Itty Bitty Double Extruder (with mount for MakerFarm Prusa i3v)

thingiverse

UPDATE: A Hardware Kit is Now Available! Click Here! I'm Proud to Introduce the Itty Bitty Double Extruder, a Two-Material Belt-Driven Extruder with Mounting Hardware for MakerFarm i3v Printers. This Versatile Extruder Comes in 3mm and 1.75mm Filament Versions. The Extruder Should Be Easily Mounted on Any Printer That Can Accept a Standard Hinged Accessible Extruder. Key Features: For Original Hexagon Hot Ends on 20mm Centers (Note: Not Hexagon AO) NEMA 14 Motors GT2 Belt Drives with Printed Pulleys Integrated Servo Z Probe Cam-Lock Idler Bearing Pins Uses Standard Hobbed Bolts Available Here The Extruder Is 2mm Narrower and 2g Lighter Than the Stock MakerFarm Extruder. It Includes Mounts for Prusa i3v with Integrated Hot End Cooling. Discussion Thread: Http://3DPrintBoard.com/Showthread.php?8848-Itty-Bitty-Double-Extruder See Instructions for a List of Vitamins Needed for Assembly. Note: You Will Need to Use Firmware That Will Lift the Z Axis When Deploying and Stowing the Probe to Prevent It from Hitting the Bed. If You're Using Marlin, Check Out This Thread: Http://3DPrintBoard.com/Showthread.php?6165-Marlin-Firmware-Fork-for-MakerFarm-i3v-with-Auto-Bed-Level-and-Roxy's-Enhancements. Instructions Detailed, Step-by-Step Assembly and Calibration Instructions Can Be Found Here: Http://Clough42.com/Instructions/Ibde-Assembly/ Files Are Provided for 3mm and 1.75mm Versions of the Extruder. You Can Print All of the Pieces Separately or Use the Provided Plates of Multiple Parts. To Assemble, You Will Need to Print: IttyBittyDoublePlate1.STL IttyBittyDoublePlate2-1.75mm.STL or IttyBittyDoublePlate2-3mm.STL Two Copies of Parametric-Pulley-80-8-Hex.STL (These Will Fit on Plate 1 If Your Printer Can Print a Whole Bed of Parts Cleanly Without Oozing or Warping) In Addition to the Printed Parts, You Will Need the Following Vitamins: Hobbed Bolts with Nuts (2) Available Here: Http://Clough42.com/Go/Product/Hobbed-Extruder-Bolt/ Hexagon Hot Ends (Note: Not Hexagon Ao) (2) NEMA 14 Stepper Motors (2) Available Here: Http://Clough42.com/Go/Product/Nema-14-Stepper-Motor Hxt-900 Servo Available Here Z Probe Switch 25x25x10mm Fan for Hexagon Cooling, Recommended Here 40mm Fan for Print Cooling Ramps Fan Extender If Using Software Fan on Ramps Stepper Driver If Your Ramps Board Requires One Assembly Notes: Heat New Hexagon Hot Ends to Temperature and Tighten Both the Nozzle and the Down Tube into the Heat Block Before Installing in the Printer. If You Don't, They Will Leak. Remove Support Material from the Bottom of the Filament Channels. You Can Install the Double Groove Mount Either Side Up, Depending on How Your Printer Bridges the Bottom of the Hot End Pockets. The 25mm Fan Should Be Installed with the Air Blowing Up (Drawing Air in Over the Hot Ends). Make an Insulator with Some Fiberglass and Kapton Tape to Install Above the Hot End Heat Blocks. If You Don't, the Hot End Cooling Shroud Will Melt. You Can Feed All of the Wires Up Through the Channel in the Center of the Block. Force In Some Scraps of 3mm Filament and Zip Tie as a Strain Relief. You Will Need to Orient the Heat Blocks Properly for the Wires and Z Probe to Clear. See Photos. You May Need to Adjust Your X Carriage So the Extruder Tips Are at the Same Height. As Long as You're Using Auto-Bed-Leveling, You Can Usually Get Enough Adjustment by Turning One of the Z Motors by Hand to Tilt the Whole X Axis.