How to Replace a LU1-3/LU1-4 Fixed Focus Laser Module

1. Ortur Laser Master Laser Engraver:

Please unplug the laser cable from the module and unscrew the old module from the Backboard of the laser module. Then, put back the fixed focus laser module, and use 2 x M3*8 screws and M3 spacers to fix the module onto the backboard, and replug the laser cable.

[Illustration showing the laser module on the Ortur Laser Master Engraver with labels pointing to 'Please unplug the laser cable.' and 'Please unscrew the old module from the Backboard of laser module.']

2. Ortur Laser Master Laser 2 Engraver:

Please remove 4 x M5 cap nuts, unscrew and take out the backboard from the old laser module. Use 2 x M3*8 screws to reassemble the Fixed Focus Laser module, and then, put it back with 4 x M5 cap nuts.

[Illustration showing the laser module on the Ortur Laser Master Laser 2 Engraver. One part of the illustration shows the removal of '4 x M5 cap nuts.' Another part shows the reassembly with '2 x M3*8 screws to reassemble the Fixed Focus laser module.']

Please move the Y limit switch more front, to give a wider gap, so that the fixed focus laser module wouldn't hit the aluminum profile. The required distance is indicated as 28mm.

[Illustration showing the Y limit switch adjustment on the Ortur Laser Master Laser 2 Engraver, with a measurement of '28mm' indicating the desired gap.]

3. How to use the Fixed Focus laser module:

Please loosen the screw, and this sliding block could move 0-30mm up or down. When the desired height is reached, you can tighten this screw to secure the sliding block.

[Illustration showing the adjustment of the sliding block on the laser module, indicating a movement range of 0-30mm.]

This lens is not screw in/out, but a friction fit. It could be extended 0-10mm.

The focal length of this fixed focus laser module is a fixed value. You could put an aluminum gauge between the object to be engraved and the lens, extend the lens to fine adjust the distance, let the lens touch the aluminum gauge. Then, take out this aluminum gauge, and get a perfect focal length.

[Illustration showing the process of setting the focal length using an aluminum gauge between the object to be engraved and the laser module lens. The lens can be extended 0-10mm.]