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TOME - Portable 3D Printer

Portable and self contained FDM 3D printer designed to be the ideal tool for field hospitals short on supplies and nomadic engineers alike.

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This project was created on 06/10/2014 and last updated 4 days ago.

Description
The overall dimensions for this project are subject to change but are currently 4" THK x 8" x 11" when folded, with a print volume of a 5" cube. The TOME will have an integrated battery pack (Battery chemistry has not been decided) and a removable filament reel cartridge. Current plans are to make this a PLA only printer with a heated bed for better adhesion. Custom designed XYZ drive and extruder, full CAD and assembly drawings will be available as components are finalized.

More to come!
Details

Current Build progress:

Preliminary Goals: 

1. 4 Hours of print time on battery, 6 with extended battery pack

2. Two filament cartridges: Standard will hold enough filament to print a solid 3" cube, extended will hold enough filament to print a solid 5" cube

3. Accessible hot end that is easy to remove and replace

4. Wireless printing and distributed printing. TOME printers will be Wifi enabled to allow a desktop application to distribute larger files among several printers. There has also been discussion about allowing "Print sharing" where TOME users can make their TOMEs position be shared and allow other users to request prints. 

5. Auto leveling bed: An actual auto-level feature will enable printers to work remotely with minimal operator interference. 

The goals for this project may evolve to encompass more features as this project matures. 

Components
  • 2 × NEMA 14 Stepper Motor X, Y, and Extruder drive motors
  • 2 × NEMA 8 Stepper Motor Z- axis Drive motors
  • 3 × Sparkfun ROB-09454 IR distance sensor for end stops
  • 2 × Lower Motor Mount https://www.shapeways.com/model/2069980/motor-mount-v1.html?modelId=2069980&materialId=6
  • 8 × M3x1.00 10mm Lg Socket Cap Screw Mcmaster: 91239A115
  • 8 × M2x1.00 10mm Lg Socket Cap Screw Mcmaster: 91239A706
  • 2 × Anti-Backlash compression spring Mcmaster: 9657K306
  • 4 × Brass 1/4-20 UNC Hex Nut Mcmaster: 92676A029
  • 4 × X / Y Drive Axis Spindle Bearings Mcmaster: 638K17
  • 8 × #2-56 x 0.13 Lg Socket Head Scr Mcmaster: 91251A072

See all components

Project logs
  • TOME Test Rig

    4 days ago • 0 comments

    I was able to pull myself away from my other projects to give the TOME some love tonight. I've had this makerbeam sitting around for quite some time, generally I use it for quick test stands or supporting rigs for projects that i'm working on. The TOME rear plate will be re-cut in order to attach to the frame properly (Zip ties are temporary). I feel that attaching the backpane assembly to a rigid test fixture will enable us to perfect the mechanism and get great prints. Once we fine tune the motion mechanism we will make the TOME fold, this will help narrow down causality if our print quality degrades once the folding mechanism is instituted. 

    The StepperStack 2's arrived today and are currently wired up on the test board below. We are using an Arduino Uno, with a spare Joystick breakout from Sparkfun to drive the StepperStack 2's. The goal is to have a very rudimentary drive setup just to test the mechanism, the first prototype will then transition over to the Sanguinololu once we are ready to start printing. The goal is to spin our own board for the first portable prototype, for now our effort needs to be focused on finishing the XYZ Drive mechanisms. 


    The FDM 3D printer we are using to prototype parts is printing everything undersize, and any hole is oblong making it tricky to get our parts to fit properly. We are discussing SLS printing with a local company here in AZ, if all goes well we will have more accurate parts to work with. Currently you can actuate the Z-axis carriage (with spindle installed) by turning the Z-axis lead screw, however due to tolerance issues caused by the 3D printer we are using we cannot spin the X-axis spindle just yet. I'm going to adjust the spindle model to give us some clearance just for this test print so we can get one half of the drive mechanism moving under power. Stay tuned!

  • Stage 1 Video

    11 days ago • 0 comments

    Here is the first round video for the TOME, we're hoping to have much more to show soon and are working on this project as much as our schedules allow. 

    Stay tuned!

  • System Diagram V1

    14 days ago • 0 comments

    Below is the preliminary system block diagram, I noticed a few mistakes once i uploaded it so I will update the diagram before the deadline on 8/20. Filming for the video wrapped up today and I will be making the necessary edits before uploading it to Youtube which will hopefully be done sometime Tomorrow night or Teusday afternoon. 

