Reduced price!

PLH3D-6W-uSpot Engraving Laser Head with a free G2 Lens

The youngest and most precise member of our PLH3D family of laser heads. A higher optical performance and energy density with a smaller spot size (compared to other 6 W lasers) gives this laser head faster engraving speeds and allows for the cutting of thin materials like textiles and films.  It comes with a new type of customized, easy-to-clean lens.

5 out of 5

$749.00 tax excl.




Payment logo

Availability: In stock


SKU: 002415

GTIN: 5902693111764

Individual Kit Parts


  • $169.00 In stock
    Our Choice

    This docking station is designed to allow PLH3D-6W–Series laser heads to quickly connect or disconnect from machines. Aids easy removal of the laser head when it is not in use. Protects the laser unit from oils, metal particles, and dust. Includes an Aluminium cover that ...

    PCS Add to cart
    In stock
  • $149.00 In stock

    The PLH3D-CNC Universal Laser Adapter designed for all types of CNC/3DP machines. Easy and quick connection between laser head and CNC controller. It accepts all CNC control signals.  Everything you need is included!

    SET Add to cart
    In stock
  • $149.00 In stock

    The PLH3D-CNC Adapter for X-Carve is designed to make electrical connections between the laser head and the Inventables™’ X-Carve® machines, easier and quicker. It also increases the safety level of laser operations.

    SET Add to cart
    In stock
  • $149.00 In stock

    This is adapter kit for PLH3D-6W Series Laser Head to Stepcraft CNC machine. Simple and easy connection between PLH3D-6W Series laser head and Stepcraft CNC machine. All necessary parts are included !

    SET Add to cart
    In stock
  • $149.00 In Stock

    High-Pressure Air Assist Nozzle is an invaluable resource for cutting and engraving with a laser. Being able to increase the speed of laser cutting and engraving by up to 6.5 times compared to the base speed as well as substantially improve the quality of the processed ...

    PCS Add to cart
    In Stock
  • $69.00 In stock

    The PLH3D-CNC Hobby Adapter designed for most of the CNC/3DP machines. Easy and quick connection to almost any type of the CNC controller output connector and any type of signal modulation. Everything you need is included!

    SET Add to cart
    In stock
  • $65.00 In stock
    Our Choice

    These laser glasses can help reduce the probability of light entering the user’s eye from a diffusely backscattered laser light. This product is OD 7+ over the range of 190 to 540 nm, blocking deep ultraviolet to green including violet and blue light.

    PCS Add to cart
    In stock
  • $35.00 In stock
    Our Choice

    This air nozzle quickly interfaces with PLH3D-6W–Series engraving laser heads via magnets and also functions as a 43 mm spindle adapter. It directs the flow to prevent dark smoke from impeding the laser light from reaching the sample. This helps to ensure a consistent cutting ...

    PCS Add to cart
    In stock

Technical Data

L:40 x W:54 x H:105 mm
Focus Distance
60.0 mm
Input Voltage
12 - 24 V
Max. Power Consumption
30 W
58 dBA
220g (7.76 oz.)
Mounting Hole Type
M3 x 0.5 x 4.5 mm
Operating Ambient Temperature
0 - 45°C (32 - 113°F)
Mounting Hole Pattern
4 Holes 24 x 15 mm (0.94 x 0.59 in.)
Modulation Input 1
0 - 5V Analog/TTL/PWM
Modulation Input 2
0 - 24V TTL/PWM
Max. Modulation Bandwidth
30 kHz
Laser Diode Optical Power
6 W
Max. Power Density
680 [kW/cm^2]

Product Description

Parts included in the PLH3D-6W-μSpot laser head:

  • PLH3D-6W-XF Engraving Laser Head
  • uSpot Lens Upgrade
  • High-Efficiency Lens
  • High-speed driver with analog and PWM/TTL inputs
  • High-resolution and high-efficiency engraving lens
  • Connector strip for lengthening the wires if needed

New Version of PLH3D-6W-Series Laser Head. What is new?  

     Improved  mechanical design

New generation of PLH3D-6W-Series has an even more compact design which looks even better than the previous one. The laser head is no longer a pigtailed, a cable can be simply and quickly connected or disconnected via 6-pin terminal.

The laser head is still compatible with all PLH3D-Series accessories and adapters.

     Improved safety features

The laser head is now equipped with an “Armed” indication LED. Whenever the laser head is connected to the power supply the indication LED will turn on.  Additionally to the laser safety features the LED will indicate if the laser head is overheated.

- If the ambient temperature of the environment where the laser head operates in CW mode exceeds 40⁰C (104⁰F) the indication LED will start blinking. Such a warning means that the temperature is about to cross maximum operating temperature.

- In case of the ambient temperature of 45⁰C (113⁰F) and above the indication LED will no longer work and the laser head will shut down.

     Improved electronics

New version of PLH3D-6W-Series is equipped with the new generation laser diode drivers. Compared to the previous version this laser diode driver has higher efficiency, less noise and higher quality components which ensures reliability and long lifetime of the laser.

