LP4 Laser Focusing Instructions – LaserPecker

Why is Focusing Necessary?

For Laser engraver, lenses are often used to focus the laser beams. The laser beam will be refracted or reflected when passing through the lens, its direction and focus will then be altered.

Without proper focusing, the laser beam may defocus, bringing unclear, blurry, or uneven engravings.

Proper focusing will ensure the laser beam gathers on the right point, concentrating its energy at the focus for high-quality engravings.

Focusing Range of LP4

See the table below:

	Electric Stand Only	Electric Stand with Riser Pad
Focusing Range from the Base Plate	124mm - 244mm	174mm - 294mm
Supported Material Thickness	0mm-94mm	24mm-144mm

Focusing-related Values

LP4’s recommended focusing distance is 150mm.

Press the electric stand button to rise or drop 0.5mm.

press and hold for continuous rise or drop.

Note: When using add-ons like rotary extension or slide extension, their thickness will impact the focusing range. It’s recommended to use with a riser pad for correction.

LP4 Focusing Principle

LP4 uses dual red lights for focusing. Next to the laser field lens, there are two apertures emitting the red light, converging at 150mm from the field lens.

Based on such focusing principle, when both red lights hit the material to be engraved simultaneously, two red dots will be generated. If the material is exactly 150mm from the lens, two red dots will merge into one brighter dot, indicating successful focus.

Focusing Methods

In practical use, three focusing methods are available based on different scenarios:

Red Light Focusing, Measurement Focusing, Protection Cover Focusing.

1. Red Dot Focusing

Adjust the electric stand’s height to overlap two red dots coincide on the engraving material, based on LP4 focusing principle.

2. Measurement Focusing

Measure the distance between the field lens and material to be engraved with a ruler, then adjust the height of electric stand until the lens is 150mm from the material.

3. Protection Cover Focusing

Install the protection cover, and adjust the electric stand’s height right until the cover’s bottom reach the material to be engraved. Focusing is then successful.