Modeling for Printing
Hi all.
I have just purchased my first 3d printer, the Prusa Mk3.
I'm curious about the modeling. I've used different modeling packages through the years and was wondering if the modeling process was different for printing.
Do you need to change the way you model when using those models for printing?
I'm thinking of some small cylinders or pins that I want to print. Will I need to model those with an added section connected to them in order to help the printing process, so they aren't sitting flat on the floor?
I also have a couple of other parts that are awkward shapes, so maybe modeling them with a small stand on them, to keep them off the floor?
Cheers.
Chris.
Engineer - Writer - Artist
Re: Modeling for Printing
Welcome to the 3D printing world.
Please import your models to the Slic3r, enable "support", click on "slice" and then on the buttom left click on preview. Then using the bars on the right hand side you can "preview" the prints. This gives you a good idea of how to place the models on the bed and whether or not you need more supports.
"Usually", the supports generated by slic3r do the trick. usually 🙂
Re: Modeling for Printing
Hi Wolfgang.
Thanks for the reply, have to admit I kind of jumped the gun a little, I haven't actually received the printer yet, just wanted to get ahead of the game, as it were.
It seems I need to check out the whole thing before asking all my questions. 😳
Cheers.
Chris.
Engineer - Writer - Artist
Re: Modeling for Printing
If you are accustomed to modeling for subtractive machining then you will find there's a little adjustment to designing for additive manufacturing. It's neat that you can print an object "all in one shot" where if I had to machine it, I would need to make two or more setups to finish it on all sides. I try to draw the object with the "working surfaces" either flat on the print bed or as a top surface to get the best finish because the underside of most overhangs isn't as smooth as I need sometimes. Try to keep overhangs within 45 degrees of vertical for the best finish and use supports where you need to but know that the surface won't be as nice. I've printed a few small cylinders, I usually opt to print them vertically if possible or practical and use a brim if they are small in diameter. You have to consider the strength if it will carry any load though since a print can crack easier along it's layers so you may need to print a pin laying down if you need more strength? It may not end up as round as when printed vertically though. Experiment and have fun!