     Additional switch for 10V analog input

The laser head is now equipped with an additional switch for 10V analog input. Modulation Input 1 of the laser head can be changed from 0 – 5V analog input to 0 – 10V analog input. This change makes the laser head even more versatile and compatible with more CNC machines and 3D printers. Please refer to the user manual to find out how to change voltage range on Modulation Input 1. 


Features & Benefits of the PLH3D-6W-μSpot Engraving Laser Head

Faster engraving and cutting of thin materials - the PLH3D-6W-μSpot is designed to achieve the best available optical performance, highest optical power output, smallest spot size and highest density of energy at the focal spot for the fastest engraving and cutting possible with a 6 W diode. This laser head can cut and engrave various materials such as wood, cardboard, rubber, paper, textiles, leather, plastic, balsa, plywood, and many others, as well as marking stainless steel, titanium, and low heat-conducting types of steel. In the same amount of time, you can do 40 to 80% more cutting or engraving. For more information, check out a comparison with our PLH3D-6W-XF laser engraver.

New, customized, easy-to-clean optics - this engraving laser head is shipped with newly-customized optics that provide the highest optical power output, smallest spot size, and highest density of energy at the spot among all the PLH3D series laser heads. It is also easier to clean because all lens surfaces are easily accessible.

Factory set focus - the lens is installed and adjusted to focus at 60.0 mm (measured from the front-facing surface of the laser head to engraving plane). This focal distance is optimized to deliver a focal spot size which is suitable for many engraving and cutting applications.

Symmetric Beam Offset - In some applications, such as laser engraving wood, it is recommended to defocus the laser by a small amount in order to achieve a symmetrical beam. This can be done by translating the laser forward or backward in the beam propagation direction by the amount shown in the table below. Doing so will allow the laser to engrave with the same line thickness in both the X and Y directions. However, for certain applications, such as engraving metals and cutting, maximizing the power density is more desirable than having a symmetrical beam. In these cases, defocus is not always necessary or recommended for the best performance.

Recommended defocus for specific engraving applications:

Laser Head Model           Symmetric Beam Offset Value
PLH3D-6W-XF                    ±4.4 mm (± 0.173")
PLH3D-6W-Hobby             ±4.4 mm (± 0.173")
PLH3D-6W-μSpot              ±1.8 mm (± 0.070")

For example, The PLH3D-6W-XF engraving laser has a factory-preset focus at 60.0 mm from the front of the laser head. Setting the laser to 64.4 mm or 55.6 mm (+/- 4.4 mm from the focus) will allow the laser head to engrave with the same line thickness in both directions

Input signal versatility - the built-in driver accepts a variety of signals including 0-5 V analog signals and 0-5 V, 0-10 V or 0-24 V for PWM/TTL signals.

Built-in driver inside the laser head - Opt Lasers is the first company to integrate the laser diode driver directly into the laser head. A short connection between the laser diode and a driver ensures better protection for the diode, the possibility of high-frequency current modulation, and eliminates inductance effects when turning on.

Accepts a wide range of power supplies - accepts 12-24 V thanks to the integrated high-efficiency DC-DC converter adjusting the input voltage to proper diode compliance voltage. This reduces the amount of heat generated and ensures over-voltage protection.

No additional cooling required - the thoughtfully-designed shape of the laser head provides the best possible cooling for a 6 W laser diode. This laser head design was found to optimize cooling of the laser diode after testing many prototypes. The current design allows the laser head to warm up by only 2 to 3 °C after an hour of constant work at full power.

Strongest fan available on the market for its size - cooling is not the only function of this fan; 43 m3 of air per hour (25 CFM) doubles as a great smoke removal system. Additionally, the fan has a life expectancy of 70,000 hours.

Compatibility with accessories for ease of use - usability and safety are very important to us. We use in-house CNC machines to produce high quality components that are convenient and easy-to-use. Check out our cutting and engraving laser accessories for PLH3D series laser heads.

OEM customization is available for CNC and 3DP machine manufacturers.

Control Inputs and Electrical Connection

The PLH3D-6W-μSpot blue laser head has two separate controls.

Modulation Input #1 accepts 0-5 V or 0-10 V (with additional 4.2k ohm resistor in series) for analog power modulation.

Modulation Input #2 accepts 0-5 V, 0-10 V or 0-24 V for TTL/PWM and turns on the laser when the voltage exceeds 2.5 V.

Important: Do not connect both Modulation Input 1 and Modulation Input 2 at the same time. Doing so may result in the malfunction of the laser head.

10 V analog signal input connection (X-Carve, CS-Lab, and other machines).

In order to connect the 0-10 V analog signal to the Modulation Input #1 it is necessary to add a 4.2k ohm resistor in series, as shown below.

PLH3D-6W-μSpot laser head - 10 V connection diagram

Important: PLH3D-6W-μSpot engraving laser head should be powered from a high-quality power supply without anything else connected. Please note: connecting the laser head to the same power supply unit as a stepper motor or any other high-impedance equipment is not recommended. Doing so may cause damage to the laser diode.

