Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: 3D printing & sextants - a few surprises
    From: Lu Abel
    Date: 2014 Jan 09, 10:42 -0800
    Eric:  

    I read this with interest.  

    While 3D printing for the masses today must be on easily melted plastics, I was aware of 3D printing of metals, so Surprises 1 and 2 were reasonable.   But just as I exclaimed to myself "yeah, but the cost was astronomical as compared to ordinary machining," you offered Surprise 3.    That's amazing!

    In the past few weeks there was a filler on one of the US TV news broadcasts about 3D printing's move into real-world manufacturing.   But that news piece, after touting all the benefits of 3D printing of, say, stamping molds for forming car bodies said that costs still far exceeded the costs of traditional alternatives.

    There has been discussion on another list that I'm on where some of the advocates of 3D printing claim that it will form the basis of a second Industrial Revolution.    The first give us mass-produced goods at very low prices; this second one will potentially give us custom goods at equally low prices.

    I live in the Silicon Valley area.  Not only have we seen the first retail shop open where one can get a 3D design printed at a reasonable cost on a quality printer, but libraries in two of our communities have installed 3D printers for the masses to use!

    Lu


    On 1/9/2014 10:03 AM, Eric van der Veen wrote:

    Friends,

    A word on 3D printing following recent posts.

    It is a misconception that 3D printing is limited to floppy plastics.

    Today in the office I had the opportunity to inspect a titanium(!) 3D-printed part.

    This was piece approx. 3 cm in diameter, approx. 7 mm thick. It was designed for a miniature satellite rocket nozzle, and manufactured for us by a Belgian company.

    Surprise 1. This was not done by sintering, as is usual in 3D printing of metals. This was more like a cast on micro-scale with a 3D printer with a very hot printhead and printbed. Thus the result has the same properties (strength!) as if it was machined titanium. Very light, very strong. Incredible.

    Surprise 2. This unit featured approx 10 holes through the full thickness. Holes were diameter 0.3 mm (!!!!). Try that with a drill. You won't succeed, as all but the most expensive drills will break.

    Surprise 3. A machined equivalent (if the drills work out) would be 1-2 days labour, totalling approx. $1200. This 3D piece..... approx $300.

    So, for all you people doing sextant repair, restoration or manufacture...I suggest you keep a close look on how 3D printing technology evolves. It will open possibilities beyond what we can imagine today.

    Eric
    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com
    ----------------------------------------------------------------

    View and reply to this message: http://fer3.com/arc/m2.aspx?i=126253


       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site