Delta Hover Extruder -No Ooze

thingiverse

Video: https://www.youtube.com/watch?v=PqW18kimKDQ The Delta Hover Extruder seamlessly integrates the benefits of bowden driven delta printers (rapid speed and light weight hotend-base/effector) with those of direct drive extruders (zero oozing/no unnecessary material waste). The extruder hovers about 140mm above the hotend. This shorter distance between the extruder and effector significantly reduces friction and boosts direct traction exponentially. With a standard retraction setting of 2-3mm, I experienced no oozing and consistently accurate material usage. The extruder is positioned at the center of the carriages (linked with rubber-band or springs). To minimize additional weight, I installed a counterweight on the Z-tower connected by a cord and two bearings, mimicking an elevator system. The impact of the added weight is virtually negligible. This system is compatible with nearly every existing delta printer bowden extruder. Partlist: 1x Any existing bowden extruder for your delta printer; I utilize the extruder from schlotzz (http://www.thingiverse.com/thing:275593) 1x bearing 8mm inner diameter 1x bearing 5mm inner diameter 1x threaded rod M8 (length depending on your printer size) 4x M8 Nut for threaded rod 1x M5 Screw and Nut for small bearing 1x long cord or flexible filament (length depending on your printer size) 1x some springs or rubber band(s) Instruction: Print the Delta Hover Extruder parts from here: a) 1x Delta Hover Extruder Roof b) 1x X-Attachment c) 1x Y-Attachment d) 1x Z-Attachment e) (Optional) 1x bearing case for the rod or use 2 flat washer f) (Optional) 1x counter weight container or use a bag filled with the same mass of the extruder :) Assembling: a) Secure the Delta Hover Extruder roof part with cable ties on the motor of the extruder. b) Position the extruder above the hotend and connect it to the carriages using rubber bands or springs. Subsequently, determine the optimal length and material for these elements to reduce vibration and prevent oscillation at fast speeds. c) Mount the bearing in the middle of the threaded rod (with a flat washer or optional bearing case) and secure the rod with the X and Y Attachments on the printer frame using screws or cable ties, ensuring the counterweight cord on the bearing aligns vertically with the cord attachment of the Delta Hover Extruder roof part. d) Mount the Bearing on the Z Attachment and attach it to the frame at the z tower end. e) Identify a counterweight equaling the extruder mass (I use an additional NEMA motor in a bag). Connect the Delta Hover Extruder and counterweight with the cord. Verify the balance of the extruder and counterweight by moving the system up and down. f) Trim the bowden to the correct length, ensuring the extruder is about 10mm below the level of the carriages. g) Connect the Delta Hover Extruder and hotend using the bowden. h) Enjoy printing without ugly oozing!!! Additionally, you can print my Flex-Filament Adapter (http://www.thingiverse.com/thing:1338205) to prevent issues when printing flexible filaments. If you've designed a customized or universal Z Attachment, please let me know. Print Settings: Printer Brand: RepRap Printer: Delta