I rarely comment and very rarely watch 1 hour+ videos but this was surprisingly information dense and super helpful. Really appreciate it (and all of the work you put into this channel)!
Thank you so much, this was very informative. I have actually considered contacting you directly for advice and help regarding an ongoing project I am working on. This helps me further on my path to realize my first project. Thank you for the great content:)
I had no idea something like this existed. I will certainly check Xometry out when i finalize my design. Transparency in pricing instant quote. Aluminum milling
Great video! A couple of questions however: 1:02:40 Why can't slicers/CAM software compensate for the known inaccuracies in the manufacturing methods? It seems suboptimal to compensate in CAD, because then I have to change it if I move to a different method or even different brand of machine. A second question is why slicers can't use step files, couldn't an FDM machine make use of true arcs? At least when the arc is in the horizontal plane. And I have seen some fancy experiments with "true" 3D printing (i.e. with curved layers in the z direction)
Howdy! That's definitely a good question and one I have asked about for years. The good news is that investment in software is happening and there are certain platforms that are getting better at 1) predicting the outcome before building (e.g. "digital twin), 2) potentially pre-deforming the geometry input so the outcome is closer to the CAD, and 3) use in-process monitoring to provide feedback and potentially compensate for deviation during the build. Why is this so hard for 3DP? Because you are starting with a smaller material and then fusing or bonding it in a way to build the part. With machining, you have a material that remains stable--for the most part--as you precisely cut away from it. With 3D printing, you denature the base material and it is formed layer by layer. There are a lot of considerations from the complex mix of geometry, orientation, process, parameters, and the environment for the print and how it changes during the printing process. Geometry plays a huge role in expectations of a print, where heat from a thick feature could affect the wall thickness of a thin feature. Or, for particularly thin features or knife-edges, the feature just may not even be able to be made as designed due to the deposition process of printing. I hope that in a couple years my explanations change from NET SHAPE to metaphors more similar to machining when talking tolerances and expectations --- it's 90% a software issue.
Regarding slicers and STP files. Again, it's software-driven. Mesh files like STL have been the base of 3D printing since their invention in 1984. It has been carried along and it is about time for a change. File types like 3MF are exciting because they can hold curvature as well as A LOT more information about the part for 3D production. I would love to build parts directly from parametric CAD. Check out nTopology to see what they are able to do with this because you can modify the model and export slicing data directly from your solid model, yielding better data for the printer.
Thank you for the opportunity to geek out on 3D printing, CAD, and Xometry, Joko!!
Greg it was a real honor! You're welcome back anytime!
Thanks for this interview. Glad to hear of a service like Xometry.
So that's what the affable bloke who's helped me so much with FreeCAD looks like. (And thanks for bringing Xometry to my attention too).
My thoughts exactly. Although in the beginning I was sure Joko was the guy on the left. Because he looks more geeky I guess ;)
Xometry provides horrible service and materials. Most of the aluminum i get from them is far out of spec its not even usable.
@@ottoglenewinkel7702 Have you found an alternative supplier or do you persist in the hope that matters improve?
I rarely comment and very rarely watch 1 hour+ videos but this was surprisingly information dense and super helpful. Really appreciate it (and all of the work you put into this channel)!
I've just got to the end and I'll be sharing links to this video. Well done, I learnt some useful things there.
Thanks for answering my question! really helpful :)
Appreciate what you are doing for the FreeCAD community.
Thank you so much, this was very informative. I have actually considered contacting you directly for advice and help regarding an ongoing project I am working on. This helps me further on my path to realize my first project. Thank you for the great content:)
Great content!
I had no idea something like this existed. I will certainly check Xometry out when i finalize my design. Transparency in pricing instant quote. Aluminum milling
That was a long one but what fantastic content. Lots of useful information.
Awesome!
Enjoyed the video thanks. Joko, you look like my nephew! 👍😂
Great video! A couple of questions however:
1:02:40 Why can't slicers/CAM software compensate for the known inaccuracies in the manufacturing methods? It seems suboptimal to compensate in CAD, because then I have to change it if I move to a different method or even different brand of machine.
A second question is why slicers can't use step files, couldn't an FDM machine make use of true arcs? At least when the arc is in the horizontal plane. And I have seen some fancy experiments with "true" 3D printing (i.e. with curved layers in the z direction)
Howdy! That's definitely a good question and one I have asked about for years. The good news is that investment in software is happening and there are certain platforms that are getting better at 1) predicting the outcome before building (e.g. "digital twin), 2) potentially pre-deforming the geometry input so the outcome is closer to the CAD, and 3) use in-process monitoring to provide feedback and potentially compensate for deviation during the build.
Why is this so hard for 3DP? Because you are starting with a smaller material and then fusing or bonding it in a way to build the part. With machining, you have a material that remains stable--for the most part--as you precisely cut away from it. With 3D printing, you denature the base material and it is formed layer by layer. There are a lot of considerations from the complex mix of geometry, orientation, process, parameters, and the environment for the print and how it changes during the printing process. Geometry plays a huge role in expectations of a print, where heat from a thick feature could affect the wall thickness of a thin feature. Or, for particularly thin features or knife-edges, the feature just may not even be able to be made as designed due to the deposition process of printing.
I hope that in a couple years my explanations change from NET SHAPE to metaphors more similar to machining when talking tolerances and expectations --- it's 90% a software issue.
Regarding slicers and STP files. Again, it's software-driven. Mesh files like STL have been the base of 3D printing since their invention in 1984. It has been carried along and it is about time for a change. File types like 3MF are exciting because they can hold curvature as well as A LOT more information about the part for 3D production. I would love to build parts directly from parametric CAD. Check out nTopology to see what they are able to do with this because you can modify the model and export slicing data directly from your solid model, yielding better data for the printer.
BTW, very interested in the 3D scan smoothing.
You're a pro at hosting podcasts! You'll take my job. jk :)
I love your work Rafael! Keep up your podcast!
might be an interesting vid if you like or need plastic parts...but I don't have any use for plastic parts.....
Xometry provides horrible service and materials. Most of the aluminum i get from them is far out of spec its not even usable.