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Need help with this wrap feature.
asterios_anagnostou
Member Posts: 29 ✭✭
Hey all,
Had a problem with this wrap. I understand why it's doing what it's doing, but I'm not sure how to change it.
So the problem I'm having is that the fins that stick out get wider as they extend outward, which I get because its wrapped around a curved surface.
How can I get them to not do that? To just stay linear?
Another thing is, I'm inot sure how to make that wrap an add versus a new.
If I add it, I can't seem to make the circular pattern because I can't select the wrap by itself, but since I made it new, it's not part of the main body. How would y'all go about fixing that?
Thanks so much so much for any help!
https://cad.onshape.com/documents/2ef8eb2de34b858b964d79ad/w/c9a8370d6e04f0dc1f5a5acf/e/e368c5c259ea8fc35ffa94bf?renderMode=0&uiState=67ce155d50c8244d94572ade
Comments
An Extrude will work fine. Not sure why you thought it needed a wrap?
Ah ok. I thought I needed to wrap the sketch to the contour of the cylinder for it to properly "sit" on it . I guess I overcomplicating that one huh? Lol.
I will try doing with without the wrap.
It printed badly too and I wonder if it may have something to do with the way I did it. The slicer generated supports that I am absolutely unable to to get off without tearing the whole darned fin off. What kind of support pattern and what infill would you use for the fins?
Thanks so much!
I added some filets That may help strength of part intersects and added them to circular patterns instead of in sketch. More efficient.
Haven't done much of the printing myself but the scuttle but is that tilting the part to 45 deg will eliminate a bunch of supports.
Maybe someone with more experience can chip in on printing? 😁
https://cad.onshape.com/documents/46a5c33fdf1c63367af78d2f/w/560e42f386b52acc339b60e8/e/8e7b7515af699d85b195e2ed
I've been using tree supports and controlling the interface at the top of the tree. Depending on what's being printed and quality desired on the underside and nozzle size…you can up the angle that supports are created to eliminated some of it. 45 is general rule of thumb to be safe. but I"ve had some luck all the way to 60-70 without support.
Thank you guys, I really appreciate the input!
Geez these overhangs are really kicking my butt. So this is what happens when I print the part. On this try, it didn't seem to really print the fins. It printed A TON of support, but when you really look at it, the fins don't seem to exist; or at least they're hard to discern in the mess. Also, you can see that the fins only barely touch the main body, which is weird. The rest of the body prints beautifully though.
I'm printing with PETG, 270C/85C. Infill 100% because it's going onto an aircraft. Retraction 2mm. Retraction Speed 30mm/s. Not sure what else to give you in terms of settings…
What do you guys think?
Probably gonna get better help from 3D printing forums…. but your fins are only 0.8mm thick at the widest part. It looks as though your layer thickness is pretty thick. for such fine detail. 270° seems high for PETG but maybe that spec on the filament your using. I just printed something in PETG last night at 234°. You can try to switch to tree supports with a single wall & change layer height to 0.16 or 0.12. I'm assuming your using a 0.4 nozzle... a smaller nozzle will increase detail at the expense of printing time.
You will have to learn what settings do what so you can get the result you desire. 3D printing definitely isn't as plug and play as some might think.
Thanks for the tips. Yeah it's been a huge learning curve. I got into CAD and 3d printing so I could save on model aircraft parts and so that I can continue making the parts after the planes were discontinued and it's been difficult, but definitely worth the time!
What slicer are you using and how did you generate those supports? Those are exactly what I want! Were they auto generated? One thing that sucks about Cura, and this could be something I'm not doing right, is that you can tell it to generate supports, but it doesn't show it on the plate. It would be nice to see what it's planning on generating, if you know what I mean.
I was thinking about changing nozzle sizes, but was worried about adding another layer of change before dialing in what I have now. But maybe that's what I need to do. I printed the latest rendition at .016 with the stock 4mm nozzle.
270C is higher than usual for sure. I aimed a little high to get the best adhesion, but maybe it's at the cost of it printing properly. I can try a little lower, 260 or 250.
Cura definately will show you supports. you just have to find where to turn it on. I primarily used Cura up to this point. but think I'm gonna switch to bambu studio. seems more robust. That's what that pic is from. Cura will do tree supports. you have to turn on the advanced settings and get your hands dirty.
Copy, yeah I've used trees on Cura before, just had that issue where it didn't preview what it was going to generate. I will look for that feature as well, but it seems strange that it wouldn't default to that. I have to get Cura setup for Klipper as well, because I made the jump with the Sonic Pad last night. I MAY ultimately just be better off going with a Slicer that supports it.
Bamboo Studio, huh? Gonna check that out. I touched a little bit on OrcaSlicer, but had a little trouble getting used to it. Have you played around with that one?
I'm so used to Cura, but I'll have to explore other avenues, me thinks.
No haven't messed with too many slicers. Still pretty new to them sorta. Cura just feels so clunky. probably due to being used to using CAD tools.
Prusa Slicer works pretty well in my experience and there is a ton of on-line support for it.
@asterios_anagnostou On the preview screen…Here is the Cura setting for seeing the supports. Calling them helpers makes perfect sense when your looking for supports. 🤦♂️
Thank you guys. I will try this again. I printed it last night using Orca and it printed much better than every other time. Still had some issues with the fins being a little brittle. It almost looks as though the layers aren't adhering to each other which makes me think overhang cooling is a bit high, but I'm not sure.
They are very thin and that's problematic. I revisited the model and made the fins a bit thicker. I'll go back and mess with the cooling a bit too.