Eiffel

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Next Actions

  • Make Drawing.
  • Make lots of grid beam. ~ 500-1000 feet of .5 inch^2 to .75 inch^2 would be good.
    • We need .5 to .75 acrylic sheet. Long skinny offcuts will work. A full 4'x8' sheet will make a huge amount of material.

NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??

Cost: A full 4'x8' sheet is very expensive. NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??NUMBERS??

  • Obtain fasteners
    • Prepare proposal for Local Fasteners stores:

{Motivation, solicit at-cost or free donation.} Pick-and-mix, then several gross.

  • Play
  • Distribute to Arch grad students and children.
  • Ask Zach and Adrian to make lots of gears with their laser cutters..

These are raw notes I'm trying to hack together into a design proposal. You are welcome and invited to edit and improve this page. Critique should go in 'Design Analysis' or in the 'discussion' tab above.

Design Proposal/Abstract

TriLap will be a steel square-tube CNC router made with tri-lapping joints, aka Tri-Joints with File:NEED-trijoint example.jpg Note that this is slightly similar to LumenLab's RogR, but will be cross-fertile with RepRap.

We can if we want try to extend this use of gridbeam and erector-set like technology into a RepRap_Building_System or RBS system that leverages RepRap to make lots of mechatronic systems using grid beam and grid sheet, and 3D printed gears, etc., but that's sort of beyond the scope of this project. (Step 2, technically)

It will use RepRap technology for 3D printing and either RepRap or emc2 for software motion control. It will use RepRap electronics or Gecko brand Stepper Motor Controllers for hardware motion control.

We will attempt to engage the LumenLab folk, if they are interested, and are willing to use the GPL license.

Abstract It will have a work volume of 24" x 48" x 8". It will be made from square steel tubing, drilled for bolting together in tri-joints.

Users User wants and needs: Journeyman (just graduated) architecture student, who will need CNC router/3D printer for modelmaking and crafting.

Also: FabLabs, RepRap users, hobbyists (RC plane folk cut a lot of balsa on medium scale CNC routers) and educators.


Design Philosophy The RepRap has successfully made a 3D printer using the GPL for a licenense. TriLap will do the same, and will leverage and contribute to RepRap technology and community. We will use the GPL and the RepRap wiki to be able to freely interoperate with standard RepRap hardware and software.

(AFAIK) There is no mature and published GPL-based CNC router. TriLap will fill that space.

Design Analysis ACTIONITEMACTIONITEMACTIONITEMACTIONITEMACTIONITEMACTIONITEM

Note to reader: does this plan make sense?

1) Can we build it? 2) Will it work?

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Capabilities

  • Work volume of 24" x 48" x 8".
  • Wood cutting - ~100% duty cycle.
  • Metal cutting - light aluminum and other non-ferrous cutting.
  • Steel - drilling.
  • 3D printing:

1) Thermoplastic: like a normal RepRap

2) Powder Printer: Shem wants one. Why not?

Fabrication/Tooling It will be made from square steel tubing, drilled for bolting together in tri-joints. It will _not_ require a normal machine shop.

Steel Chop Saw

Drill Press

Maybe benchtop CNC mill for fittings, but would greatly prefer having mother TriLap or other cnc router, 3D printer make fittings from Filled_Epoxy.

Materials

  • Structure: square steel tubing
  • Rails: 1" Gas Pipe or better
  • Toothed Belt for X, Y
  • Threaded rod for Z

Cross-Connectors, Fasteners Mother TriLap or other cnc router, laser cutter and 3D printer make fittings from Filled_Epoxy. Technically, the machines will make the molds for the fittings, and then we pour filled epoxy in the molds to make the fittings, etc.

Does it drill holes in the beams of it's daughter machines? You can.

But for the first one, it's much much faster to source pre-drilled square steel beams. McMaster-Carr down in the US has it, and local construction suppliers _everywhere_ should be able source it given 2 months forewarning. http://www.mcmaster.com/#steel-structural-tubing/=49tu63

Once you've got a machine, it's really easy to make lots of wood grid beam. And maybe you can drill holes in steel with it. It would be convenient, and a useful target benchmark. It would be hard to make this as good as a Taig Mill, but fun to try.

How do we generate G-Code from blender for cutting the outsides of stuff. You know, 80% of normal CNC routing? I need to dig up an email with some open source CAM programs. NOTENOTENOTENOTENOTENOTENOTENOTENOTENOTENOTENOTENOTENOTE

Notes:

I like the idea of a steel square-tube solsylva-like machine which is potentially dis-assembleable for the more nomadic fledgling architects. (Using what the gridbeamers.com folks call 'tri-joints').

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