3D printing

neilpf2014 edited this page Jan 28, 2018 · 13 revisions

FUBAR 3d printing page


3d printing overview

FUBAR has several working FDM 3d printers. These printers are all Reprap derivative printers that are an open source hardware / software design. We are using CURA as the slicer / G-code sender for the printers. We also have one printer setup with Octoprint as the printer controller


FUBAR Printers (working)

  • Lulzbot Mini
    3mm filament, auto bed leveling. All metal hotend, Can go to 300 c Lulzbot
  • Monoprice I3 (high temp)
    Enclosed with all metal hotend. Can go up to 300 c I3 high temp
  • Monoprice I3 (low temp)
    Up to 245 c I3 low temp

Use Guide

Printer etiquette

General use policies to avoid issues

Model files

3d printer model files are 2d meshes that enclose a 3d space. The most common file type is *.stl (stereo-lithography). Many CAD programs and 3d design programs can create these meshes. A gotca with these files is "holes", if the mesh doesn't completely enclose a 3d space the printer control software will not properly print your model. Generally the slicer will warn you about this.

Some places to find models and software for model design

CURA software (Slicer / printer control)

Cura is a opensource slicer and G-code sender. The slicer component turns the model into instructions (G-code) to send to the printer. These instruction can be streamed to the printer or save to file to be streamed by another program. We also have one of the printers controlled by Octoprint. Ensure that models that are sliced for the I3 run off of Octoprint are not sliced using the setting for the Lulzbot

The Cura slicer uses profiles (stored with the *.ini filespec) to determine setting such as extrusion and bed temperature, layer height, infill, print speeds, and other things specific to material and print quality. We strongly suggest asking someone with expertise for the proper profile to use for the material used to print

Filament

todo, Materials (PLA, ABS, other) pros and cons. Where to get, loading, and storage

The printer can use a variety of different thermoplastics such as ABS, PLA, PET, HIPS, (polystyrene), Nylon and others. The most common plastics used are PLA and ABS, We recommend printing with PLA unless it's properties don't suit your application (i.e. exposure to high heat or need for high strength

Table of plastics

  • PLA - Polylactic Acid: Melts at ~200 c, good layer bonding and no warping as it cools, this generally gives good quality results. PLA+ is as strong as ABS or stronger, all PLA is made from corn and non toxic.
  • ABS - Common plastic for all sorts of injection molded product Melts at ~240 c, Stronger then regular PLA and relatively heat resistant. Can have warping and layer bonding issues esp if not kept in temp controlled build chamber.

The Lulzbot uses 3 mm filament, I3 uses 1.75 mm. Although one might be able to load 1.75 into the Lulzbot you will not get good results.

Bed leveling and preparation (if needed)

todo How to check and Level I3's. How to ensure autolevel is working on Lulzbot.

Removing Printed items

todo how to do this without breaking the printer or injury

Troubleshooting failed prints

todo Common failures and how to correct

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