Jinan Weihua Machinery & Equipment Co., Ltd · Jinan Shandong China
Colour marking produced on metal by a MOPA laser
Application Case

Colour Marking On Stainless Steel Hardware

Standard fiber lasers often struggle to produce vibrant, consistent colors on stainless steel without burning the surface or requiring complex post-processing.

Client Background

Who Runs This Job

A typical buyer for this application is a hardware or electronics manufacturer producing stainless steel components like mobile phone buttons, cases, and gift items. The batch sizes vary from small runs to high volume production, and the parts often require distinct visual identification or branding that must withstand handling.

Challenge

The Problem On The Floor

Standard fiber lasers often struggle to produce vibrant, consistent colors on stainless steel without burning the surface or requiring complex post-processing. Buyers face issues with repeatability when marking small features like 0.2 mm characters or 0.02 mm line widths, leading to rejected parts and inconsistent product appearance across batches.

Pain Points

Pain Points Behind The Enquiry

  • Inconsistent color saturation on stainless steel parts causes customer rejections and rework
  • Standard pulse width lasers cannot achieve the fine detail needed for small electronics
  • Repositioning errors make it difficult to align marks on mass-produced hardware components
  • Deep engraving on thin parts risks deformation or damaging the underlying material
Our Solution

What We Specified

The 30W MOPA laser marking machine from Weihua Laser uses adjustable pulse width technology to control frequency and width independently. This allows for constant high peak power output, enabling precise color marking on stainless steel and black marking on anodized aluminum. The system achieves a reposition precision of ±0.003 mm and a minimum line width of 0.02 mm, ensuring fine details are rendered accurately.

Process

Manufacturing Process

  • Part geometry and logo files are prepared in Beijing EZCAD software
  • The workpiece is placed within the 110mm x 110mm or 150mm x 150mm marking scope
  • Pulse width and frequency are adjusted to match the stainless steel surface requirements
  • The 30W MOPA fiber laser marks the surface at speeds up to 7000 mm/s
  • Marking depth is controlled between 0.001 mm and 0.2 mm to preserve part integrity
  • The air cooling system maintains stable operation during continuous production runs
Supply Chain

Supply And Delivery

The machine is supplied as a complete integrated unit with a desktop computer and industrial computer options. Shipping is handled by sea, air, or international express to ensure the equipment arrives ready for installation. Weihua Laser provides English user manuals and video guidance to support the setup process.

Quality Control

Quality Control

Each machine undergoes testing to verify the ±0.003 mm reposition precision and 0.02 mm minimum line width capabilities. The laser wavelength is checked to remain within 1064 nm ± 1 nm. All components are counted against the packing list, which includes positioning bars, a pedal switch, power cord, and data cable, before the unit is sealed in its 88 cm x 82 cm x 110 cm package.

Outcome

Result

Stainless steel hardware displays vibrant, consistent color marks without surface damage. The ±0.003 mm reposition precision ensures that serial numbers and logos are aligned correctly across thousands of units. Fine details down to 0.2 mm character height are legible and durable, reducing the need for manual inspection and rework.

Customer Benefit

What The Buyer Gains

The MOPA technology expands the range of materials and finishes that can be marked, allowing manufacturers to offer color options on stainless steel without additional printing steps. The compact, integrated design saves floor space, and the air cooling system reduces maintenance compared to water-cooled alternatives.

Samples From This Application

Colour marking produced on metal by a MOPA laser
Laser marked graphics on a metal component

Machines Used

All machines

Laser Marking Machines

30W Mopa Laser Marking Machine

The 30W Mopa Laser Marking Machine uses a JPT Mopa M7 series fiber laser source with adjustable pulse width and frequency to produce color marks on...

Run The Same Job In Your Workshop

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