How to Select the Working Parameters of Laser Marking Machines for Medical Instruments

For marking medical instruments, the parameters of the laser marking machine must be chosen with consideration given to the properties of the material being marked, the depth of the mark, and the precision requirements.The power and speed of the laser were adjusted for different materials, such as stainless steel and titanium, and the parameters were validated by testing on small samples. The final validation was done by simulating actual usage scenarios such as sterilization and wiping.By mastering techniques for ensuring the compatibility of materials, the matching of power, and the control of environmental factors, the clarity and durability of medical labels can be assured.

Why is it so important to get the parameters right for medical devices?

Medical device labels must meet stringent requirements for safety and permanence.If the parameters are set improperly, the results could range from blurred or peeling labels to damage to the surface of the device, which would affect the sterilization process and even clinical use.Especially in high-precision products like surgical instruments and implants, the suitability of the parameters directly determines the final quality.

How to adjust the key parameters? Three steps and you ’ re done.

Step 1: Get to know the material's properties.

The absorption rates of stainless steel, titanium alloys, and high-molecular materials are all very different.For example, stainless steel requires a higher peak power, while plastic is easily burned and requires a lower power and higher frequency.I recommend that you first do a small-scale test with scrap material to see how clearly the markings come out and whether the surface of the material is carbonized.

Step 2: Determine the depth of the mark.

Surgical instruments often require deep laser engraving to ensure that the marking will last, while disposable items only require a shallow mark.Generally speaking, the greater the power, the slower the speed, and the deeper the engraving. However, it is important to control the heat-affected zone. Too much power can cause the metal to deform locally.

Step 3: Matching speed and precision.

High-precision patterns require a reduction in marking speed, which in turn affects production efficiency.At this point, don't rush to compromise. Instead, try adjusting the fill distance (by 0.01-0.1 mm) or using pulse mode. This will allow you to improve efficiency while ensuring detail.

It's a practical skill that's often overlooked.

• When the humidity exceeds 60 %, the stability of the fiber laser output will decrease. Remember to dehumidify in advance.

• Different brands of coolant can affect laser life, so it is recommended that you change the coolant as suggested in the manual.

When first using a new model, first record the data from each adjustment, so you can quickly call it up later.

This is the ultimate way to verify the parameters.

After the parameters are set, the product must be tested under three simulated usage conditions: 10 cycles of high-pressure steam sterilization, 50 cycles of wiping with alcohol, and four hours of salt fog testing.Only by passing these tests can it be ensured that the label will remain legible in the clinical environment.