Slot Bot, Large CoreXY Printer

thingiverse

Update 03-03-15 Installed hotend and now printing! Here's a video of it printing:https://www.youtube.com/watch?v=vVa2gHCmJDo Update, 02-15-15 Waiting on new hotend to arrive before I can test out my latest project. This is the Slot Bot! A large format CoreXY printer with 335mm X 335mm x 300mm build volume. Main frame made of 1.5" slotted angle in 2' lengths for a sturdy build. One goal was to make standardized frame from locally sourced materials. Home Depot, Lowes and Menards all carry 2' sections of slotted angle as well as longer ones. Stiff design only needs 3 X 5/16 or 8mm screws at each corner. Currently designed with 5/8" or 16mm rod for added rigidity. Found great deal on stainless steel rod and using Lm16uu bearings with no issues so far. Future upgrade planned to make 10-12 mm version of parts since 16 mm rod is overkill. The z-axis uses belt-driven design with two geared (27:1 ratio) nema17 motors, ditching screws altogether. Heated bed made from 1/8" thick aluminum plate and fiberglass heat tape as heating medium. Runs on 120VAC with solid state relay for power supply. Uses 400C-rated tape attached to plate with kapton tape, only drawing 2A of current. Instructions Parts Needed Non-Printed Parts: - 14 x lm16uu bearings - 28 x 8" Zip ties - 6 x 23.75" x 5/8" (16mm) steel rod - 24 x 5/16-18 x 5/8" Socket head cap screws - 12 x 5/8-16 x 5/8" (M8 x 16mm) Flat socket head cap screws - 32 x 5/8-16 (M8) stainless steel flange nuts - 36 x M4 Stainless Steel locknuts - 36 x 30mm M4 Stainless steel head scap screws - 16 x F625zz flanged bearings - 8 x M5 x 25 mm Socket head screws - 8 x M5 Stainless steel nuts - 10 meters GT2 belt - 4 x GT2 20 tooth pulleys - 2 x 58 oz-in Nema 17 Stepper motors - 2 x 26.85:1 ratio geared Nema 17 stepper - 1 x 21" x 20" x 1/8" Aluminum plate - 1 x 21" x 20" x 1/2" Wood board - 1 x Conrad 750°F Heat Tape - 1/2" x 8' - 120V - 1 x Solid State Relay SSR-25DA - 3 x Mechanical endstops - RAMPs board with 2560 Mega