ask the nozzle

Install ATN Slicer

A free Windows download — the full OrcaSlicer with Ask The Nozzle's pre-flight, FEA and AI baked in. Takes about two minutes.

Download for Windows →
Windows 10 or 11, 64-bit · ~160 MB · macOS and Linux builds aren't available yet.

  1. Get the installer

    Your download starts automatically when you arrive here from the Download button — look for ATN_Slicer_Windows_Installer_V…_x64.exe in your Downloads folder. If it didn't start, use the Download for Windows button above. Some browsers warn on any .exe — choose Keep.

  2. Open it and get past the blue "Windows protected your PC" screen

    Double-click the downloaded file. Because the installer isn't code-signed yet, Windows SmartScreen shows a blue box saying "Windows protected your PC". This is expected — it just means we're a new publisher, not that anything's wrong.

    To continue: click More info (small link in the blue box), then the Run anyway button that appears.

    If your antivirus flags it, allow/whitelist it — new unsigned installers sometimes trip heuristics. (We're in the process of code-signing the build, which will remove this prompt.)

  3. Run through the installer

    Accept the licence and click through. It installs to C:\Program Files\ATN Slicer and adds a Start-menu / desktop shortcut. If you already have OrcaSlicer, ATN Slicer installs alongside it — your printer and filament profiles are shared, nothing to migrate.

  4. Launch and sign in

    Open ATN Slicer. Slice a plate as you normally would — the ATN pre-flight panel appears on the right. Sign in with your Ask The Nozzle account (or create one free) to unlock the findings for your plan.

    What your plan unlocks: the slicer is free. Starter shows the full pre-flight; Hobbyist adds one-click Apply + AI Diagnose & Ask; Workshop adds the local FEA (warp / support / bed-lift / anneal) and heat-soak thermal. See plans →

  5. First FEA run (Workshop)

    On Workshop, the structural FEA runs in a small local helper (the ATN Engine) that starts automatically the first time you run a check. If Windows Firewall asks, it only talks to your own machine (localhost) — allow it. Nothing about your model leaves your PC for the FEA.

  6. Staying up to date

    ATN Slicer checks for updates on launch and prompts you when a new version is out. Click through to download the latest installer and run it over the top — your settings are kept.

Troubleshooting

"Windows protected your PC" won't let me continue
Click the More info link inside the blue box first — the Run anyway button only appears after that. If your organisation blocks unsigned apps entirely, you may need an admin to allow it.
My antivirus quarantined the installer
Unsigned installers can trip heuristic scanners. Restore it from quarantine and add an exception, or wait for the signed build. The download is served only from askthenozzle.com.
The FEA / warp check says the engine isn't running
The ATN Engine starts on demand and needs a moment on first launch. Try the check again after a few seconds. If a firewall prompt appeared, make sure you allowed it (it's localhost-only). The engine features are Workshop-tier.
Is there a Mac or Linux version?
Not yet — Windows 10/11 (64-bit) only for now.
Where's the source code?
ATN Slicer is an OrcaSlicer fork under AGPL-3.0. The source is public at github.com/gmanrally/ATN-Slicer.
Download for Windows →