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What is the best way to create trusses on multiple angled planes
pratik_singh448
Member Posts: 6 ✭
I am creating a light-weight rubber band-powered car; to ensure it's light when I print, I wanted to make cutouts. When I did this, however, it resulted in this:
It just was messy, and if anyone has any suggestions to create cutouts in my design, please let me know. I have reverted what I did back to my design without any cutouts:
(Also just a side note if anyone can lmk how to make my design less poopy/jig jaggied, what my teacher said, )
Link to Doc: https://cad.onshape.com/documents/8ee7ca6e447ee21c04cd1b4f/w/731f6160ffb5df23ef6eb575/e/dac8381d3cf9823e8ec54a32?renderMode=1&uiState=67ec09159f171f1386d9a7df
Comments
Just sketch where you want the cutouts and extrude through it. Not sure what trying to do with a roof truss overlay. Is that some sort of theme your trying to accomplish?
The truss is something I am trying to accomplish. Second, when I extrude it, I don't want to go all the way to ruin aerodynamics, but since the shape isn't flat, sometimes to sketch goes through, and if I try to limit how far it goes sometimes the whole image doesn't come out and inside just part of one triangle. I was just wondering if there is an easy way to make cutouts that create the complete triangle but don't cut through the entire body.
See it sorta turns into this when I try to make sure the cutouts are not fullying cutting:
You can use the option in your extrude for depth to go "up to face" and then set and offset for how thick you want to leave material.
BTW if you print with FDM, print a hollow part with a slight infill, will always be stiffer than these trusses that are open on one side. the 'roof' and 'bottom' are more important than the layers in between. you're now creating ribs, which is great, but the roof is open and therefore compromised…
for anything other than FDM, your approach is the right way to go for stiffness sake.
Regarding poopy jig jag… The less amount of segments and points the smoother it gets. not sure why all these points are in sketch2 circled in red. but that's most likely not neccessary and can probably be eliminated. As well it seems you don't quite need as many points for the other splines as well. less is smother and simpler geometry.