I’m printing 6 of these models. And on the spatula he’s holding I have support blockers set on the overhangs at the top of the spatula. However, in 4/6 of the models, the entire spatula is being covered in supports and I’m not sure why.
These are all the settings I have changed. Everything else should be the default.
The issue:
Why are 2/6 of the models displaying the correct supports and why are the other 4 models displaying the spatula covered with the supports? All of the models are copies of each other which is why I thought it was strange for it to only affect some of the models and not others.
Look at the red circles, that is the spatula. In the first image, there are no supports at the overhangs near the top of the spatula because I have put support blockers there. However, the second image, the model is a copy of the first model, but the spatula is fully covered in supports for an unknown reason. My question was why are all those extra supports showing up on a copied model?
I saw the shapes, but, I’m not sure how you are expecting people who have no idea what the original shape looks like, it orientation on the plate, its proximity to other models, any and all support settings, support blockers and enforcers or if you are printing by layer or object - to have a clue if we are left to guess looking at what is essentially a single colour blob.
It looks like you have either painted support blocks or used very thin support blocker shapes inside the gaps within the spatula.
Try adding a support blocker rectangle and covers the entire portion of the spatula (or all of it) depending on which bits should and should not gain supports.
If you did paint it on, chances are it is the angle and/or proximity to the edge of the plate that is causing issues.
If you did use shapes only in the spatula gaps, this might also be affected by the angle of the model and/or proximity to the edge of the plate. Tiny support blocker shapes can have unforeseen outcomes as their geometry is greatly affected by multiple factors.
As a test, move one of the models that have incorrectly applied supports to the middle of a new plate and centre it. Does the problem persist?
The support blocker rectangle did not work. If I move the incorrect model to another plate it still stays incorrect. If I move the working model to a new plate it continues to work.
After some further tests with rotation, I think it might be due to the rotation of the object which I don’t really understand. So when I copy the working model to a new plate and then change its rotation(even just by .01mm), the supports start showing up incorrectly.
I have noticed this behavior. I am fairly certain that this is simply the variations one might see as a result of where the filament falls with respect to filament alignment for each resolution. It is likely caused by rounding errors within the placement calculation.
Here’s how you can test that theory. Take only one of your models and stick it on the same spot in the plate. Then rotate the model use 30 degree increments and re-slice. If the supports seem to shift on each orientation, this would lend support to this theory.
So if I take an object and slice it using default, I will get a completely different “mapping” of structures.
I’ve noticed that this is particularly fickle with using support blocker/enforcers and I believe that is largely due to the imprecision of individual pixels as it paints across a curved surface.
Alternatively, you can experiment without modifying the model position by changing the angle of support. Have you tried that? I’ve found that in some cases where supports weren’t going where I needed them to even after painting blockers/enforcers, changing the angle at which a support is added can also help.
