5 Things to Know Before Buying steel cutting laser machine

Choosing a proper sheet metal laser cutting machine is crucial for customers to ensure cutting precision, efficiency and cost-effectiveness during metalworking. With numerous options available in the market, it’s essential to know what to look for. Here are 10 key considerations to keep in mind when you selecting a sheet metal laser cutting machine.

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1. Laser Power
The power of laser is one of the most paramount factors to consider. Laser power, measured in watts, determines the thickness of materials that can be cut and the speed at which cutting can be performed. Generally speaking, the higher power can cut through thicker materials more quickly but tend to be more expensive. For instance, a 1kW laser might be suitable for cutting thin sheets, while 6kW would be necessary for the thicker materials.

2. Cutting Speed
Cutting speed has a direct impact on your productivity. A faster cutting speed means more parts can be produced in a given time. However, the optimal speed depends on the type of materials being cut and thickness. Manufacturers often provide cutting speed charts that can help you choose the right machine based on your specific needs. Here is our comparison chart for your reference.

Comparison Table of Different Laser Powers Between Sheet Thickness and Cutting Speed in SENFENG

Laser power Max thickness of sheet Max cutting speed 1.5kW 12mm 23-30m/min (1mm thick sheet) 3kW 16mm 30-45m/min (1mm thick sheet) 6kW 20mm 45-55m/min (1mm thick sheet) 12kW 40mm 15-18m/min (6mm thick sheet) 20kW 60mm 23-25m/min (6mm thick sheet) 30kW 80mm 23-30m/min (6mm thick sheet) 60kW 100mm 26-30m/min (8mm thick sheet)

3. Cutting Precision and Accuracy
Precision and accuracy are also of great concern, especially for industries requiring intricate designs and tight tolerances. The quality of laser beam and the stability of the machine affect the precision of cuts. Look for machines with high positioning & repositioning accuracy, typically in the range of ±0.03mm. In SENFENG, our machines are usually at the repositioning accuracy of ±0.02mm.

4.Type of Laser Generator

There are several types of laser generator, including CO2, optical fiber and diode lasers. Each has its own advantages and applications:

CO2 Lasers: Good for cutting non-metal materials and thicker metals.

Optical Fiber Lasers: More energy-efficient, faster and ideal for cutting thin, medium and thick metals.

Diode Lasers: Often used for engraving and marking rather than cutting.

Remember to choose the laser generator that best fits your materials and work requirements, instead of pursuing for the more and more high power.

5. Automation and Software Integration
In general, modern laser cutting machines come standard with various levels of automation and software integration. Automation can significantly increase productivity by reducing manual handling and setup time. Look for features such as automated loading and unloading, material handling system and advanced nesting software that maximizes material usage and minimizes waste.

6. Cost of Ownership
The initial purchase price is just one part of the overall costs. Need to consider the total cost of ownership, including maintenance, consumables, power consumption and potential downtime. Fiber laser generator, for example, tends to have lower operating costs compared to CO2 laser generator due to its higher energy efficiency and lower maintenance requirements.

7. Material Compatibility
Ensure the machine is compatible with the types of materials you intend to cut. Different laser generators interact differently with various materials. For instance, fiber laser generator is excellent for cutting metals like steel, aluminum and copper, while CO2 is better for cutting non-metals such as wood, acrylic and plastics.

8. Support and Service
As everyone knows, reliable technical support and intimate service are crucial for minimizing downtime and ensuring smooth operation. Choose a manufacturer or supplier known for excellent customer service, comprehensive training and prompt technical support. Check for available warranties and the ease of getting replacement parts.

9. Space and Requirements for Installation
Take into account of the space available in your facility for the new machine. Laser cutting machines vary in size, and you need to ensure there is enough room for early installation, operation and later maintenance. Some machines require special installation conditions, such as proper ventilation and stable foundations.

10. Environmental and Safety Factors
Laser cutting machines should comply with environmental regulations and safety standards. Give priority to machines equipped with proper exhaust system to handle fumes and dust, and ensure that safety features such as protective enclosures and interlocks are in place. This is particularly important if you are cutting materials that produce hazardous fumes.

