The cost of modelling time
my brother in cad, it’s a cylinder. a tube.
Comment on Partner broke the vacuum tube, so designed and printed replacements.
snota@sh.itjust.works 4 months ago
I honestly think this is the worst use case for a 3d printer. The part isn’t improved by printing. You can buy the part easily. The cost of modelling time and printing is more than the replacement. There’s a decent chance the replacement part would have arrived quicker than the print took… Sorry to be a bore, it’s better than an octopus or another benchy, I’ll give you that.
mojofrododojo@lemmy.world 4 months ago
scarilog@lemmy.world 4 months ago
Well you’ve clearly never 3d modelled anything. Especially for a part that has to fit to existing parts, it takes far more time than just making a cylinder.
mojofrododojo@lemmy.world 4 months ago
lololol
I started with 3dsr3 on dos bro. I design and model my own prints, ranging from input devices for vr to cosplay bits for the kiddos.
Yeah, I mean you’re gonna have to bust out the calipers… I don’t mean to suggest there are one-step shortcuts, but at the end of the day, you have an exterior diameter and interior diameter to worry about so it fits other bits, and external details that may or may not be needed (flutes to strengthen the design for example). But for all that you’ll spend way more time dialing in and printing tests to find the best orientation and support / adhesion / extrusion / infill etc…
but the modeling itself? an hour, a test print, fit test, adjustments, another test print (tests don’t need to be all of the model btw, if you’re just testing for fit to other parts!), then you should be on your way to a usable prototype. the cost of modelling should be the smallest sink in time cost.
314xel@lemmy.world 4 months ago
Excuse my ignorance, I don’t know much about 3D printer material types / filament resistance, but from a few 3D printed cases for small devices I had, isn’t the plastic brittle? Especially for a long cylinder shape. I dropped 2 cases on the floor and they broke in multiple pieces where 2 layers of filament joined. But granted, their thickness was 2-3 millimeters.
FuglyDuck@lemmy.world 4 months ago
Phone cases should probably be printed in TPU, which really shouldn’t be shattering. (Unless it’s freaking cold outside.
Maximum drop protection. Would come from a hard shell over a squashy TPU case.
There’s really not that much force on these kinds of things, of greater concern is air flow but it looks like op nailed that.
(If op had taken it down to a smaller diameter, cut outs in the nozzle or somewhere would be be necessary- otherwise the vacuum’s motor has to work too hard to get proper air… and they rely on that flow to cool down.)
Thorry84@feddit.nl 4 months ago
Yes normally the tube gets inserted into another tube, which is the stuck into another tube or a foot. This leaves a large moment force directly where the tube is pushed into the other tube. Most likely even with careful use, this tube will break very quickly.
Vacuum cleaner parts are made from a high impact plastic, something that’s tough but a bit on the softer side. This way it can take a beating without breaking into a million pieces.
3D printing this is cool and impressive to pull off such a high and narrow print. But practically speaking it makes no sense.
rambos@lemm.ee 4 months ago
It depends on material type, print settings and design itself. While injection molded parts are usually stronger, 3D printed parts can survive a lot of stress if built correctly (some printers are built from 3D printed parts for example). But you are right, OPs tubes might not survive for too long (it will break between layers most likely). I wish it survives for many years tho
On the other hand, 3D printing is not only used to build better and cheaper parts, its a hobby for lot of us. The ability to imagine, create a 3D model and build the part at home makes me feel powerfull. Its almost always better (cheaper, stronger, faster) to use other technologies or just buy something, but where is the fun 😄
infinitevalence@discuss.online 4 months ago
You are correct that injection molded plastic is generally stronger than FDM. I have a well tuned printer, and I use a .6mm nozzle which gives better layer adhesion than the standard .4mm while not having to sacrifice too much detail. I also print in a tent to keep the air warm and gain some effect from annealing the plastic which makes prints slightly stronger.
Draupnir@lemmy.world 4 months ago
I mean sure, but if someone does it as a hobby then there is the fun and accomplishment value out of it too
infinitevalence@discuss.online 4 months ago
Modelling took less than 2-3 hours, and print was overnight so unless Amazon has drone shipments to my area this was faster. Cost in Filament was around $6. All told I think I ended up on the plus side with faster “service” and lower cost.
bigkahuna1986@lemmy.ml 4 months ago
You also got CAD experience from this so the next one will be faster too.