Testing PLA with PETG support interface

No Z distance between the support material and the 3D print. Combining PLA with PETG filament for support interface.

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#mihaidesigns #shorts

[Pixelplanet]

yea you need a lot of purging when doing this because the same properties that make the support removal super easy will also make your parts super weak if you dont purge a ton between the filament swaps.
thats why only a multi extruder printer can do this kind of thing economically.

[mateuszabramek]

Bevel 90° inner angles to improve durability, so your part won't break.

[michaelschaub]

I tested this years ago.

The issue is, that you need about 2g of purge volume per purge (and therefore layer) to fully purge your nozzle. Otherwise the PETG Impurities will kill your layer adhesion in the PLA part (and the other way around). For that reason single nozzle systems are more a multi colour and less a multi material systems.

[shenqiangshou]

Yeah this works pretty well. Really makes me wish we had a fast motion system AND multple extruders so we don't have to do this filament purge + swap + prime cycle which makes the whole thing so slow that I end up not using it and just use normal supports.

[jcfpv]

That's really awesome I was under the impression that pla and petg would stick quite well to each other.

[Matqux]

I love the quiet pigeon in the background at the time of the first support removal.

[hardwareful]

Debugging idea: clear PLA and UV fluorescent PETG. If there's any residual contamination, it'll show up (unless the PLA itself fluoresces too strongly)

[ElizabethGreene]

You can go down to just one interface layer. It makes it a little easier to remove and you have less filament changes.

[MrBlakBunny]

i discovered this the hard way a few years ago, I ran out of PLA mid-print so switched to PETG, thinking it would be fine, sure enough the part held for a good week before it de-laminated

[nykwsk]

According to bambu support isn’t possible to do that. I had 10s of clogs trying to do that and apparently they said AMS isn’t made to mix pla and petg in a single print….

[jayzazu]

Having non-compatible materials in a piece, using one as a temporary support is a great idea. Its done in some welding where they use aluminum to support steel without them mixing. Its a different instance, but the logic is still the same. Super fascinating

[Doogleraia]

Maybe test on a circular object with a star cut out of the middle. That way you get supports outside so you can see how it handles curves, and you get multiple overhang and bridging tests inside the star.

[bluerider]

Many industrial printers use HIPS material for rafts and supports because it doesn't stick well to other materials. Works very similar to what you did.

[flyingskull]

Use modified PLA and PETG profile for the same temp, purge 600 from filemnt of the model to support and flush extra on simple cube at 40% infil. Always works

[IlanPerez]

I do this all the time. Works amazingly

[jestersgold]

I was looking at order me an AMS but there's a backorder. It appears to me that you are part of the problem 😂🤣🤣😂 I'm loving your multicolor prints❤

[Sv_gamez]

it's very cool how much interraction you and marsgizmo have

[joeylopezdesign]

I'm not sure if you're having the same issue, but what helped me with similar issues of the breaking, was enabling "Interface Shells" - it lays down 100% infill on the layer between changes to the geometry, this strengthened the bond for me and held downward-facing text I supported with PETG, stay together (I was having details break off like the center of the A)

[technodrone]

i tried it and had pretty good results

[billdberger]

I got some filaments mixed up in bambu slicer and ended up printing PLA lettering onto PETG, the lettering adhered during the print but I was able to remove them from the PETG with my fingernail. They came off perfectly with no damage to the lettering, I've used it a few times to make very small letters I think the smallest was 4pt font that I've glued onto other projects. I did try to print them directly onto the bed but it wouldn't work for various reasons. Maybe someone else can get some use out of this technique.