How to Add Lead-in Lines in XCS
Updated Jun 13,2025
Updated Jun 13,2025

Why do I need to add lead-in lines?

In laser metal processing, excessive heat concentration occurs when the cutting starts or stops at a point, leading to degraded cutting quality. Lead-in lines redirect the actual start/end points to the scrap area, ensuring defects occur on waste material. Additionally, adding lead-in lines helps maintain cutting stability and improves processing efficiency.

Scenarios requiring lead-in lines:

  1. Cutting thick metals (≥3mm) with enclosed contours (e.g., circles, squares)
  2. Processing highly reflective materials (e.g., aluminum, brass)
  3. When high-precision patterns are required, especially to avoid defects at closure points, even for thin metals.

Recommended lead-in Line parameters:

  1. Length: Typically 1–3 times material thickness (range: 3–10 mm)
  2. Angle: 30°–45° relative to the tangent direction, don't set the lead-in lines too close to the patterns.
 

How to set lead-in lines in XCS?

The XCS software supports automatic addition of inner/outer lead-ins; you just need to set the lead-in length for automatic generation.

You can also add them manually.

Lead-in lines and soft-start function

Generally, lead-ins are associated with the soft-start feature.

For stainless steel, brass or aluminum≥3mm, it is recommended to enable the soft-start function after setting the lead-ins to ensure cutting quality. The soft-start distance should not exceed the lead-in length, and the speed is typically set to 5mm/s.

All these settings will be applied automatically after you add the lead-in lines and choose corresponding materials.

The soft-start height is related to the material thickness; after setting the thickness, it will automatically suggest a recommended height. When using the SaveGas nozzle (telescopic nozzle), please set it to 4.5mm.

Note: For thick carbon steel and galvanized sheets, lead-in lines are required while the soft-start function is optional.

 
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