Laser Rotary Lower Profile

thingiverse

Laser Rotary This is a low-profile version designed for the K40 Laser. The device is only 55mm high and driven by a single screw. The base must be mounted on ply or MDF that is at least 5mm thick to give clearance for the stepper motor. This rotary isn't suitable for the stock K40 controller, such as the M2nano. You will need to upgrade to a controller that can be configured for a rotary device. I use a Cohesion3D running Smoothieware and Lightburn Laser software. You will need to modify the steps per degree configuration value for correct rotary length movement. Other laser controllers like Ruida will also work. Video https://youtu.be/QKdoydIUb0Q https://youtu.be/X-G1LoCONFc Parts Required 5/16x18 threaded rod (or 8mm) Four 608-2rs skate bearings Small M3 nuts and bolts to attach pulleys and stepper motor Eight 5/16x18 lock nuts (or 8mm) Nema17 stepper motor Four 30mm inside diameter rubber O-rings Stepper motor coupler I used the OpenSCAD parametric pulley to design the idler pulleys. https://www.thingiverse.com/thing:16627 If you want to laser tapered objects, print a pair of larger diameter idler pulleys. Adjust along the length of the threaded rod so the object is parallel to the laser head. The 5/16 threaded rod is slightly smaller in diameter than the 8mm ID bearing. Wrap a couple of layers of tape around the threaded rod so the bearing fits tightly. Better yet, use 8mm threaded rod and lock nuts. You will need to modify the pulley/idler shaft diameter for 8mm. Get straight threaded rod to minimize wobble. The SolidWorks design files for the base are available if you want to re-mix. Fusion360 can import them for modification. The bearing pockets are 50mm apart. For a stepper motor coupler, you can print one such as this https://www.thingiverse.com/thing:1329750 or https://www.thingiverse.com/thing:7678 If you want to connect both threaded rods together, you can print some GT2 2mm pitch pulleys and connect them with a belt. Use 25-tooth GT2 2mm pitch pulleys and a 75-tooth GT2 2mm pitch belt. This will give center-to-center length of exactly 50mm, the distance between the two bearings.