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How To Focus Ortur Laser With Lightburn

The Ortur is probably one the most popular laser engraver brands on the market. Laser Master 2 Pro is their high-end machine, and it cost about 100$ more than the Sculpfun S9, or S6 Pro or an Atomstack A5 Pro we have tested previously.

In this post, we’ll also consider ortur laser master 2 focus distance and how to focus laser engraver.

How To Focus Ortur Laser With Lightburn

  • ✅Ultra-Fine Compression: Ortur Laser Engraver has 32-bit Professional motherboard, which is smarter, faster, more accurate and easier to use. The laser engraving output power is 1W-1.6W, Engraving area is 390*410mm. Ultra-fine laser focal area is reduced to 0.12*0.15mm, The engraving machine speed can be as high as 5000 mm/min. The laser cutter can cleanly cut 6mm plywood plate in one pass.
  • ✅Safety protection: Laser Engraver newly upgraded Safety protection. 1. There is a G-sensor on the motherboard, When the engraving machine is displaced or tilted, it will automatically stop the laser; 2. If your computer system halted or USB cable disconnected, led to that the laser engraver stops moving, the laser beam will stop, to prevent fire. 3. The engraving machine is turned on, but there is no movement for a long time, the laser will be turned off automatically.
  • ✅New eye protection design: The laser engraving machine with newest panoramic filter glass protective cover plays a very good role in protecting your eyes, filtering 97% of the ultraviolet light to perfectly protect your eyes to reduce the cost of your goggles and the inconvenience of wearing goggles.
  • ✅Extensive Compatibility & Uses: Ortur laser engraver and cutter can engraving cylinders by add to rotaty rollers. Unleash your creativity on over one hundred materials including paper, bamboo, wood, leather PCB board, aluminum oxide, metal, glass, etc.compatible with various mature engraving software, such as LaserGRBL(Free), LightBurn(Paid). The ORTUR laser cutter supports Win 7 / Win 8 / XP / Win 10 / Win 11, and also support MacOS and Linux system.
  • ✅Quality and Assurance: We are the manufacturer of ORTUR. We only provide Amazon customers with the best quality and comprehensive pre-sales and after-sales services. The engraving machine enjoys a one-year warranty. If the engraving machine fails during the warranty period, please contact us.

Product Description

1.8 Firmware

  • Ortur laser master 1.8 firmware, smarter, faster, higher precision and easier to use
  • It could pre-process 32 instructions, support baud rate as high as 921600
  • Allows you to enjoy more intelligent laser engraving machine engraving
Ortur Laser 1.8 Series Firmware has been optimized for faster speed engraving. Taking advantage of the faster ESP32 McU.

1. The main frequency is as high as 240MHZ.

2. The execution efficiency is high, and the machine moves fast.

3. With current and voltage detection functions, better protection of the machine .

4. Active power-off function, which can actively disconnect the power supply in the case of abnormal power supply.

5.Support LU3 series digital Laser module, it could adjust the laser heat dissipation time after the engraving is completed according to the use of the digital laser module.

6. The use of efficient real-time operating system Freertos system is more stable and more efficient.

The latest and most advanced motherboard from Ortur R&D:

1. Higher MCU frequency and faster calculation speed.

2. Support Ortur Laser 1.8 series firmware.

3. Power Safety Control System, the laser module will be cut off after shutdown,and the power supply will be cut off if the power input is abnormal (not within the range of 21-27V).

4.Fuse over current protection function.

5. Win10, MAC drive-free connection.

6. Support more optional accessories, such as: OOC2.0 Offline Controller, OE2.0 Laser Safety Enclosure, LU3 Series Digital Laser Modules, Flame Detector, Emergency Stop Switch, etc.

Ortur Laser Master 2 Focus Distance

Ortur laser master 2 pro engraving machine is trending in 2021, because, let’s admit it, it is simple, affordable and reliable. Since you can install different laser modules on it and get different results, let’s explain the differences between long focus laser modules and short focus laser modules.

Before we start, let’s list the issues to consider when purchasing laser modules.

Things to consider before buying a laser module

Brand: If there is no special indication, laser modules and laser engraving machines of different brands are not compatible, so please pay attention to the brand name on the label before purchasing the laser module.

Focus length: You will get different results with different laser focal lengths, so you need to determine whether you need a long focus or short focus laser module before placing orders. Of course, you can also buy both to get a freer DIY experience.

What is focus length?

The focus length of laser engraving machines means the distance between the point where the laser beam is focused and the focusing lens. Different focal lengths are achieved through different lenses in different laser modules. Just like naughty children burning ants with a magnifying glass in the sun, in order to minimize the light spot and maximize the energy concentration, the distance between different magnifying glasses and the ground is different.

