DPI, LPI, and Line Interval in DithX

The Core Concepts: DPI vs. LPI vs. Interval

DPI measures image density: how many dots fit in one inch.

LPI measures line density: how many engraving lines fit in one inch.

Line Interval measures the physical gap between engraving lines in millimeters. In DithX you can set these values to match your laser and material.

In laser engraving, they are mathematically locked: high DPI = small Interval.

Use this formula to convert between density and distance:

Interval (mm) = 25.4 ÷ DPI

127 DPI = 0.200mm

254 DPI = 0.100mm

318 DPI = 0.080mm

423 DPI = 0.060mm

Your ideal Line Interval should match your laser's focused spot size.

Gaps appear between lines, causing banding.

Lines overlap, which can cause overburn or blur.

Matching the interval to the spot size produces the sharpest result.

Wood Avoid overburn 254 - 318 DPI (0.08 - 0.10mm)

Slate High contrast 318 - 423 DPI (0.06 - 0.08mm)

Glass / Acrylic Detail focused 318 - 600 DPI (0.04 - 0.08mm)

Coated Metal Sharp removal 318 - 423 DPI (0.06 - 0.08mm)

Note: DithX works only on PC and laptop. After free registration you receive your lifetime license immediately.