Prusa i3

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Prusa i3
Prusa i3
Status In progress

Intro

Members at Hackerspace have finally gotten around to finishing the assembly of this printer.

At the moment, the printer is still being calibrated/messed with.

Currrently, the printer is being optimised for ABS with an all metal Hexagon Hotend and a Wades extruder printing onto Kapton tape.

EDIT: As of 22/11/2014, now using ABS juice instead of Kapton tape.

The printer, printing!

What's been done

  • Printer fully assembled
  • Heated bed MOSFET moved to external heatsink
  • New Hexagon hotend to replace the unusable original hotend
  • Cooling fan for hotend fitted with zip ties
  • Printed loads of junk prints, like all printers
  • Finally fixed bug - when starting a print, Z goes up then goes back down and ignores endstop
  • Designed a part to attach a 40mm fan to the hexagon hotend: File:Hexfan.stl (needs printing)

What needs to be done

  • Optimise for faster than slowpoke speeds EDIT: DONE. Now back at default Slic3r speeds.
  • Continue messing with firmware for max accuracy and print quality.
  • Tidy the wiring (like this will ever get done?) EDIT: DONE. Sort of. Arduino/RAMPS now mounted correctly.
  • Try Nylon filament as it is not often printed due to high flow temperature.

Firmware

Latest firmware (A work in progress): https://github.com/mwidmski/Prusa-i3-Marlin-Firmware

Heated Bed

The PCB heat bed has been replaced with a 230v silicone heat pad attached to a sheet of borosilicate glass. Here is a teardown video of the cheap SSR that is using the old 12v line that was powering the PCB bed to switch 240v Older Firmware: https://github.com/33d/marlin-i3