Brackets for K40 laser bed

thingiverse

By request, here are the three pieces I designed for making a stepper-motor adjustable laser bed for the K40 laser. These pieces are specifically designed for use with: - A 12x12mm wood rod, which you can saw to size. I found this at my local hardware store. - 3 or 4 pieces of 8mm diameter lead screw (length about 100mm), along with their accompanying nuts. I discovered these on Aliexpress by searching for "T8 leadscrew 100mm". There's a decent tolerance between the 12mm rod and the holes it fits into, so you'll need some glue to put the thing together. Use two corners for screws, two corners without screws, and one sidepiece if you're aiming for three lead screws. Three points define a plane, so I recommend this setup for the most consistent result. However, many people think a rectangular bed should be supported on all four corners, even though adjusting one corner incorrectly will lead to a warped, non-flat surface. If you prefer this method, just print four times the corners with screw holes and forget about the other models. I connected the nuts to the printed parts using small tiewraps, although you could use small bolts as well. I have automated this entire setup using three stepper motors connected to the bottom of the K40, along with an Arduino to control them. However, you can just use this as a manual bed by turning the lead screws by hand.