Re: 3D Printers

From	DJ Delorie <dj@delorie.com>
Newsgroups	sci.electronics.design
Subject	Re: 3D Printers
References	(16 earlier) <10d6fra$3honb$1@dont-email.me> <xny0p5cb9t.fsf@delorie.com> <10d6o71$3jr48$1@dont-email.me> <xntszsckms.fsf@delorie.com> <10d8dfv$2e0c$1@dont-email.me>
Date	2025-10-21 13:28 -0400
Message-ID	<xnplagcgfj.fsf@delorie.com> (permalink)

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Don Y <blockedofcourse@foo.invalid> writes:
>> Yup, if they were up against the clear plastic.
>
> Your photo suggests that was the case.  Did putting some air between
> the "lens" and the target result in a "less transparent" result?
> (it seemed like it could tolerate a bit of a gap without a significant
> loss of clarity)

The non-smooth top would distort the image the further away it was.

Note: that test was on my first printer; I haven't re-tested with clear
PETG on my newest printer with it's "ironing" settings, which are
designed to smooth the top layer.

The test I did was for a lens, which implies some polishing and
smoothing.  What were were testing for was if the inside was "lens-y"
enough.

>> I don't think it's a material issue, unless you can find a plastic with
>> the same reflective constants as air ;-)
>
> But, are other materials *less* transparent than the one you chose
> for this example?

I don't know.

>> It's so easy to regenerate a gcode file in the slicer these days, that
>> the main factor is the "no need" part.  Modern printers use fast 32-bit
>> processors and nobody has bothered making the gcode smarter.  Faster and
>> smaller, sure, but not smarter.  The parameters you want are in the
>> slicer, just slice it again.
>
> I thought you just shipped gcode to a service bureau.  If so, they
> can't realistically make any changes to improve the print, right?

Typically you'd ship the *model* to the service bureau, and they would
slice it with recipies known to work well on their printers with their
filament.  They might even need custom gcode for their farm's
automation.

It's rare to share gcode because everyone has different printer and
filament combinations, but it does happen in forums where there's
consistency.  Bambu and Printables share gcode for their specific
printers, for example, but sharing the model is much more common.

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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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