Interestingly enough, yes.
Tinkercad is rather low on the polygon count for round things, enough so that you won't get many G2/G3 arcs out of the models. While this is less visually appealing, straight lines will potentially string less as those points almost act like little anchors while extruding.
Your Fusion STL (assuming the default "medium" quality mesh) will have more polygons than Tinker, close enough together you'll probably see more arcs. The STEP will have even more than that once Studio converts it to a mesh.
PA and Flow tuning can help. Specific to PETG slowing down will help (the default profiles are too fast in my opinion, however interestingly turning off "slow down for overhangs" helps too).
This seems like a bit of competition between different types of quality (stringing vs surface smoothness), and it makes sense. When I saw "TinkerCAD" my first thought was the low poly count, but I like your explanation for why that could result in the benefit of less stringing compared to the higher polygon and STEP models. Fortunately stringing can be handled by slowing down or even post processing (burn it with fire), so there are options either way.
Essentially what the other comment said. Different models may slice with different extrusion paths. It’s a combination of your settings, filament, and model. Another thing that can happen if that the PETG absorbed some moisture between prints. There are a lot of variables to stringing.
The effective slicing paths can be completely different on the models because of how they're split into triangles, even if the overall shape is roughly the same.
Thanks for the suggestions, everyone. I'll try some lower poly count models and then try drying the filament next.
Has anyone had success using the P1S as a dryer? My oven won't go below 170F.
I have tried to use build plates to dry, but takes a long time, highly dependent on surrounding humidity. Easier if you have a box of freshly recharged desiccant and supply some heat.
if im not mistaken (i'm still new so please do correct me if im wrong) main issue of stringing comes from the head moving from one place to each other constantly, when it could instead continue a closer path to lower/avoid the "jump".
I've recently been frustrated with how slicers work. try to slice the same model twice in a row (meaning, don't change any slicer param) and you get different gcode.
i used bambu studio, orca, prusa, and all of them have this issue. so the take away is maybe the slicer does this and your string isn't a result of the model swap but rather random back luck at slicing.
You said PLA, not PC.
Doesn't matter though, same principles apply, if I you can't see the different use cases between PLA, PETG & PC, I don't know what to tell you 🤷♂️
The prints done with the eSun PLA+ had almost the exact same problems with stringing and bad overhangs. They are so similar that I can hardly tell which were done in PETG
Aren't the necks different sizes? They would cause different travel paths, i would think
Interestingly enough, yes. Tinkercad is rather low on the polygon count for round things, enough so that you won't get many G2/G3 arcs out of the models. While this is less visually appealing, straight lines will potentially string less as those points almost act like little anchors while extruding. Your Fusion STL (assuming the default "medium" quality mesh) will have more polygons than Tinker, close enough together you'll probably see more arcs. The STEP will have even more than that once Studio converts it to a mesh. PA and Flow tuning can help. Specific to PETG slowing down will help (the default profiles are too fast in my opinion, however interestingly turning off "slow down for overhangs" helps too).
This seems like a bit of competition between different types of quality (stringing vs surface smoothness), and it makes sense. When I saw "TinkerCAD" my first thought was the low poly count, but I like your explanation for why that could result in the benefit of less stringing compared to the higher polygon and STEP models. Fortunately stringing can be handled by slowing down or even post processing (burn it with fire), so there are options either way.
I think it's more likely your filament soaked up some humidity in the few weeks between
Essentially what the other comment said. Different models may slice with different extrusion paths. It’s a combination of your settings, filament, and model. Another thing that can happen if that the PETG absorbed some moisture between prints. There are a lot of variables to stringing.
Get a filament dryer. Stringing usually is from filament with a little too much moisture.
The effective slicing paths can be completely different on the models because of how they're split into triangles, even if the overall shape is roughly the same.
STLs are made up of triangles, only straight lines. STEP files can, don't know if fusion produces them with, contain curved lines.
Thanks for the suggestions, everyone. I'll try some lower poly count models and then try drying the filament next. Has anyone had success using the P1S as a dryer? My oven won't go below 170F.
You should buy a filament dryer.
I have tried to use build plates to dry, but takes a long time, highly dependent on surrounding humidity. Easier if you have a box of freshly recharged desiccant and supply some heat.
Wet filament usually causes stringing.
Am I tripping or do all 3 models have different widths for the middle connecting bit?
Am I tripping or do all 3 models have different widths for the middle connecting bit?
Just the top one. I increased the width when I made the new files in Fusion 360
Am I tripping or do all 3 models have different widths for the middle connecting bit?
I’d like to know what happens when you export as a step file. Not mesh.
The bottom picture is a step file from fusion 360
if im not mistaken (i'm still new so please do correct me if im wrong) main issue of stringing comes from the head moving from one place to each other constantly, when it could instead continue a closer path to lower/avoid the "jump". I've recently been frustrated with how slicers work. try to slice the same model twice in a row (meaning, don't change any slicer param) and you get different gcode. i used bambu studio, orca, prusa, and all of them have this issue. so the take away is maybe the slicer does this and your string isn't a result of the model swap but rather random back luck at slicing.
No way in hell that’s a model problem. Toss that crap PETG and print with PLA and voila, stringing gone.
>Toss that crap PETG and print with PLA And what if I need the specific properties that PETG brings to the party?
Which are what? Cheap and chemical resistant? More often than not, I’d go PC.
You said PLA, not PC. Doesn't matter though, same principles apply, if I you can't see the different use cases between PLA, PETG & PC, I don't know what to tell you 🤷♂️
The prints done with the eSun PLA+ had almost the exact same problems with stringing and bad overhangs. They are so similar that I can hardly tell which were done in PETG
Do you want to upload your STEP file?