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Thread: 3D printed boats

  1. #61
    Join Date
    Nov 2004
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    New Hampshire, USA
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    901

    Default Re: 3D printed boats

    Nap, our boats are printed as one structure, with deck and canoe hull as an integral unit. I think it reduces warping and results in a more rigid hull.

    Another tip: We found that the printer doesn't like flat horizontal surfaces either. If you look at our pictures, you can see that things like the bulkhead of the mast well are sloped at about a 45 degree angle.

  2. #62
    Join Date
    Nov 2010
    Location
    Johannesburg
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    224

    Default Re: 3D printed boats

    Sweet, thanks.
    I actually stared at one of the pics on the printbed and saw that the angle was about 45...... which dawned on me is the angle most printers can deal with....... and then I changed mine in cad lol.
    Emulation is the highest form of flattery after all :P

  3. #63

    Default Re: 3D printed boats

    Quote Originally Posted by Naptalene View Post
    Bill,
    The warping is a pain with large, thick flat surfaces in ABS. I'm hoping I can get the thin walls of a hull dialed in without issues.
    I have built an enclosure using 20x20 aluminium with sliding perspex sides to cut down drafts - it definately helped out. Annoyingly my original cardboard box had better heat retention than the perspex - This looks great but doesn't function as well so - go figure:(
    Next step is to move the controller electronics below the building bed or outside the enclosure. The cooling fans on them are moving too much air around inside the print area for my liking so that may be contributing to the issue.
    And finally I should get a little temp controller like the brewers use to control heat (stc1000) and set that up to maintain air temp around the build but that's for later lol.
    Aluminum is a better heat conductor than cardboard causing more heat loss.
    To avoid warping, ABS needs a "heated printer bed" and a temperature controlled area. Best works with closed case printers not the ones that are open all around.
    On the other hand since it is a petroleum-based material (Acrylonitrile Butadiene Styrene) and has a high melting point (210-250celcius) it produces toxic fumes so it must be used in a well ventilated area.

    I read that some people work with PLA (Poly Lactic Acid) which I don't think is a good idea since it's sugar-based and biodegradable. It absorbs moisture and has a lower melting point than ABS thus making weaker bonds.

    As for wall thickness you may try, instead of printing a solid wall, print a thin external surface with a thick mesh inside (honeycomb or rectilinear pattern). You could even get it to be lighter than with solids.

    We will soon start tests for a Marblehead using carbon based filaments. The original Esterel idea was abandoned (sorry Claudio) I will keep you informed as soon as we have our first prints.
    Smile! Ιt makes people worry.
    GRE 07

  4. #64
    Join Date
    Apr 2005
    Location
    Toulouse (Fra)
    Posts
    3,211

    Default Re: 3D printed boats

    Hi Abi,
    Esterel abandoned ! There will be another time for sure !!!
    Cheers
    ClaudioD
    Last edited by claudio; 05-25-2017 at 04:08 PM. Reason: modified text

  5. #65
    Join Date
    Nov 2010
    Location
    Johannesburg
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    224

    Default Re: 3D printed boats

    Thanks for the input.

    I run my abs at 230 in a sealed enclosure, bed temp at 110C. To kill the smell you can chuck some activated carbon in the enclosure to absorb the smell or vent it outside via a tube.
    The carbon filaments seem to be housed in either PLA or nylon based filaments. Selwyn is sticking to PLA as his choice and I've made some seriously strong bits for my new printer with Petg and Prusa's cube infill. It's awesome!!!

    Have you had a chance to do trial runs on any filament? I'm almost done assembling the new printer and will then start doing some test runs on the rg65.

  6. #66

    Default Re: 3D printed boats

    One of the materials to be tested is Ultimaker PC (polycarbonate) filament. I think is the same stuff many crash helmets are made from.
    Unfortunately Nylon also absorbs moisture so it should be avoided.
    Generally the better the material the harder it is to setup the printer correctly. It needs many test hours and meters of filament lost. But when you get it right.......
    Since November we have been printing non-stop with two SLA printers and a paper one, so we had no time to test our plastic one.
    Now we will first upgrade it and make sure we place a hardened steel nozzle. We did a mistake in leaving our existing filaments exposed all this time, so we must make sure we get rid of any moisture absorbed. New filaments will be correctly stored from the beginning.
    Smile! Ιt makes people worry.
    GRE 07

  7. #67
    Join Date
    Nov 2010
    Location
    Johannesburg
    Posts
    224

    Default Re: 3D printed boats

    I'd be very interested to see the polycarbonate products.
    How do you glue it?

  8. #68

    Default Re: 3D printed boats

    Smile! Ιt makes people worry.
    GRE 07

  9. #69
    Join Date
    Aug 2003
    Location
    Minnesota USA
    Posts
    3,809

    Default Re: 3D printed boats

    Bill just caught up with this thread and have to ask the logical question regarding "Shrink" (or the clear) design.....


    How much cost are we looking at if one hull, keel, rudder and bulb. Thought of possibly giving it try up here and curious what costs am I looking at? I just started with templates for a 2 meter catamaran so not sure when I would proceed on another RG65, but still interested in costs either as a one-off prototype - or from an initial production run. Email please Formula48@comcast.net

    Thanks, Dick

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