Printytron is a chat. After the first model appears, keep talking.
Things that work well:
- “Make it 30mm wide instead of 25.”
- “Add a chamfer on the top edge, 2mm.”
- “The mounting holes are too close to the edge — move them 5mm in.”
- “Make the wall 1mm thicker.”
- “Remove the slot in the front.”
- “The version before this one was better. Go back to that and just make it taller.”
Iterate one change at a time when refining. “Make it wider AND add a chamfer AND move the holes” — you'll get all three changes but lose track of which one went wrong if something does. One change per prompt makes diagnosis easy.
The AI keeps full context across the session, so back-references work. “The part you just made,” “the version before,” “that hole” — all fine.
The truth
Iteration is free. Use it.
FactsEach refinement counts as one prompt toward the session's allowance. The cap is per build session — when you start a new model, your count resets. Signed-in accounts get a much higher allowance. (See the accounts and quotas article.)
If the AI ever asks you a question — usually a font picker, occasionally a one-question check on a missing detail — answer it. It's only asking when answering will make the result much better than guessing.
Downloading your model
When the model is right, hit Download.
A dialog appears with two fields:
- Name (pre-filled — the AI suggests one based on the conversation).
- Description (also pre-filled, also editable, also required).
You can edit either. There's a checkbox to include the model in the public gallery — on by default. Untick it if you want the download but not the listing.
Hit Download. The file hits your machine. The model becomes a gallery listing at its own shareable URL.
STL is free for everyone. Sign in (free) and you can also grab OBJ or 3MF — those keep every piece as its own named, coloured part, and 3MF carries real millimetres so the slicer never guesses the scale.
Important
One model, one link — always the latest.
Keep refining the same session and download again, and by default the listing updates: same URL, now showing the new version. Anyone you've sent the link to sees the latest. If you want to keep both versions, the dialog also offers Save as a new copy — that forks your work into a separate model with its own listing, its own URL, and a fresh prompt allowance, and drops you into the copy to keep building.
Wrong turn? Just say so. The chat keeps every version. “The version before this one was better — go back to that” rewinds the model to that point, and you refine from there. No need to hoard downloads as backups.
The STL is universal. Drop it into Bambu Studio, PrusaSlicer, Cura, OrcaSlicer — any slicer.