Please note that all the Ortur laser modules have fixed focus length, and we will include the adjust devices in the packages.

The differences between long focus and short focus laser modules.

Because the spot size of the focused laser beam is directly proportional to the focal length of the laser module, short focus laser modules generate smaller points and finer engraving, and long focus laser modules can cut thicker materials.

Short focus laser modulesLong focus laser modules
ProsSmaller focal spot, finer engravingGood at engraving harder materialsCan cut thin materials, only slower. Has a longer engraving depth, can cut faster.Good at cutting thicker materials 
ConsShallower engravingBigger focal spotMay need extra air assist to avoid black edges

To help you get the right Ortur laser module, here is a side by side comparison of Ortur Short Focus (SF) laser modules and Long Focus (LF) laser modules.

Short Focus Laser ModulesLong Focus Laser Modules
ModelOrtur LU 2-4 SFOrtur LU 2-4 LF
Picture  
Focal Spot Size0.12 x 0.15mm 0.17 x 0.25mm 
Suitable MaterialsCut & EngraveWood, plywood, corkwood, bread and other food, acrylic, leather, paperGlass, stone, oxidized metal, stainless steel, ceramic tileCut & EngraveWood, plywood, corkwood, bread and other food, acrylic, leather, paper 
Work Example  

Here is the performance comparison of three laser modules when cutting different materials with different thickness. Please note The results would be different in even same material with different finishing or different colors, So you need to adjust the speed and power rate based on different objects. Also, please adjust the focal length to be the best, make the focal spot to be the smallest. Materials couldn’t engrave or cut directly: Glossy metal plate, Transparent materials, Reflecting materials, Some materials in white color or pervious to light, etc. Then, you need to use the marker pen to black it to engrave.

 LU2-4 SFLU2-4 LFNote
     
Plywood Plate1.6mmEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
10000mm/min, M4, S1000
15Lines/mm
You can get better results if the material has a darker color
Cut
300mm/min, M3, S1000
Number of passes: 1
Cut
400mm/min, M3, S1000
Number of passes: 1
2.8mmEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
10000mm/min, M4, S1000
15Lines/mm
You can get better results if the material has a darker color
Cut
100mm/min, M3, S1000
Number of passes: 1
Cut
150mm/min, M3, S1000
Number of passes: 1
4mmEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
10000mm/min, M4, S1000
15Lines/mm
You can get better results if the material has a darker color
Cut
100mm/min, M3, S1000
Number of passes: 1
Cut
130mm/min, M3, S1000
Number of passes: 1
Pine Board6mmEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
10000mm/min, M4, S1000
15Lines/mm
You can get better results if the material has a darker color
Cut
100mm/min, M3, S1000
Number of passes: 1
Cut
150mm/min, M3, S1000
Number of passes: 1
9mmEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
10000mm/min, M4, S1000
15Lines/mm
You can get better results if the material has a darker color
Cut
100mm/min, M3, S1000
Number of passes: 3
Cut
150mm/min, M3, S1000
Number of passes: 3
Paper Board3mmEngrave
9000mm/min, M4, S400
15Lines/mm
Engrave
9000mm/min, M4, S400
15Lines/mm
You can get better results if the material has a darker color
Cut
500mm/min, M3, S1000
Number of passes: 1
Cut
500mm/min, M3, S1000
Number of passes: 1
Colored A4 Paper0.1mmEngrave
9000mm/min, M4, S350
15Lines/mm
Engrave
9000mm/min, M4, S350
15Lines/mm
If the paper is white, the result will be not good.
Cut
3000mm/min, M3, S1000
Number of passes: 1
Cut
3000mm/min, M3, S1000
Number of passes: 1
Kraft Paper250gEngrave
9000mm/min, M4, S500
15Lines/mm
Engrave
9000mm/min, M4, S500
15Lines/mm
You can get better results if the material has a darker color
Cut
1000mm/min, M3, S1000
Number of passes: 1
Cut
1000mm/min, M3, S1000
Number of passes: 1
Leather0.7mmEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
9000mm/min, M4, S500
15Lines/mm
/
Cut
800mm/min, M3, S1000
Number of passes: 1
Cut
1000mm/min, M3, S1000
Number of passes: 1
Dark Colored Non-woven Fabrics0.5mmCut
1500mm/min, M3, S1000
Number of passes: 1
Cut
1500mm/min, M3, S1000
Number of passes: 1
Can not cut the white papers
Acrylic5mmEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
10000mm/min, M4, S1000
15Lines/mm
Need to coat a dark colored paper on the transparent Acrylic plate.
Cut
100mm/min, M3, S1000
Number of passes: 3
Cut
100mm/min, M3, S1000
Number of passes: 2
Tin WireWill meltWill meltCan not engrave
Cobble StoneEngrave
100mm/min, M4, S1000
15Lines/mm
Engrave
100mm/min, M4, S1000
15Lines/mm
Need to be coated with acrylic dye heat transfer film
CeramicEngrave
100mm/min, M4, S1000
15Lines/mm
Engrave
100mm/min, M4, S1000
16Lines/mm
Need to be coated with acrylic dye heat transfer film
Powder Coated Metal / Paint Sprayed MetalEngrave
10000mm/min, M4, S1000
15Lines/mm
Engrave
10000mm/min, M4, S1000
15Lines/mm
Engrave in the powder coating layer.
Plated MetalEngrave
100mm/min, M4, S1000
15Lines/mm
Engrave
100mm/min, M4, S1000
15Lines/mm
The surface color will be changed, need to paint the glossy finishing surface black.
Anodised AluminumEngrave
100mm/min, M4, S1000
15Lines/mm
Engrave
100mm/min, M4, S1000
15Lines/mm
Stainless SteelEngrave
100mm/min, M4, S1000
15Lines/mm
Engrave
100mm/min, M4, S1000
15Lines/mm

