Prusa3D Forum - Recent Posts

FDM Polymers - A Technical Reference

hyiger — Tue, 19 May 2026 00:21:10 +0000

I've assembled (with two LLM's) all of my hand written notes (i.e. typed), TDS sheets and other sources with an outline into a single document (128 pages). I've been very careful proofreading all of it by hand to ensure accuracy and no slop. What this document is not: it is not a tutorial for FFF/FDM beginners, not a comprehensive print-failure troubleshooting guide, not a recommendation engine for specific projects, and not a substitute for per-spool calibration on the actual machine. It's a technical guide on filaments.

Please have a read and let me know if any corrections are needed. Besides some very minor formatting issues I think it is pretty solid at this point.

72dfd2d4-fdm-polymers-a-technical-reference.zip

RE: Strange lattice/stringing issue – does anyone know this failure pattern?

FoxRun3D — Mon, 18 May 2026 23:13:12 +0000

You can turn on show travel in the prusaslicer preview to see what's happening. One thing you can try is turn on "avoid crossing perimeters" in print settings.

RE: Issue With Print Lifting From Supports on One Side with PETG

Conrad — Mon, 18 May 2026 22:34:56 +0000

Armchair thoughts, but I'd try printing with the part resting on the curved blades, using a brim. Use organic supports painted just on the couple overhangs remaining on the one side. Everything else stays more or less vertical.

RE:

hyiger — Mon, 18 May 2026 22:24:11 +0000

Just send exactly as above in my post.

Posted by: @sdel

Thanks a lot for your reply! Can you explain better how to run the tes: for instance, should I include the commands suggested in my current printer gcode? if so, where in the gcode?

RE: Current "stance" on several proposed several US states laws in regards to 3D Printing.

Eds_3D_Odyssey — Mon, 18 May 2026 21:15:44 +0000

Posted by: @jurgen-7
Posted by: @eds_3d_odyssey
Shane do you think Prusa would be willing to write a letter about 3d printing that we could send to our local politicians?
That's an interesting request, after you stated several times that you are annoyed with foreigners commenting on US politics.

Shane asked us to play nice so I will.

You’re a smart guy you already know the difference.

RE: Current "stance" on several proposed several US states laws in regards to 3D Printing.

hyiger — Mon, 18 May 2026 21:15:08 +0000

Posted by: @netpackrat
Whoever is running Printed Solid could take the lead there, if they haven't already been involved in contacting legislators over it.

At the moment that person is Josef Prusa.

RE: Current "stance" on several proposed several US states laws in regards to 3D Printing.

Eds_3D_Odyssey — Mon, 18 May 2026 21:12:34 +0000

Posted by: @netpackrat

Posted by: @jurgen-7
Posted by: @eds_3d_odyssey
Shane do you think Prusa would be willing to write a letter about 3d printing that we could send to our local politicians?
That's an interesting request, after you stated several times that you are annoyed with foreigners commenting on US politics.
They have a US business presence and US employees. Whoever is running Printed Solid could take the lead there, if they haven't already been involved in contacting legislators over it. Also, it's too bad Prusa doesn't have somebody at HQ who happens to be an American, who is knowledgeable, articulate, and level headed, like for example a forum administrator who has the pulse of what the average user thinks of these laws. Maybe such a person could bridge that gap. 🤣

Well said!!

How can we find this mythical person to help us out of these dark times?? We can only hope and pray to the 3d gods that this hero will somehow read this thread and save us.

RE: Update...(Kind of)

WDLandry — Mon, 18 May 2026 21:10:16 +0000

I have no doubt they are legitimate, but that’s doesn’t stop the pricing here to be a bit cynical at 30% mark up on the Prusa asking price for something they likely won’t have in stock for months

RE: Calibration Objects, Temperature and Retraction Towers

Neophyl — Mon, 18 May 2026 20:54:10 +0000

If you select Use firmware retraction then that is passed off completely to the machines firmware. The slicer does nothing except issue the retract / unretract commands (G10/G11 for Marlin firmware) . No values at all and most firmware will just use a fixed value that is programmed in. Klipper or similar may be more clever but most of the others wont be.

So if you are testing retraction then make sure you do NOT have use firmware retraction enabled. As it will make the other 2 settings useless (in fact the extruder settings are greyed out if you set that) but while you can still set the filament over ride it doesnt appear to change the gcode at all.