During your manufacturing, how to choose the right sheet metal laser cutting machine is essential to keep your cutting at high precision, efficiency and cost-effectiveness. Facing with numerous options available in the market, you also need to know what to look for. Here are 10 key factors to keep in mind when selecting a sheet metal laser cutting machine:

1. Laser Power

The power of a laser cutting machine is a critical factor to consider. Measured in watts, laser power determines both material thickness and cutting speed. The higher power can cut through the thicker materials at a faster speed, but they also tend to come with a higher price tag. For example, 1kW may be suitable for cutting the thinner sheet, while a 6kW or the higher laser (such as, 10kW, 20kW, 60kW) would be necessary for thicker materials up to 100mm. 

2. Cutting Speed

Cutting speed directly impacts productivity. A faster cutting speed allows for more parts to be produced in a given time. Even so, the optimal speed is usually decided by material type and its thickness. Manufacturers often provide cutting speed charts to assist in selecting the right machine based on specific needs.

SENFENG’s Comparison Table of Different Laser Powers Between Sheet Thickness and Cutting Speed

Laser power

Max thickness of sheet

Max cutting speed

1.5kW

12mm

23-30m/min (1mm thick sheet)

3kW

16mm

Contact us to discuss your requirements of steel cutting laser machine. Our experienced sales team can help you identify the options that best suit your needs.

30-45m/min (1mm thick sheet)

6kW

20mm

45-55m/min (1mm thick sheet)

12kW

40mm

15-18m/min (6mm thick sheet)

20kW

60mm

23-25m/min (6mm thick sheet)

30kW

80mm

23-30m/min (6mm thick sheet)

60kW

100mm

26-30m/min (8mm thick sheet)

3. Precision and Accuracy

As for industries needing intricate design and tight tolerance, cutting precision and accuracy are in the first place. Cutting precision may be affected by the quality of laser beam and the stability of the machine. Given this, you need to seek for machines with high repeatability and accuracy within the range of ±0.03 mm.

4. Type of Laser Source

At present, there are including CO2, fiber and diode laser source. Each has its advantages and applications:

CO2 Lasers: Fit to cut non-metal materials and other thicker metals.

Fiber Lasers: Ideal for cutting thin to medium thickness metals thanks to its higher efficiency and cutting speed.

Diode Lasers: Compared with cutting, it is more suitable for engraving and marking.

Choose the laser source that best fits your material and cutting requirements.

5. Automation and Control Software 

Modern laser cutting machines work with various automated and control software. Through the minimization of manual work and setup time, automation helps to enhance your productivity. For that reason, it is necessary to look for automated loading and unloading devices, material handling system and advanced nesting software that optimizes material usage and reduces waste.

6. Cost of Ownership

For customers, the early buying costs are just part of the all-in expenses. At work, they must think about the total cost of ownership made up of maintenance, consumables, electric charges and potential downtime. Fiber lasers, compared with CO2 laser generator, tend to require lower operating costs because of their higher energy efficiency and lower maintenance demands.

7. Good Compatibility with Materials to be Cut

Before purchasing, you must ensure that your preferred machine is compatible with your material type. Different lasers fit for different materials. In comparison with CO2 lasers cutting wood, acrylic, plastics and other non-metals, fiber lasers are better for cutting metals like carbon steel, mild steel, aluminum and copper.

8. Technical Support and Service

To minimize downtime and keep work smooth, the reliable technical support and service are crucial. So, all customers must carefully choose a manufacturer or supplier with excellent customer service, comprehensive training, and prompt technical support. Pay close attention to warranty period available and the ease of getting replacement parts.

9. Installation Space and Requirements

Consider the space available for your new machine in your workshop. Laser cutting machines vary from overall dimensions and footprint, therefore you must ensure there is enough room for installation, operation and maintenance. However, some machines call for special installation conditions, incl. good ventilation and stable foundations.

10.Environmental and Safety Considerations

When choosing a laser cutting machine, it is crucial to ensure compliance with local environmental regulations and safety standards. Look for machines that are equipped with proper exhaust systems to effectively handle fumes and dust. Additionally, verify that safety features such as protective enclosures and interlocks are in place, especially when working with materials that emit hazardous fumes.

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