remix of Niko’s Egg-painter robot (OpenBuilds)

thingiverse

This is a remix of Niko’s Egg-painter robot that works with either 2040 or 2080 OpenBuilds V-Slot linear rail. Longer legs allow for the original control board mounting brackets to be repositioned in front, enabling easier access to the pause and reset buttons on the control board. I used two 175MM lengths of Openbuild's 2040 V-Slot Linear Rail left over from a prior project, along with a genuine eggbot Precision Egg Coupler, Precision Tail Coupler, and EBB Driver Board. A Micro Servo 9g FS90 servo motor was also utilized, along with an extension cord made at home and two Nema 17 motors. M5x10mm Openbuilds low profile screws and tee nuts were used for the base assembly, while six additional M5x8mm screws were used for the optional Openbuilds v-Slot end covers. Precision Egg Coupler can be found here: http://shop.evilmadscientist.com/productsmenu/51-accessories/208-coupler. Precision Tail Coupler is available at http://shop.evilmadscientist.com/productsmenu/753, and EBB Driver Board can be purchased at http://shop.evilmadscientist.com/partsmenu/188-ebb. The legs used are Middleman's Reach3D 2040 Short Support Bracket Feet, found here: http://www.thingiverse.com/thing:1967717. Two pairs of these feet are required for the 2080 Open V-Slot Linear Rail extrusion. To create a one-piece two-leg part, I superimposed the standard part with a mirrored part in my slicer. Two one-piece 3-rail feet hold the two 2040 extrusions together. The OpenBuilds Nema 23 and Nema 17 motor mounts, V-Slot end caps, and spacer block stl files used are OpenBuilds Parts by tjb1, found here: http://www.thingiverse.com/thing:215971. I 3D printed the Nema 23 motor mount bracket and spacer block, which are strong enough to perform without modification. However, the 3D printed Nema 17 motor plate required superimposing with the nikosEB_4.stl file in slicing software to create a modified egg motor mount that is plenty strong. The Precision Tail Coupler is designed for .25" shafts, while the Eggbot Pro and Niko's Egg painter use ball bearings. The other Eggbot models use plastic bushings, which were printed by superimposing the shaft_collar.stl file onto the nikosEB_4.stl file in slicing software. The pen arm used is the Distal pen arm for EggBot by tml, found here: http://www.thingiverse.com/thing:696294. The stepper_arm.stl file was mirrored to put the servo motor on the right-hand side, working with the EBB Driver Board. Two Thumb Screw Caps were used by artexmg (SetScrew1.stl), along with two M4x25mm screws and nuts for the pen arm, found here: http://www.thingiverse.com/thing:2042631. An additional M4 Thumbscrew was used to hold the Distal Pen Arm assembly to the pen arm shaft coupler. The pen arm shaft coupler is from nglasson's Improved printable eggbot, available at http://www.thingiverse.com/thing:263668 (Pen_Arm_Shaft_Coupler.stl).