I’m pretty new to 3D-printing, so i had some good and some bad prints, the failed ones mostly in PETG (Babu’s own PETG).
After searching on this forum i changed some settings which improved the quality of my PETG prints significantly, the stringing etc. are gone but i’m still struggling with support settings.
The model here failed two times (prints almost 6 hours)
Here are my settings i use now:
The problem now that the interface layer, which is grey PLA, has such a strong adhesion to the model that it is impossible to remove, every time the model itself breaks because of it.
The support layers which are on the opposite side of this thin interface layer come off really good, but not so on the model side.
Any advice would be nice, also how you guys would orientate this model on the plate.
Thanks very much!
I can’t help with the support interface using different filaments but I would likely split the model in the middle (green), add connectors and print both pieces with the ends on the plate (blue). The split and connectors can be done in the slicer. I believe the strength would be retained as it looks like it’s a hanger? The forces are on both hooks, not the central spar and this would also be stronger as the layer lines are at 90°
How do you do the connectors in the slicer? Is there a trick I’m missing?
I assume you add&remove a cone or cube on each side? How do you position them so they line up.
Bambu Studio macht das selbst. Bevor das Objekt geschnitten wird wählen Sie einen (oder mehrere, so viel Sie benötigen; ich würde hier 2 verwenden) Konnektor aus und platzieren ihn am Objekt. In der Schneideansicht können Sie das hervorragend sehen. Wenn Sie dann das Objekt schneiden, haben Sie zwei Teile die ineinander passen.
Bambu Studio does this itself. Before cutting the object, you select one (or more, as many as you need; I would use 2 here) connector and place it on the object. In the cutting view, you can see this excellently. Then when you cut the object, you have two pieces that fit into each other.
Thanks, I hadn’t seen the connectors stuff. Round dowels don’t usually work for me, but the cubes might. Depends on whether I can dial in some tolerance, 'cause if not they ain’t gonna work for PETG or ASA…
Yes printing it that way would solve the problem but then i have 1 pieces which i need to glue together and i was wondering how you guys would tackle this problem if it needs to be in one piece.
I thought that the interface layer would make the support structure easy to remove but this layer is almost impossible to remove (even with a chisel), and you can not get into the narrow slot with a chisel.
You don’t need support inside that channel, you only need support under the portion that hangs down (and thus starts in mid-air). Use the support painting to keep it to that.
For removal, you need to play with the top Z distance. Make it 1.5x or 2x what you have and the support will remove more easily, but the surface finish may be worse. The bambu scraper is pretty good for removing bits of support from a surface…
PETG mit PLA als Unterstützung zu drucken, bringt noch ein anderes Problem mit sich. Durch den Filamentwechsel halten die Schichten im Bereich der Unterstützungsschnittstelle oftmals schlechter (vermutlich, weil das Material zu stark abkühlt und die nächste Schicht PETG dann darauf keine so feste Verbindung mehr eingeht). Das Modell bricht dann leicht an dieser Stelle. Beim Material hatte ich mit PLA als Unterstützung für PETG allerdings keine Probleme. Wenn ich nahtlose Unterstützung verwende, lässt es sich schwer entfernen, aber es lässt sich entfernen.
Printing PETG with PLA as support brings another problem with it. Due to the change of filament, the layers in the area of the support interface often hold less well (probably because the material cools down too much and the next layer of PETG then no longer forms such a strong bond to it). The model then breaks easily at this point. However, I have not had any problems with the material using PLA as a support for PETG. When I use seamless support, it is difficult to remove, but it can be removed.
Hi, thanks for your help, but i don’t understand why the channel doesn’t need support, unless i orient it like RMB suggests, there’s always a side in mid-air, no?
Wenn Du mittig schneiden würdest, @RMB hat die gestrichelte grüne Linie eingezeichnet. Dann kannst Du beide Hälften so drehen, dass sie keine Unterstützung benötigen.
Am Anfang muss man viel probieren, irgendwann geht wird das Routine und man entwirft automatisch Modelle, die sich besser drucken lassen, auch ohne Stützen.
What I was trying to say is that you need supports under the portion that hangs down but you do not need support inside that channel because the top ends up being a very short bridge which can be printed without support.
