brands and parameters, you can consult our engineers to choose the best configuration. You can freely choose the standard configuration and optional configuration of the machine.

🌟Q5: What is the delivery time?
Generally standard machine, our lead time is 2-7 days after PO confirmed. Customized product need a little longer. The shipping time depends on the shipping method, generally there are sea, rail and air.

🌟Q6: Will the package damaged during transportation?
Our package is considerate all the damage factors and make it to be safe, and our shipping agent have full experienced in safe tranportation. We have exported to 80 countries worldwide. So please don’t worry, you will receive the parcel in good condition.

🌟Q7: What guarantees do your products have?
We are a professional laser equipment manufacturer with nearly 500 employees and the volume of business reached 100 millions USD in 2021. ISO 9001 certification, and most of the products have passed the CE/SGS/FDA certification. All factory machines will come with machinery test report and video outgoing-inspection.


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