Hlidskjalf (Odin's Chair)

thingiverse

"Hlidskjalf" is my dual CoreXY, extremely expensive 3D printer. "CoreXYU" coined by dc42 on the RepRap forums.http://forums.reprap.org/read.php?397,737863 https://www.youtube.com/watch?v=mMRnG_n2i84 Extruders are done: http://www.thingiverse.com/make:258333 Build volume covered by both heads: 13.37" square x 15.75" High, or 34 sq x 40cm Tall. Left print head: "Hugin", E3d-v6 300c 24V hot end with Toranado extruder. Right print head: "Munin", Prometheus v2 300c 24V hot end with Toranado extruder. Electronics: RADDS v1.5 board with 2x driver extension and 8x RAPS128 stepper drivers 6x NEMA17's 76oz-in for axis, 2x NEMA 14's 15.6oz-in 0.9deg for extruders Arduino Due r3 microcontroller with 7" Panel Due touch screen RepRap 24V PCB Heatbed 300mm x 300mm TDK-LAMBDA FPS1000-24P 1000W PSU Hardware: 2x RM1605 x 550mm ballscrews with anti-backlash nuts and FF12/FK12 end supports 8x MGN x 500mm linear guides with12x MGN12H guide blocks Misumi USA aluminum extrusions Odin, give me the strength to finish this project, because I've already spent my wealth! How I Designed This Hlidskjalf project guide . My inspirations: https://www.bcn3dtechnologies.com/en/catalog/bcn3d-sigmahttps://folgertech.com/products/folger-tech-ft-5-large-scale-3d-printer-kithttp://www.openbuilds.com/threads/c-bot.726 Design challenge: 2 head open frame driven by core-XY with CNC capabilities. Phase1, Single core-XY. SIngle head prints. Phase2, Dual core-XY, 2x head implementation. Phase3, link X-carriages for CNC, flexible shaft Dremel for spindle. Requirements: Optimize XY torque and precision at 100mm/s feed rates, rapids up to 300mm/s. Minimum print build of 300 x 300 x 400mm, with heated bed. Maximize rigidity with open frame construction. Minimize reciprocating mass. 300c direct drive extruders. Aesthetics and DFMA. Conclusions: 24V system to maximize stepper and heater efficiencies. Linear guides for best of class rigidity and low coefficients of friction. Z axis ball screws to position work for CNC. Max torque 25mm/s, Rapids 150mm/s. Core-XY with steel cord Urethane GT2 belts. 2:1 primary XY drives, 10mm/rev output. 32 bit micro controller for dual core-XY to achieve speed and accuracy.