Laser Driver Parameters

High power and high-frequency current laser diode driver

  • Maximum output current capacity: 5 A
  • Typical output current: 3-3.5 A
  • Input voltage 12-24 V
  • Input current max 2 A
  • Integrated microcontroller for temp. measurement and soft start
  • Thermal protection system: 45 °C 1
  • Soft start for diode protection
  • Electrostatic discharge (ESD) protection
  • Reverse voltage protection
  • Overcurrent protection
  • Compact size and 90% efficiency
  • CW Mode and Input Control Mode
  • PWM/TTL and analog inputs
  • Modulation bandwidth 0-30 kHz


1. Thermal protection system that cut off the laser when ambient temperature higher than 45°C.


Opt Lasers manufacturers the laser diode drivers in-house. From our years of experience designing and creating laser diode drivers, we have developed a high-efficiency driver with low power consumption and low heat production. On top of that, it is the fastest dedicated laser head driver available on a market accepting signals up to 30 kHz. Using the 6W laser at high speeds is no longer a problem while engraving small details or making small radius turns because the laser controller is able to read all the needed signals.

CNC controllers are able to send modulation signals at high speeds so 30 kHz is not a problem for them. This is why a high-speed driver is a requirement in laser head drivers. Our driver is able to read 30,000 instructions a second which provides great precision and resolution in terms of power control. Also, the maximum driver current is 6 A so using it with 3-4 A value ensures offset and a long life for the driver.


The PLH3D-6W-μSpot laser head incorporates a thermal protection system that protects the laser diode from overheating to maintain its lifetime. The unit is designed to automatically shut off when the ambient temperature exceeds 45°C and the laser head operates at CW mode. The analog input is protected by a 5 V Zener diode in case a voltage higher than 5 V is received. Despite this, this input should not be used with higher voltages to prevent damage. The laser diode is protected via a Schottky diode, which protects it from reverse voltage and electrostatic discharge (ESD). In addition, the integrated driver is fully covered to protect it from metal chips and debris in a CNC machine environment.

More info about PLH3D-6W-μSpot laser head:

Improved Heat Sinking

This lightweight, 220 g (7.8 oz) laser head requires no additional cooling. The body acts as a heatsink, and the fan design allows it to function as an air nozzle protecting the lens from smoke, while also cooling the laser head. Iterative prototype design testing allowed us to optimize the heatsink’s shape and enable efficient cooling while maintaining the module’s notably small form factor.

Accessory for Smoke (see accessories)

Our 6W laser head allows engraving or cutting of materials such as wood, stainless steel, paper, leather, cardboard, and many others. For materials that generate smoke when engraved or cut, we offer an optional nozzle that is attachable to the front of the unit via magnets built into the laser head (see accessories).


For bulk orders, the PLH3D series can be customized based on the customer’s needs. We can add a customer’s logo and additional features by request. Customization is offered for 3D printer and CNC manufacturers and distributors.


Our PLH3D series works with many CNC and 3D printing machines including the following models:

  • Azteeg X3
  • CNC Shark
  • GeckoDrive 540
  • Lulzbot
  • MakerBot Replicator1 and Clones
  • MakerBot Thing-O-Matic
  • MakerGear M2
  • MakiBOX
  • Openbuilds – C Beam/OX
  • PrintRBot Upgrade
  • Replicator 2 and 2X
  • RepRap – Melzi Board
  • RepRap – RAMPS1.4
  • RepRap – RUMBA
  • Rigidbot
  • Shapeoko 2
  • Shapeoko 3
  • Solidoodle
  • Stepcraft
  • Ultimaker 1 & 2
  • Velleman K8200
  • X Controller
  • X-Carve Upgrade
  • Zen Toolworks

Note that this list is being continuously updated. Please contact us if you have any questions or feedback regarding compatibility.


Remember that this laser is not a toy.

Laser radiation is dangerous even when scattered or reflected off a surface.

Always use proper laser filter protection on your CNC machine dedicated to 430-480 nm in order to avoid reflected radiation.

Never point lasers at people or animals.

Do not touch the beam, it may cause burns or other injuries.

Do not stare at the beam or the beam spot while the material is being cut; devastating and permanent eye damage can occur as a result of direct, diffuse or indirect beam viewing.

Laser radiation - avoid eye or skin exposure to direct or scattered radiation.

Class 4 laser product. 



Perfect Tool

What I like is the good and detailed description and the construction 3D data. This allowed me to quickly and reliably create the appropriate adapter and connections for my portal milling machine. With the application notes I got very fast very good engraving results also on e.g. glass. For the raster engraving I now use the following Inkscape plugin (


Excellent for Hobbyists/XCarve Compatible

I purchased this product when it was the most powerful entry-level laser Opt had. I explained to the company that I would use it for the XCarve, and they were quick to respond with specifications and compatibility. The USpot lens is perfect for all my wood marking/engraving needs. I use both Lightburn and VCarve Pro to program my designs and XCarve to control the laser easily. I highly recommend Opt Lasers for their fantastic product and customer service. The best part is I've owned this laser configuration for two years now and have had zero issues!


Excellent small cut

I purchased this item and the spot size was really small. Very practical for good finishing.

Write a review