PLH3D-6W-XF Engraving Laser Head

Leading product from PLH3Dseries. Professional engraving laser head dedicated for industrial applications. Robust design, compatibility with all types of control signals used in CNC in 3D printing market as well as with a wide range of PSUs,strongest available in its size fan providing best cooling and smoke removal. Comes with lens regulator which allows to change the focus distance easily.

Reference: 001310

EAN13: 5902693110637


Available quantity: 19 Items

  • Manual

$549.00 tax excl.


  • 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 shields the mechanical surfaces and...

    In Stock
  • The PLH3D-6W Series Adapter for X-Carve is designed to make electrical connections between the laser head and the Inventables™’ X-Carve® machines, easier and quicker.

  • Inspired by the thoughts of our customers, to simplify electrical connection and speed up this process, we made The PLH3D Series Adapter for Stepcraft CNC Machines. The adapter for engraving laser head is universal, it can be used between most of the Stepcraft CNC Machines and all PLH3D Series Laser heads.

  • Our choice

    These laser glasses can help reduce the probability of light entering the user’s eye from 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.

  • Our choice

    This X-Carve® Mount allows quick installation of PLH3D-Series laser heads on Inventables™’ X-Carve CNC machines. It has mounting holes on two levels to allow different working distances. The Mount is compatible with the LaserDock Docking Station to facilitate the convenient change of tools and prevent contamination...

  • This is a power supply unit intended for PLH3D – series laser engraving heads.

  • 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 depth or color when engraving. Smoke can...

  • New

    This Mounted Aspheric lens is useful to collimate or focus laser light in the visible wavelength regime. The aspheric design nearly eliminates spherical aberration without needing multiple optical elements. It has a broadband AR coating of 400-700 nm, allowing it to be used for various applications.

  • New

    This Mounted Triplet lens can be used to variably focus or collimate the laser light with reduced aberration due to its triplet (three element) design. Its relatively long effective focal length (EFL) of 8 mm allows it to focus laser light to a small spot.

Product Description

Included Parts

- PLH3D-6W-XF laser head

- High-speed driver with Analog and PWM/TTL inputs

- Beam focus adjuster

- 2 lenses

- connector strip for lengthening the wires if needed


Features & Benefits of the PLH3D-6W-XF engraving laser head

Cutting and engraving - allows to cut and engrave on various materials such as wood, cardboard, rubber, paper, textiles, leather, plastic, balsa, plywood, and many others as well as mark on stainless steel, titanium and low heat conductance type of steel. For more check Manuals and Articles section.

Factory set lens - the laser head is shipped the High-Resolution Triplet lens installed and adjusted to focus at 60.0 mm (measured from the front-face surface of the laser head to engraving plane). This focal distance has well-optimized focal spot size which is suitable for many engraving and cutting applications. This is the best-optimized focus distance to start with! 

PLH3D-6W factory set focus

Input signals versatility - build in driver allows accepting a variety of signals 0 - 5V analog signal and 0 - 5V, 0 - 10V or 0 - 24V for PWM/TTL signal.

Driver built-in inside the laser head - Opt Lasers is the first company who integrated the laser diode driver directly into the laser head. A short connection between the laser diode and a driver ensures better protection for a diode, possibility of high-frequency current modulation as well as eliminates inductance effects during the switch-on.

Accepts a wide range of power supplies - 12 - 24V, an integrated high-efficiency DC-DC converter is 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 - a dedicated shape of the laser heads provides the best possible cooling method for a 6W laser diode. Many prototypes have been made to find the best solution for cooling the laser diode. The current design allows the laser head to warm up only by 2 - 3 degrees Celsius after a whole hour of constant work at full power.

Two type of lens included - The High-Resolution Triplet Lens with lens adjuster has a relatively long effective focal length (EFL) of 8 mm, which allows it to focus laser light to a small spot. All 6 lens surfaces are coated with anti-reflection (AR) coating centered at 450 nm. It is usually preferred for engraving a thinner line, cutting a thicker material due to the reduced convergence and divergence, or when a longer distance between the laser head and the plane of the object to be engraved is necessary.

High-Efficiency Mounted Aspheric Lens is designed to obtain as much as possible power from the laser diode. Its short effective focal length (EFL) of 4 mm make a variety of working distances possible but makes the focus spot almost twice bigger compared to Triplet Lens. This lens should be used for engraving thicker lines on wood or plastic. This type of lens is used without the lens adjuster since they need to be mounted closer to the laser diode. 

