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Prusa Laser Upgrade Kit with PLH3D-2W

Prusa Laser Upgrade Kit with PLH3D-2W

This kit includes all of the necessary attachments to laser engrave with your Prusa i3 MK3S 3D printer. It includes a PLH3D-2W Laser Head, with which you can equip your Prusa 3D printer with a low-cost laser engraving and cutting module. This engraving laser upgrade kit for Prusa will change the way you think about working with your 3D printer!

In stock





SKU: 002081

GTIN: 5902693111122


Individual Kit Parts

Technical Data

Focus Distance
20 - 120 mm
Focused Beam Spot Size @ 50 mm
0,1 x 0,1 mm
Focused Beam Spot Size @ 80 mm
0,1 x 0,18 mm
Modulation Input Voltage Range
0 - 5 V
Modulation Type
Analog / TTL
23 dBA
Laser Diode Wavelength
450 nm
Max. Laser Diode Optical Power
2 W

Product Description

The parts included in the Prusa Laser Upgrade with PLH3D-2W Laser Head are listed above, in the section “Individual Kit Parts”


Turn your Prusa 3D printer into a laser engraving and cutting platform!

Note: PLH3D-2W-Prusa laser head, which is included in this kit, is a modified version for the Prusa 3D printer only.

Our Prusa Laser Upgrade Kit is a low-cost solution for both amateur enthusiasts and professional applications alike. It allows users to customize their 3D printer and expand its functionality.  The blue PLH3D-2W Laser Head is light and suitable for engraving, marking or cutting a variety of materials, such as textiles, wood, cardboard or leather. The kit includes a customizable STL model of the laser mount, which can easily be printed on the Prusa 3D printer. The set-up process is both simple and straightforward. A manual for mounting the laser head and getting started, as well as software, is downloadable from our website.

PLH3D-2W Engraving Laser Head

PLH3D-2W is a medium power 2W professional engraving laser head. This lightweight 70-gram laser does not require any external cooling. The heat sinking design not only cools the laser head, but also protects the lens from dirt by creating an air nozzle. 

The laser driver is equipped with an LED indicator that displays all the information essential for operating the laser. An integrated temperature control system is designed to turn off the laser head when the maximum operating temperature is exceeded. By attaching the miniature driver directly on the laser head, the speed of diode modulation is improved in comparison to systems with a separate driver. This design allows connecting longer cables to the head, if needed.

Thermal tests we conducted on several prototypes allowed us to optimize the radiator’s shape and enable efficient cooling, maintaining a compact size of the device. Overall the laser’s functionalities are standard for PLH3D Series, but the smaller spot size opens a possibility to illuminate surfaces covered with a photosensitive material. This gives a chance, for example, for a very quick PCB prototyping.


Printable Height Reference Tool

Moreover, the kit includes an STL file of a height reference tool that can be used for calibration of working distance and the focus on the Z-axis

How to use the Height Reference Tool:

  • Mount the laser head on your printer.
  • Place the adjusting tool on the working plane of the printer, under the laser head.
  • Using your controller/software move the laser head in Z-Axis, try to gently touch the reference tool. At this point you can calibrate Z-Axis.



The included file for a 3D-printed mechanical mount is included for your convenience. It is intended to be printed on by the customer. The design can also be modified by the customer to suit their specific needs. Note, it is the responsibility of the customer to ensure that the mounting adapter is well-suited to allow the laser to be mounted and operated safely. Tomorrow’s System and its affiliates take no responsibility for the reliability or performance of the laser mounting adapter printed by the customer.


  • Remember that it is not a toy.
  • Laser radiation is dangerous even when scattered or reflected from any surface.
  • Always use proper protection laser filter on your CNC machine dedicated to 430 - 480 nm in order to avoid reflected radiation.
  • Never point laser head at people or animals.
  • Do not touch the beam, it may cause burns or another injury.
  • Do not stare at the beam or the beam spot while the material is being cut.
  • Laser radiation - Avoid eye or skin exposure to direct or scattered radiation. 
  • Class 4 laser product.


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