Recycled Prusa CoreXY Laser Cutter

thingiverse

Recycled Prusa: What Was Becomes Another. I Decided to Add a Laser Cutter/Engraver to My Shop, Turning It into a Design Challenge Based on Recycling a Prusa Mendel - Essentially a Frame of 5/16” Threaded Rod and 8mm Rod with LMU88 Bearings. The CAD Models Had to Be Simple to Print, Make What You Can, Buy What You Absolutely Must, and Source Locally. This Project Serves as a Primer for Building Gen III of My 3D Printer and a Larger Gen II Laser of Many Watts. I'm Sharing an 'As-Is', 'It Got Me to Operational' Dump of the Project STL's, Sanding and Part Prep Will Be Required. Firmware is Marlin Configured for CoreXY, Which Was Helpful in Setting a Dummy Thermistor Value, Allowing the Use of Print Bead and Hot-End Outputs as Switches from Gcode (M104 S100 and M140 S100, Send S0 to Turn Off). The Fans and Laser Power Supply Are Switched, with Fan PWM Modulating the Laser through M106. Gcode Generation is Either by Jtech Inkscape Plugin or 305 Engineering's Raster Generator. For Engraving PCB's I Ended Up Modifying 305's Code, Borrowing a Page from Jtech. The First Change Was Having Laser Off Moves Run at Full Speed, Since Acceleration Is Handled in Firmware This Shaves a Lot of Time Off the Job. The Second Change Was to Have a Pause When Turning the Laser On or Off as to Allow the Edges of the Burn to Be More Defined, 200ms Was Enough. Finally, Adding Pre and Post Gcode Safe the Machine When Done and Get It in Position. I'll See About Cleaning Up My Notes and Getting the Code Posted. Perhaps in the Future with Some Better Python Skills I Can Add Some Features.