What You See
The edge of the engraved image is unclear compared with the other areas.
In some cases, you may also find the sharpness uneven across the engraved image.
Why it Happens
This is related to the nature of the field lens and the galvanometer.
- The transmittance around the field lens' edge is lower than that of the center.
- The reflectivity of the galvanometer differs at different angles when it deflects the laser.
As a result, less power is transferred to the material's surface, leading to a less clear engraving.
Note: Different material has its own sensitivity to the laser. For material with higher sensitivity, it's easier to get engraved, and less affected by the said phenomenon, and vice versa. For example, paper and wood are more sensitive than aluminum and copper.
What to Do
Adjust the processing parameters so that more power can be transferred to the material.
Follow the steps below to determine the most suitable parameters for your material.
For vector image
When you select the image, the right panel pops up.
You will find the following parameters to adjust:
- Increase the power.
- Lower the speed.
For bitmap image
When you select the image, the right panel pops up.
You will find the following parameters to adjust:
- Increase the power range.
- Increase the dot duration.
