Re: 3D Printers

From	DJ Delorie <dj@delorie.com>
Newsgroups	sci.electronics.design
Subject	Re: 3D Printers
References	(13 earlier) <10d3h9n$2oqkf$1@dont-email.me> <xnbjm2dtmm.fsf@delorie.com> <10d4lo9$2vuea$2@dont-email.me> <xn347de9gk.fsf@delorie.com> <10d6fra$3honb$1@dont-email.me>
Date	2025-10-20 21:07 -0400
Message-ID	<xny0p5cb9t.fsf@delorie.com> (permalink)

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Don Y <blockedofcourse@foo.invalid> writes:
>> Print-in-place translucent patches are something modern 3D printers
>> can do.
>
> Switch to a different filament material as they pass the "opening",
> then switch back?

The way they work, they put down all of filament A in the layer, then
all of filament B, etc, then go back to A for the next layer.  Filament
switches are considered expensive.

>> But I think they'd fall short of "clear".  You can see light through
>> them; you can't read through them.
>
> I imagine the number/thickness of the passes would have an effect.

http://www.delorie.com/photos/3d_prints/img_3376.html

The problem is that there's usually tiny air gaps between the filaments,
so you get lots of tiny lenses.  The above was overextruded a LOT and
printed HOT to try to remove those pockets, as an experiment in printing
PETG lenses.  Even so, the top and bottom layers (unless printed against
a smooth print plate) would have extrusion lines.

> E.g., the mitigation board on our ACbrrr has several small LEDs
> located right next to each other.  Would you be able to tell
> how many are lit -- and *which*?  Or, would you have to rely on
> them being different colors (so you see red, yellow, orange and black
> instead of red & off, yellow & off, reg & yellow, both off)?

You would print light barriers (opaque) into the back of the panel to
guide the light to where you wanted it.

> OK, that's easier to understand.  The restriction for hysterical raisins?

Cheap 8-bit microcontrollers, plus no need.

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3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-16 18:53 -0700
  Re: 3D Printers Martin Brown <'''newspam'''@nonad.co.uk> - 2025-10-17 09:45 +0100
    Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-17 02:05 -0700
      Re: 3D Printers Martin Brown <'''newspam'''@nonad.co.uk> - 2025-10-17 12:11 +0100
        Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-17 04:53 -0700
  Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-17 13:20 +0100
    Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-17 08:22 -0700
      Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-17 19:24 +0100
        Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-17 13:27 -0700
          Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-18 11:02 +0100
            Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 06:20 -0700
              Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-18 15:36 +0100
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 07:58 -0700
              Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 18:01 -0700
                Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-19 08:37 +0100
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 01:04 -0700
                Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-19 11:11 +0100
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 04:26 -0700
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 04:52 -0700
                Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-19 16:46 +0100
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 13:22 -0700
                Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-20 01:33 -0400
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 23:44 -0700
                Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-20 14:04 -0400
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-20 16:15 -0700
                Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-20 21:07 -0400
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-20 18:38 -0700
                Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-21 11:58 -0400
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-21 09:47 -0700
                Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-21 13:28 -0400
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-22 01:22 -0700
                Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-20 15:19 +0100
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-20 07:50 -0700
        Re: 3D Printers albert@spenarnc.xs4all.nl - 2025-10-18 09:17 +0200
      Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-17 20:22 +0100
        Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-17 13:42 -0700
          Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-18 11:25 +0100
            Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 07:39 -0700
              Re: 3D Printers Theo <theom+news@chiark.greenend.org.uk> - 2025-10-18 17:17 +0100
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 09:41 -0700
          Re: 3D Printers antispam@fricas.org (Waldek Hebisch) - 2025-10-18 12:36 +0000
            Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 06:52 -0700
              Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 02:03 -0700
      Re: 3D Printers albert@spenarnc.xs4all.nl - 2025-10-18 09:12 +0200
      Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-19 00:44 -0400
        Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 22:04 -0700
          Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 22:08 -0700
            Re: 3D Printers liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2025-10-19 10:34 +0100
              Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 03:44 -0700
          Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-20 00:53 -0400
            Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 22:08 -0700
              Re: 3D Printers DJ Delorie <dj@delorie.com> - 2025-10-20 01:50 -0400
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-19 23:59 -0700
                Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-20 00:01 -0700
    Re: 3D Printers john larkin <jl@glen--canyon.com> - 2025-10-17 08:32 -0700
      Re: 3D Printers Bill Sloman <bill.sloman@ieee.org> - 2025-10-19 02:10 +1100
        Re: 3D Printers john larkin <jl@glen--canyon.com> - 2025-10-18 09:09 -0700
          Re: 3D Printers Lasse Langwadt <llc@fonz.dk> - 2025-10-19 03:46 +0200
            Re: 3D Printers john larkin <jl@glen--canyon.com> - 2025-10-18 20:11 -0700
            Re: 3D Printers liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2025-10-19 10:34 +0100
              Re: 3D Printers Lasse Langwadt <llc@fonz.dk> - 2025-10-19 14:41 +0200
                Re: 3D Printers liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2025-10-19 15:29 +0100
                Re: 3D Printers Lasse Langwadt <llc@fonz.dk> - 2025-10-20 17:35 +0200
                Re: 3D Printers liz@poppyrecords.invalid.invalid (Liz Tuddenham) - 2025-10-20 17:22 +0100
                Re: 3D Printers Lasse Langwadt <llc@fonz.dk> - 2025-10-21 01:17 +0200
          Re: 3D Printers Bill Sloman <bill.sloman@ieee.org> - 2025-10-19 16:32 +1100
      Re: 3D Printers Lasse Langwadt <llc@fonz.dk> - 2025-10-19 03:41 +0200
        Re: 3D Printers Don Y <blockedofcourse@foo.invalid> - 2025-10-18 20:38 -0700

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