MK8 3D Printer Conversion, Laser/Spindle Engraver

thingiverse

Conversion parts and interchangeable mounting bracket for installing a MK8 all-in-one, direct drive extruder/hotend on a laser/spindle CNC engraver. Switch between 3D printing, spindle motor engraving, and laser engraving. Fits engravers that accept a 33mm square laser body and is height-adjustable within the engraver's clamp for bed leveling. The NEMA 17 motor clamp of this adapter requires four M3x20mmL screws and nuts. The filament cooling version of the clamp also requires a 40mm blower and four M2x5mmL screws. Photos show the 3D printing adapter installed on a "24x17cm" engraver with 65mm Z travel. The four 230mm 2020 uprights were changed to 300mm length to accomodate the hotbed assembly on top of the engraving platform. The heat sink was drilled and rotated 90 degrees so that the fan does not exhaust directly on the heater block. UPDATED 01/14/2019: Added filament rack holders for a round spindle rod, and added a motor/extruder holster/hanger for storage of the unused part while the other is in operation. Fits a 540 spindle motor. A front-mounted filament rack can be constructed from the original 2020 uprights. You will need corner brackets and a round rod or dowel, (anodized aluminum 15mmOD x 300mmL, commonly used in photography). UPDATED 01/10/2019: On the blower version, closed off the bottom left of the heatsink to keep the fan exhaust away from the heater block and nozzle. Flip the fan so that it blows away from the heatsink. Added BIQU/Lerdge optical endstop sensor mounts and interrupters that fit the 2417 engraver. Requires M3 screws and T-nuts. Added heat bed hold-down tabs that require M4 screws and T-nuts.