Linear Rail Eggbot Derivative
Description
Does the world really need another eggbot? At first I didn't think so, but then I ran across Niko's eggbot design over on OpenBuilds (https://openbuilds.com/builds/niko%E2%80%99s-egg-painter-robot-openbuilds.1953/) and got super inspired. I loved the look of the extruded aluminum rails, but wanted a design that hid the ends and felt a little more balanced (where the egg motor was over the rail instead of being mounted off the side of it). This is my attempt - I hope this helps someone. Also, this is not a cheap project! I used Niko's pen arm STLs so have not provided those here. Instead of using a hardware store hinge for the pen arm, I cut out a piece of polypropylene and screwed it in. My goal was to eliminate the possibility of any slop in the mechanism. Polypropylene is a very resilient plastic for applications where it will be bent back and forth repeatedly. Mine came from a yogurt tub ;) I'm sure I missed something, so leave a comment if something isn't clear about the design and I'll try to get back with you. However, *I can't help you troubleshoot your own project or Inkscape*. Be sure to read over the Eggbot Wiki over at Evil Mad Scientist https://wiki.evilmadscientist.com/The_Original_Egg-Bot_Kit Note: Google Sketchup file is included **Original Size Images for Reference** Front View: https://thingiverse-production-new.s3.amazonaws.com/assets/13/be/f5/6d/a7/Front.jpg Side View: https://thingiverse-production-new.s3.amazonaws.com/assets/fb/87/08/57/09/Side.jpg Bottom View: https://thingiverse-production-new.s3.amazonaws.com/assets/ce/59/f7/c6/a2/Bottom.jpg **Video** https://youtu.be/qzW1a53-I5U **Parts from Open Builds:** 2 × Low Profile Screws M5 (10 Pack) (Length: 8mm) https://openbuildspartstore.com/low-profile-screws-m5-10-pack/ 1 × Low Profile Screws M5 (10 Pack) (Length: 10mm) https://openbuildspartstore.com/low-profile-screws-m5-10-pack/ 1 × Low Profile Screws M5 (10 Pack) (Length: 20mm) https://openbuildspartstore.com/low-profile-screws-m5-10-pack/ 1 × Low Profile Screws M5 (10 Pack) (Length: 27mm) https://openbuildspartstore.com/low-profile-screws-m5-10-pack/ 1 × Button Head Screws M3 (10 Pack) (Length: 6mm) (to attach pen arm motor to NEMA motor mount) https://openbuildspartstore.com/button-head-screws-m3-25-pack/ 1 × M5 Tee Nuts (10 Pack) https://openbuildspartstore.com/tee-nuts-m5-10-pack/ 2 × Ball Bearing 625 2RS 5x16x5 https://openbuildspartstore.com/ball-bearing-625-2rs-5x16x5/ 1 × V-Slot® 20x80 Linear Rail (Length:250mm) https://openbuildspartstore.com/v-slot-20x80-linear-rail/ 1 × Motor Mount Plate for NEMA 23 Stepper Motor (the NEMA 17 fits too) https://openbuildspartstore.com/motor-mount-plate-nema-23-stepper-motor/ **Parts from Evil Mad Scientist:** 1 x EiBot Board https://shop.evilmadscientist.com/productsmenu/188 1 x Precision Egg Coupler https://shop.evilmadscientist.com/51-products/accessories/208-coupler 1 x Aluminum Pen Arm Backer https://shop.evilmadscientist.com/51-products/accessories/702-albacker **Materials from Other Sources:** 1 x M5 tap to cut threads in the end of the extruded aluminum rail 2 x NEMA17 Stepper Motors 1 x MG90R Servo 1 x 5mmx100mm shaft https://www.amazon.com/gp/product/B076XW73Q7/ 2 x shaft collars (5mm bore) 1 x Knob to hold the pen (drill and tap the pen arm first according to Niko's instructions) 4 M3 screws to mount egg stepper motor 4 x little screws for the polypropylene pen arm hinge 4 x little screws to hold EiBot Board in place 9v, 1.5A Power Supply (center positive, 2.1 x 5.5 mm barrel plug) 1 x Spring (goes on the 5mm shaft to provide tension to hold the egg - I had one laying around) 1 x rubber stopper thingy 1/8" cable sleeve https://www.amazon.com/gp/product/B071G5L29C/ 1/4" cable sleeve https://www.amazon.com/gp/product/B071JH14WZ/ Heat Shrink Tubing **Software:** Inkscape http://inkscape.org/en/
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