Strongest fan available on a market in its size - cooling is not the only thing that a fan is doing - 43 m3 of air per hour (25 CFM) makes a great smoke removal system, additionally, the fan has 70000 hours life expectancy.

OEM customization available for of 3D printer and CNC machine companies

Compatible with accessories for ease of use - ease of work is very important to us. As well as safety. Many accessories we produce are high quality, made on CNC machine parts which make the work easy and safe. Please check out the accessories we prepared for the PLH3D series.

Control Inputs and Electrical Connection

The laser head has two separate controls.

Modulation Input #1 accepts 0 - 5V or 0-10V (with additional 4,2k ohm resistor in series) for analog power modulation

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

10V Analog Signal input connection (X-Carve, CS-Lab and other machines)

In order to connect 0-10V analog signal to the Modulation Input #1 it is needed to add a 4,2 kohm resistor in series:

Important: The 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 motors 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 A
- Input voltage 12 - 24V
- Input current max 2A
- Integrated microcontroller for temp. measurement and soft-start
- Thermal Protection - 45 degrees
- Soft start for diode protection.
- Laser Diode ESD protection
- Laser Diode reverse voltage protection
- Overcurrent protection
- Compact Size and >90% efficiency
- CW Mode and Input Control Mode.
- PWM/TTL and Analog inputs
- Modulation Bandwich 0 - 30 kHz

Opt Lasers is a laser diode drivers manufacturer. Thanks to our experience building over a few years we created a very high-efficiency driver with low power consumption and low heat production. Additionally, it is the fastest dedicated laser head driver available on a market accepting signals up to 30kHz. Using 6W laser with high speed is no longer a problem while engraving small details or making small radius turns because the driver is able to read all needed signals.

CNC controllers are able to send modulation signals with a great speed so 50kHz is not a problem to them. This is why a high-speed driver is a must in such a device. The driver is able to read 30 000 instructions every second what creates great precision and resolution in terms of power control. Also, maximum driver current is 6 A so using it with 3 - 4 A value ensures offset and long lifetime of a driver.


The PLH3D 6W 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 housing temperature exceeds 47C. The analog input is protected by a 5V Zener diode in a case on occasion there appears the voltage higher than 5V. Despite everything, this input should not be used with higher voltages due to a risk of damage. The laser diode is protected via a Schottky diode, which protects it from a reverse voltage and ESD. In addition, the integrated driver is fully covered to protect it from metal chips in a CNC machine environment.

More info


The focus distance can be quickly set or changed via the included lens adjuster (no additional tools). The driver of the unit is integrated directly on the laser head.  This greatly increases the maximum modulation frequency and allows longer cables to be used.

Besides the standard functionality, the small beam spot allows the possibility of using this product for rapid PCB prototyping.  This is done by illuminating the copper layer of plates after a photosensitive paste is applied.

Improved Heat Sinking

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

Accessory for Smoke (see accessories)

The 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 to all customers' needs. We can add customers' logos and all possible additional features. Customization is offered for a 3D printer and CNC manufacturers and distributors. 


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

   Azteeg X3 

   CNC Shark 

   GeckoDrive 540


   MakerBot Replicator1 and Clones

   MakerBot Thing-O-Matic

   MakerGear M2



   Openbuilds – C Beam/OX

   PrintRBot Upgrade

   Replicator 2 and 2X 

   RepRap – Melzi Board

   RepRap – RAMPS1.4 

   RepRap – RUMBA


   Shapeoko 2

   Shapeoko 3



   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 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 - 480nm in order to avoid reflected radiation.
Never point laser head at people or animals.
Do not touch the beam, it may cause burns or other 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.

Technical Data

Dimensions40 x 55 x 78 mm
Focal Length20 - 120 mm
Focused Beam Spot Size @ 30 mm0,1 x 0,1 mm
Focused Beam Spot Size @ 60 mm0,1 x 0,2 mm
Input Voltage12 - 24 V
Max. Power Consumption30 W
Noise58 dBA
Weight210 g (7.4 oz.)
Mounting Hole TypeM3 x 0.5 x 4.5 mm
Ambient Temperature Range (Operating)0 - 45°C (32 - 113°F)
Mounting Hole Pattern4 Holes 24 x 15 mm (0.94 x 0.59 in.)
Modulation Input 10 - 5V Analog/TTL/PWM
Modulation Input 20 - 24V TTL/PWM
Max. Modulation Bandwidth30 kHz
Laser Diode Wavelength450 nm
Laser Diode Optical Power6 W