In processing modes such as "Process on flat surface", "Roller — Use rotary attachment", and "Chuck — Use rotary attachment", surface engraving cannot be performed on glass materials including glass cups and glass plates. Additionally, when engraving large pieces of glass, certain areas may be impossible to engrave.

Possible causes

• The laser is improperly focused.
• The glass material you are using is not compatible with surface engraving.

Solutions

For small glass pieces (typically within 100 mm)

1. Ensure that the field lens installed in the machine is the surface engraving lens (with a black outer surface).
2. Ensure that the processing parameters are closely align with those we recommend.
3. Glass materials are highly sensitive to focusing. Therefore, try adjusting the focal point to ensure accuracy.

Recommended glass surface focusing methods:

(1) Auto-focus: Place a thin object, such as paper, over the transparent object to make the measured object no longer transparent, allowing the auto-focus function to work again. Note that you need to subtract the thickness of the thin object after focusing.

(2) Focusing through measurement: If the thickness of the transparent object is known, directly input the thickness of the transparent object.

4. If surface engraving continues to fail, try testing with glass materials purchased from our official website. Not all types of glass are suitable for surface engraving; for instance, quartz glass and borosilicate glass may not be engravable.
5. If the focal point is accurate, you can adjust the focal length by slightly lowering the focal point by 1–2 mm to achieve better focusing results.

For large glass pieces (typically exceeding 100 mm)

The focal plane of the field lens inherently has a certain degree of field curvature distortion. If some areas cannot be engraved during surface engraving, it is recommended to increase the number of processing passes and gradually lower the focal height with each pass (for example, lower the focal point by 1–2 mm) to achieve optimal surface engraving results.