How To Focus Laser Engraver

The laser beam is focused through the focal lens. The focal lens acts like a magnifying glass and sunlight. For a 55mm lens, the laser beam passes through the lens and converges to the smallest point at about 55mm from the edge of the lens. The laser beam is concentrated to the smallest size at this “spot”. Given that the lens is mounted in the focal tube, the question is how to put the material at the optimum location to engrave or cut.

First, think of what results are desired. Whenever we want to engrave, we want to have the laser beam focused to the smallest spot and that spot located at the top surface of the material. Having the smallest spot size will give us the best resolution.. the best DPI(dots per inch). The laser machine should have come with a manual height measurement tool. Some machine come with a square piece or acrylic to match to a marker on the side of the focal tube. Other machines come with a feeler gauge that snuggly fits between the focal tube nozzle and the top surface of the material.

The normal adjustment method is to place the material on the worktable and then to move the worktable height such that the top surface of the material is at the focus spot of the laser beam. Use the measurement tool while moving the table to the proper height. Make sure not to move the table too far. You will not want to damage the table surface, material, or the focal assembly.

Most laser machines have a movable table height. If the table will not move or is already moved to the top, then the focal tube has some adjustment to move/slide up and down about 1.5 inches. First, loosen the focal tube nut(or screw). Second, move the focal tube to the desired height above the material surface. Last, tighten the focal tube nut(or screw).

You may be concerned that you are using the provided tool to place the focus at the prescribed distance, but the focus just doesn’t seems right. Please remember that the Chinese optics are not the best. The optimum focal distance might be slightly closer or farther away from the lens. Place a piece of flat scrap material (wood) under the focal assembly. Adjust the focus such that the material is slightly too close to the focal lens. Use the “laser” button to make a test spot on the wood. The spot size will be larger than desire for engraving. Move the table away from the lens just a small distance. Move the wood to a clean target location. Make another test spot using the “laser” button. The spot size should have gotten smaller. Continue moving the table and making test spots on the wood surface. When the spot starts getting bigger, then you have just passed the focal point. This is the easiest way to find the true focal distance of your lens.

To get the best engraving….
1) Make sure that your laser is focused on the material.


2) If your target material is an uneven surface, then it may find some areas where the laser is out of focus.


3) If your target material is a dowel rod and you are not using a rotary attachment. The laser will be out of focus at some portions of the image..


4) If your image seems fuzzy at the edges of the laser cut, but is focused, then you might be trying to engrave at too high of a speed. Set the engraving speed to a slower rate. You will also need to reduce the laser power percentage as to not over-burn the material.


5) If your material shows (Scan) lines in the engraved areas, then the “scan gap” may need to be reduced. The “scan gap” is the amount of space that the rail moves in the Y direction between engraver scanning passes. Setting the “scan gap” to a lower number will give a better resolution. With some materials (anodized aluminum, hard plastics, and hard wood), a scan gap of 0.05 may give excellent results. A good setting for glass is 0.07. In soft plastics, a scan gap of 0.1 will be needed to ensure the plastic does not glob.. A setting of 0.1 is good for soft woods.

If you are regularly engraving materials that vary in distance from the focal point, then it may be a good idea to purchase a focal lens with longer focal length. The longer focal length will stay tighter to focus for more distance.

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