K40 Laser Motorized Z-Bed

thingiverse

See this video to build the bed: https://www.youtube.com/watch?v=CWHxK8Uck-s You'll need to print the following parts with support: 4 x bottom-frame-joint.stl 4 x top-frame-joint.stl 1 x tensor-bracket.stl All other parts can be printed without support. Other parts needed are: 1 x stepper motor and toothed pulley as shown in photos 2 x square aluminum tubing 285x20x20, 1.5mm wall thickness 2 x square aluminum tubing 205x20x20, 1.5mm wall thickness 2 x square aluminum tubing 285x16x16, 1.5mm wall thickness 2 x square aluminum tubing 205x16x16, 1.5mm wall thickness 1 x circular belt GT2, 6mm wide, at least 1360mm long 3 x smooth pulley GT2, 16mm diameter, 5mm hole 4 x toothed pulley GT2, 16mm diameter, 8mm hole 4 x threaded rod M8 105mm 8 x M8 nut 4 x M8 washer 8 x skate bearing (ABEC number unimportant) 3 x M5x30 screw 3 x M5 butterfly nut Some assorted screws are also needed: 4 x M3x10 screw (for stepper motor) 2 x M3x25 or M3x30 (for motor mount against tube) 2 x M5x25 or M5x30 (for smooth pulleys on the motor mount) 1 x M5x20 (for tensor bracket) The stepper motor, belt and pulleys are easily found as they are used in many popular 3D printers. One disadvantage of this design is that with the stepper motor and other pieces inside the cutting area, a solid bed plate is necessary to avoid damaging the laser or its motor. It also limits the full range of the bed but this is not a problem for me as I don't plan on using thick materials. More exact instructions will be added at a later date.