UMO Laser Head

youmagine

Note: Lasers are not toys! With such devices, you can cause serious eye damage to yourself or others. DISCLAIMER: This design is published to demonstrate the capabilities of a UMO in conjunction with a laser. I am not responsible for any harm that may occur due to someone copying or using this design. - Drill the center of the aluminum extrusion to accommodate the 12mm Aixiz module. - Print all the parts necessary for mounting the laser below the print head (1x fan coupler, 2x head coupler - decide whether you prefer the long version or the short one) and assemble the laser head. - Solder the laser driver electronics according to the schematics; make sure that the resistors and IC have their heat sinks. - Solder a cable to the UMO board at EXP3, Pin GND and PIN13. These pins are located behind the Z-MAX endstop plug. Connect this cable to the relay. - Connect the other side of the relay to the power line between the laser driver electronics and the laser diode. For operation, load the startup g-code and use the Z-mod bracket (length is 165mm) as a 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 aluminum mount and ply part), connect the cables to the electronics, plug in the power supply. Next, clip on the laser beam shield. To generate the g-code, use a suitable software (e.g. cut2d). The laser is addressed via an M42 P13 Sxxx command - S0 for off, S255 for on. Important note: I discovered that in some cases the c-code may not work properly, but I have no idea why. So I must use an M400 every time before an M42. More information can be found here: https://ultimaker.com/en/community/view/9028-hacking-um-to-cut-stuff