Deutsche Version
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LaserMaster 2 2S from Ortur

The gadget in moving pictures with sound


Ortur has so far refused to release the source code of the Laser Master 2 series firmware. These devices are proven to use code based on grbl, and the GPL V3 license of this software specifically requires that any changes made to the code must also be released under an open license. Ortur therefore violates applicable law, which is why I don't recommend buying their laser machines!
Requests regarding the source code for the firmware of the Ortur devices can and should be sent to support@ortur.tech.
More about Open Source on HOITG.

Update: meanwhile Hackaday has picked up the story on their blog pages:
Watch Out For Lasercutter Manufacturers Violating GPL
Fighting The Good Fight
and thus triggered a change. I'm in talks with a guy from Ortur Support who is convinced that the disclosure of the source is not only necessary, but also an advantage for the company and has now managed to also convince the software department to release the grbl related code. I have now received a roadmap that makes clear that this should happen in the next few weeks.
The ball started rolling faster than I thought!


How Open Is This Gadget?

Category Remark Info
Firmware Firmware is based on the open source software grbl.
Ortur doesn't publish the modified source code of their firmware!
?
Software Machine data can be processed with common open source software to generate Gcode.
?
Hardware The components are very easy to replace, common screw types, nothing is glued.
?
Elektronik Mainboard uses a common ESP32 microcontroller.
?
Website The website lists very precise information about the materials that can be processed.
Ortur does not publish the modified source code of their grbl based firmware and so soesn't follow the rules of the GPL V3 license! Ortur thus violates applicable law!
?

About the gadget

Figure 1:
The LaserMaster 2 2S from Ortur can process workpieces with a base area of up to 39.5x41cm. The two axes are guided along extruded aluminum of the dimensions 20x20mm with the help of plastic rollers on metal ball-bearings. The backlash can be minimized via eccentric nuts using the included wrench. The axes are driven via timing belts. The two pulleys of the Y-axis are connected via a round rod and so driven by only one stepper motor. The advantage of this construction is that the two ends of the X-axis cannot be moved independently, so the mechanics wont get misaligned over time.
The firmware of the LaserMaster 2 2S is based on "grbl", but Ortur refuses to publish the changed source code of their firmware and thus clearly violates the license of this software!


Technical Specs

Category Value Remark
Work area 395x410mm  
Dimensions 57x60x20cm  
Laser module Laser power: 5.5W
Input power: 16W
Focal length: 30mm
Wavelength: 450nm
Type LU2-4-SF
End schwitches X, Y at zero point  
Energy consumption With laser at 100%: 30W
Air pump: 16W
Power supply: 24V at up to 2A
Air pump is an option.
Power supply air pump: 12V at up to 2A.

Package contents

Figure 2:
Included in the package are a power supply that delivers an output voltage 24V at up to 2A, a USB cable for data transfer from a PC, tools for the assembly, and some materials that can be engraved with the machine.
Also included are safety goggles, an you should make sure to wear these while operating the device!

Assembly

Figure 3:
There isn't too much to be done:
Assembling the frame and the wiring is done quickly.

Electronics

Figure 4:
A microprocessor type ESP32 is placed on the mainboard running the firmware GRBL. A socket for the power supply, the USB socket for data transmission and a socket for an offline controller are the interfaces to the world outside. A power button and a second button for resetting the firmware can be seen on the right of the mainboard. The front and back of the circuit board are labeled perfectly.
The power supply delivers an output voltage of 24V at up to 2A, which is 48W.

Laser module

Figure 5:
The laser module is type LU2-4-SF - "SF" stands for "Short Focus", meaning a focal length of 30mm. The maximum laser power delivered by the built-in diode is 5.5W while consuming an electrical input power of around 16W.

Extras

Figure 6:
In addition to various laser machines, Ortur also offers plenty of accessories for these devices - extras I received are a metal grid for laser cutting and an electric pump that can be used to blow a jet of air onto the surface for better results. The power supply of the air pump delivers 12V at up to 2A, which is 24W.

Tests

Figure 7:
Cutting cardboard and plywood:
A-D: 2mm single cardboard, front and back
E+F: 4mm plywood, front and back
G+H: 4mm plywood, front and back, with "Air Assist" and metal grid
I: Back without and with "Air Assist" and metal grid
J-L: 2mm cardboard, stack of 4
Details on the testprocedure.

Figure 8:
Engraving bitmap and vector graphics:
Details on the test procedure.

Figure 9:
Engraving the included sample materials:
The laser cannot engrave bare aluminum because this material has a too good thermal conductivity. Only the colored coating is evaporated from the bone shaped aluminum. With that, the engraving is clearly visible.

My conclusion

As long as Ortur refuses to publish the modified source code of their grbl-based firmware, I strongly advise against buying the device!
Requests regarding the source code for the firmware of the Ortur devices can and should be sent to support@ortur.tech.


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