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UMO Laser Head
With this addon, the UMO mechancis can simply used to get a laser cutter. Target: mount a cheap 3W diode laser to the print head3D printer parts and enhancements
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Commercial use is allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.
NOTE: Lasers are no toys! With such devices you can seriously damage your or others eyes!
DISCLAIMER: This design is published to show the capabilities of an UMO in cooperation with a laser. I´m not responsible for any harms occuring because somebody copied/used this design.
- drill the center of the alu extrusion to accept the 12mm aixiz module
- print all the parts required for mounting the laser bekow the print head (1x fan coupler, 2x head coupler - decide if you like the long version or the short one) and assemble the laser head
- solder the laser driver electronics according to the schematics ; take care that the resistors and the IC get their heatsink
- solder a cable to the UMO board at EXP3, Pin GND and PIN13. Those pins are located behind the Z-MAX endstop plug. Connect this cable to the relais
- connect the other side of the relais to the power line between the laser driver electonics and the laser diode
For operation, load the startup g-code and use the Z-mod bracket (lenght is 165mm) as spacer between the ply Z-trigger on the left back side of the printer table and the Z Endstop to set the correct z height. Then just clip the head below your printhead (between alu mount and ply part), connect the cables to the electronics, plug in the power supply. Next, clip on the laser beam shield.
For generating the g-code use a suitable software (e.g. cut2d). The laser is addressed via a M42 P13 Sxxx command - S0 for off, S255 for on.
Important note: I learned that in some cases the c-code will not work proper, but I have no idea why. So I have to use an M400 everytime before an M42...
More infos can be found here:
Materials and methods
- aluminium extrusion profile 40x40, L=50mm as heat sink for laser
- 9mm 455nm 3W laser diode
- Fan, 50mm, 12V
- printed parts (fan coupler, head coupler) - 2-pole cable for laser supply
- 2-pole cable for fan supply
- 10x 5.1Ohm 1W resistors
- 1x Schottky diode 60V 5A
- 1x Capacitor Ceramic 0.1uF 50V 10%
- 1x IC LM338T (EXACTLY this one !!)
- 1x Relais
- 1x LED 5mm
- 1x Fan, 12V (I used a 25x25mm one)
- 12V power supply (I use a 12V 8A notebook PSU)
- box/housing for protection
- pin headers and connectors
- PAIR OF LASER GOGGLES !!! (of course, mandatory)
- printed laser beam shield/air duct
- printed spacer for Z height (Z-mod bracket)
- G-code for setup routine (will follow) :-)
- Software for generating g-code
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