Design and Print Do Not Match
I need some serious help please. I use to have a copy of Fusion 360 as it was much easier to use versus Blender. In the past few months...Fusion decided they no longer support my iMac's OS. I have FreeCad as well as the new Plasticity that I've been using but there seems to be issues when exporting and trying to print. I am being told it's with my Slicer software (PrusaSlicer) but I'm not sure. It's a simple chain necklace emblem with 2 circles and then some writing on the top. It's NOT a difficult design but for some reason when I go to print, it's NOT turning out like what it looks like on the screen. The edges of the circles are very rough and not turning out good at all. I've wasted filament trying to figure this out. The bottom circle with the attached loop for a chain are Black and all the lettering and date are Gold. Can someone more experienced please take a look at this file and let me know what's going on? Thank you.
RE: Design and Print Do Not Match
Nothing attached. You have to zip up files for them to attach here. If you could zip up both your prusa slicer 3mf project file (file>save project as) as well as your Blender file and post it here someone will take a look when they can. I certainly will as I use Blender for most of my designs and use a combination of PS and Orca to slice.
Also if you wouldn't mind posting a screen cap of the sliced result you are getting that is 'wrong' that would help too.
RE: Design and Print Do Not Match
Here is the zip file with my PruseSlicer 3MF, the Blender file as well as a picture of what it turned out like. In the photo, you'll see the ridges along the circles and letters as well as a fatter outer line along the top of the black base. Not sure why that didn't print the same size. You'll also see the bottom layers of black that do not look smooth.
RE: Design and Print Do Not Match
A few things. First the small loop you have at the top is not level with the bottom of the main disc. That means the entire main disc is not on the bed in the slicer and with be ruining the bed adhesion for that part as its all printed as bridging. Basically only the bottom of the small ring is on the bed. Please do examine the slice preview every time and make sure to look from the bottom too under the bed. On yours the light blue of bridging is plainly visible.
That might be causing warping due to having almost no bed adhesion which will effect your top surfaces. Cant tell from the included picture.
You need to either sink the part or trim the small ring. Alternatively alter the existing model in blender so they are on the same plane which is very easy to do.
Secondly the cylinders you are using in blender aren't pretty low res, that's going to cause faceting on the slice rather than being a smooth edged disc.
Bulges at top layers are quite common. There are MANY MANY threads on the forum about it. Search 'Buldges', and yeah the OP cant spell 🙂 You could try changing slicing to external perimeters first in this case which can help in some cases.
Also the way PS slices top surfaces with raised portions such as your letters is not idea for aesthetics and is more geared for strength. As the infill passes through so the disc top surface isn't a smooth continuous layer. You have to use certain tricks to change how it slices. Theres several ways to achieve that. I've attached a zip with an updated project file that shows one way. Please do examine the changes to the part and the settings. If you have questions as to how and why then please ask.
If you don't mind me saying, your geometry is also pretty bad, if you run blenders included 3dprint tool you will see you have 2218 intersecting faces. While they will slice ok, its pretty poor technique. Look up Non Destructive modelling in Blender and don't join parts in the blend file. Let the export take care of that. That way you can easily modify things later.
I have also included an updated blend file in the zip with the much smoother cylinders in a remodelled version. It uses non destructive modelling for the hole and the inner section and the letters and raised rim now also do not intersect with the main body. The small ring is also lined up correctly to give a bottom all at the same level.
Give that a try.
RE: Design and Print Do Not Match
Thank you for taking the time to provide issues. I will take a look at the file you provided. Like I stated in the first post, I am no longer able to use Fusion 360 as my OS is no longer supported and I can't justify purchasing a new iMac just because the OS won't support an app. The iMac runs very well. I am limited on what apps I am able to use to create things. I guess for now I'm stuck with either FreeCad or Blender. I've used Blender in the past on small projects like this but it's not cut and dry like Fusion was. I wanted to try out Shapr3D but again...my OS is not supported. Is there another piece of software you'd recommend to someone who's NOT a professional but more of a hobbies who does small simple projects?