On 03.03.26 00:26, Jordan Brown via Discuss wrote:

--single-instance

I wish there would be a --clear-build-plate too, I never got around
asking for it. Or maybe I have not found it yet. Currently I just
clear the build plate myself before exporting again.

ciao,
Torsten.

On 3/2/2026 3:29 PM, Torsten Paul via Discuss wrote:

Thanks!  A definite improvement, I think.  (I had looked at Prusa's very
short web page on their CLI, and at the Slic3r page they pointed at, but
for some reason hadn't tried --help.)

Based on the behavior of delete-all and New Project, I wouldn't be
optimistic about getting the desired results.

For the project I was just working on, I needed three things preserved:

• Extrusion multiplier
• Pause at a particular layer
• Multiple instances

I think that delete-all and New Project both wipe out at least the
latter two, if not all of them.

But --single-instance will at least preserve the first two, if I
individually delete the old model rather than wiping the build plate.

What I really want is for it to understand that I'm replacing that
model, and drop the new one into the same slot, preserving placement,
duplication, scaling, rotation, et cetera.  Preserving painted-on
supports would probably be difficult because the model could have
changed arbitrarily, but it would be nice too.

What I really really want, I think, is a unified experience where I can
set all of the slicer params from OpenSCAD as part of the model.  (But
maybe I wouldn't want that as much if I had two printers, or routinely
printed the same model in multiple materials.)

Ah, maybe I can work on that after I retire.

Where can I learn more about this F8 feature, please?

On 3/2/2026 6:26 PM, Jordan Brown via Discuss wrote:

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On 3/2/2026 6:19 PM, Jon Bondy wrote:

I don't see anything in the documentation per se.  (Which is no
surprise; little of the UI is documented.)

It's Design / 3D Print.  You configure what it does with Edit /
Preferences / 3D Print.

That lets you configure a connection to OctoPrint (a local 3D print
server) or a couple of commercial services, or a local application. 
Using a local application requires that you know how to invoke the local
application to get the results you want (hence my original question). 
Here's my configuration:

When you punch F8 it pops a dialog that confirms what you want to do and
allows you to select other options:

Unchecking that "Always show dialog" checkbox bypasses this dialog in
the future; you can restore it at Edit/Preferences/Dialogs.

Note:  checking the "Enable remote services" box in the confirmation
dialog appears to have immediate effect; checking it in the Preferences
dialog seems to require restarting the application to get them to appear
in the menu.

On 3/2/26 18:29, Torsten Paul via Discuss wrote:

That is IF you can find that option in your fav slicer. The latest
2.3.2-dev version of OrcaSlicer doesn't have it.  Or,  if its still in
there, I haven't found it either, so I have to quit and cold restart the
slicer to clear the build plate.  On this busted bookworm install,
that's two minutes wasted, minimum.

Cheers, Gene Heskett, CET.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

• Louis D. Brandeis
  Don't poison our oceans, interdict drugs at the src.

it's clunkier than F8, but you can right click and reload a model in the
slicer and preserve settings, placement rotations/place on face, etc.

if it's a small enough change painted supports and seams are preserved as
well, but even if they aren't the model has them listed so you can't really
tell if they were wiped without checking.

maybe we should add a dbus interface to prusaslicer to expose plates and
models and let us trigger the reloads programmatically :)

On Mon, Mar 2, 2026, 18:13 Jordan Brown via Discuss <
discuss@lists.openscad.org> wrote:

On Tue, 2026-03-03 at 01:00 -0500, gene heskett via Discuss wrote:

Doesn't Orca have it? Prusa, Orca, and Bambu Studio have a lot in
common, and I know Bambu Studio will allow importing a 3MF which will
clear the current one and replace it with the imported one.

When you import, it asks if you want to import geometry only or the
whole project.

On 3/3/26 11:48, larry via Discuss wrote:

I get doubled loads from a locally built 2.3.2-dev version. one
slightly offset from the other.

When fine tuning a fit by .1mm, no way can the diffs be
seen. This I believe is as much from linux's
caching as opposed to an intentional thing. What it is on
my busted bookworm install, is a time wasting Pain between
my no longer padded hip joints. The stop time is 2 secs, the restart
is around 2 minutes. Every library it has to open is another 30
second system freeze until it finally paints the screen. Then
everything runs normally.

Thanks Larry.

Cheers, Gene Heskett, CET.

"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.

• Louis D. Brandeis
  Don't poison our oceans, interdict drugs at the src.