View all 25 project logs

Build instructions
  • 1

    3D printed parts can be found at this Shapeways Shop:

    https://www.shapeways.com/shops/RTH-Robotics?s=0

Discussions

Jasmine wrote 16 days ago null point

Hello Philip & Corey.
I just wanted to remind you of what must be on Hackaday Projects by August 20th for TOME to be considered for the next round of The Hackaday Prize:
- A video less than 2 minutes long describing your project. Put it on YouTube (or Youku), and add a link to it on your project page.
- At least 4 Project Logs
- A system design document. Please highlight it in the project details so we can find it easily.
- Links to code repositories, and remember to mention any licenses or permissions needed for your project. For example, if you are using software libraries you need to document that information in the project details.

You're Astronaut or Not tshirts should be with you shortly. Thanks for entering and good luck!

Are you sure? [yes] / [no]

Dean Gouramanis wrote a month ago null point

StepperStack Revision 5 is tested and working flawlessly. Production starts next week. I will send a sample.

Are you sure? [yes] / [no]

samern wrote 2 months ago null point

Hi Philip. I love this idea and will be the first in line to buy/build one. Can you tell me if you plan to allow for the unit to be plugged in at the same time (e.g. in case it will be clear 4-6 hours of battery will not be enough)?

Are you sure? [yes] / [no]

Philip Ian Haasnoot wrote 2 months ago null point

Hi Samern, thanks for commenting.

The plan is to include a wall power adapter with the tome so that it can be run via a standard outlet for longer prints. The deciding factor for the power supply specs will depend on what is considered to be an acceptable charging rate.

Most likely we will supply the TOME with a 12V power supply which will give the community the option to upgrade to any suitable alternative power supply if they wish to have faster charging rates; The maximum charge rate will depend on what type of battery chemistry we ultimately come to an agreement on. I would still love to use LiFePo4 cells, however the power density makes it a more difficult chemistry to use for this application.

If you were the end user, what would an acceptable charge time be? Personally I think a 2-3 Hour charge time while not printing, and a 4-5h charge time while printing would be acceptable.

Are you sure? [yes] / [no]

samern wrote 2 months ago null point

Hi Philip,

Thanks for your response. I have no issue with your charging times. I think they are pretty standard for the sort of thing you are doing. Plus, if I leave it plugged in all the time and only take it off when I am truly going portable then it is what it is. It's too bad a USB's 5V is not enough to drive all the electronics, motors and hotend, but I think the charge time (and the power supply you provide) also is going to depend on whether one day you choose to allow for ABS as well as PLA. Heck if it were viable, I'd rig a solar panel to it and go totally green.....

Are you sure? [yes] / [no]

Philip Ian Haasnoot wrote 2 months ago -1 point

It's funny you bring up the Solar Panel idea, I actually was an engineering consultant for BioLite LLC and plan to illustrate how the TOME can be charged using alternative sources of power. Solar, BioLite stoves, wind, even pedal power would be usable to charge the device. I've also built several solar powered race boats and have experience with solar arrays. The charge time would vary depending on the Kw output of the solar array, I'm wondering now if it may be useful to include suggested alternative energy layouts for charging the TOME off-grid.

Are you sure? [yes] / [no]

Jasmine wrote 2 months ago null point

Hello Phillip, your project has been featured over on http://hackaday.com/2014/07/09/thp-entry-tome-the-portable-3d-printer/ today.

Also, did you know you if you go to edit your project you can put links to other sites in the left hand side? It's a good way to show off where you have been featured.

Keep up the great work.

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Adam Fabio wrote 2 months ago null point

Desktop 3D printing is almost at a point where it's a "mature hobbiest" technology - but it would be great to see it make it's way into places where it can save lives. You've got a great idea in TOME, Thanks for submitting it to The Hackaday Prize! I love your CAD views, but don't forget about the real pictures are your parts take shape in the physical world.

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Philip Ian Haasnoot wrote 2 months ago null point

Thank you for the comment Adam. I think it is funny you should mention bringing our designs into the physical world as it is precisely what we began doing today. Corey and I have extensive backgrounds in manufacturing and the equipment necessary to fabricate the TOME in our personal inventory. Please keep up to date on our project, the cadence will be dramatically increasing very shortly.

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