How to Adjust the Light Path of the Laser Cutting Machine?

Laser cutting is to focus the laser beam through the focusing mirror to gather a small light point and project it onto the metal surface.

How to Adjust the Light Path of the Laser Cutting Machine? 1

The focal point reaches a high power density.

At this time, the irradiated part of the material is quickly heated to the vaporization temperature and evaporates to form a hole.

With the relative linear movement of the beam and the material, the hole will continue to form a very narrow slit, so as to achieve the purpose of cutting materials.

How to Adjust the Light Path of the Laser Cutting Machine? 2

When the laser cutting machine works for a long time, the optical path will deviate, which will affect the cutting effect.

Related reading: 9 Factors Affecting Laser Cutting Quality

Only the perfect cooperation of laser tube, reflector frame (A, B, C), focusing lens and corresponding adjustment device can achieve the best effect and produce the best product, which is the core part of using laser cutting machine.

Related reading: 6 Practical Functions of Laser Cutting Machine

Therefore, it is necessary to check the optical path and adjust it regularly.

Components and structures

Reflector frame A

How to Adjust the Light Path of the Laser Cutting Machine? 3
  • 1. Optical target placement rack
  • 2. Reflector
  • 3. Tension spring locking screw
  • 4. Adjusting screw
  • 5. Adjusting nut
  • 6. Locking screw a
  • 7. Locking screw b
  • 8. Adjusting screw M1
  • 9. Mirror locking piece
  • 10. Adjusting screw M
  • 11. Adjusting screw M2
  • 12. Tension spring
  • 13. Mounting plate of reflector
  • 14. Support plate
  • 15. Base

Reflector frame B (its mounting base plate is different from that of mirror frame A and the rest are the same).

How to Adjust the Light Path of the Laser Cutting Machine? 4
  • 1. Install the bottom plate (movable left and right)
  • 2. Locking screw

Reflector frame C

How to Adjust the Light Path of the Laser Cutting Machine? 5
  • 1. Mirror adjusting plate
  • 2. Reflector
  • 3. Locking screw
  • 4. Adjusting screw M1
  • 5. Mirror adjusting plate
  • 6. Mirror pressing plate
  • 7. Adjusting screw M
  • 8. Locking screw
  • 9. Adjusting screw M2

Focusing lenses

How to Adjust the Light Path of the Laser Cutting Machine? 6
  • 1. Focusing mirror inner cylinder
  • 2. Air intake pipe
  • 3. Limit screw ring
  • 4. Air nozzle transition sleeve
  • 5. Air nozzle
  • 6. Lens tube
  • 7. Limit screw
  • 8. Adjusting sleeve

After knowing the name of each component, let’s teach you how to adjust the light path of the laser cutting machine:

Four light path adjustment

(1) Adjustment of the first light path

Stick the masking paper on the dimming target hole of reflector A, manually jog the light (note that the power should not be too high at this time), fine-tune the base of reflector A and the laser tube bracket, so that the light hits the center of the target hole, and pay attention that the light cannot be blocked.

(2) Adjustment of the second light path

Move the reflector B to the remote, use a piece of cardboard to guide the light into the cross-light target from near to far, because if the remote light is in the target, the near end must be in the target, and then adjust the near end and remote light spot to be the same, that is, how the near end is deflected, and how the remote is deflected, so that the cross is in the same position in the near end and remote light spot, that is, whether the near end (far end) indicates that the light path is parallel to the Y-axis guide rail.

(3) Adjustment of the third light path

(Note: the cross splits the light spot to the left and right), move the reflector C to the remote, guide the light into the light target, shoot the target at the inlet and the remote respectively once, and adjust the position of the contrast cross to be the same as the position of the cross in the near-end light spot, which indicates that the beam is parallel to the X-axis.

At this time, if the optical path is inward or outward, it is necessary to loosen or tighten M1, M2 and M3 on the mirror frame B until they are split left and right.

(4) Adjustment of the fourth light path

Stick a piece of masking paper to the light outlet, make the light outlet hole leave a circular mark on the adhesive tape, click the light outlet, take down the adhesive tape to observe the position of the small hole, and adjust M1, M2, M3 on the mirror frame C as appropriate until the light spot is round and straight.

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