<ronoaldo>
Anyone up to help me debug a light saber on OpenSCAD? It is more likelly that I'm having issues with math/trigonometry rather than with scad :|
<InPhase>
Okay, so now what do you mean by overlapping more?
<InPhase>
As in the print just mashes together with stringing?
<InPhase>
In the model they appear to be equally spaced down the conical parts.
<ronoaldo>
InPhase: thanks for the reply! By overlapping I mean that, the way the spacing is done the top "blades" expand less because there is more surface overlapping with the lower one. I.e., it should in theory expand to like 800cm but it only reaches like 600 or less
<ronoaldo>
I'm not sure if having equal spacing is the right aproach. Also, there could be a 3d-printer issue there right? Like, I'm printing with a 0.18mm and 0.20mm layer heights during tests.
<ronoaldo>
I was trying to do a 3d sim on Blender to try to see if the model is OK but ... Blender is so confusing until you get used to it
<ronoaldo>
I'll do another print with a 140mm height to see if this changes anything (i.e., the height will change the angle somehow and that may be helpful to let it "expand" more)
<ronoaldo>
Sorry for the language - I hope I'm being clear if not kindly let me know as I'm not native english
<InPhase>
Well, did you try animating it?
<ronoaldo>
hmm... you mean in Blender? Yes - I was interested in the collision detection to kind of "preview" if the measures made sense in the "perfect world" simulation before printing
<InPhase>
No, I mean in OpenSCAD.
<ronoaldo>
I did sort of made a way to preview in openscad (a customizer flag named expand)
<InPhase>
ronoaldo: function m(n) = n<0 ? 0 : (1-2*abs($t-0.5))*n;
<InPhase>
Then View, Animate, FPS: 30, Steps: 300
<ronoaldo>
let me test
<InPhase>
And maybe increase the cube for your previewInside feature.
<InPhase>
Add 600 to height, translate -600 in z.
<ronoaldo>
OMG this is amazing :O it took me several hours on Blender to get a crappy useless animation lol
<InPhase>
You can just arbitrarily increase the step count to slow it down.
<InPhase>
Then watch that "Time" value to the left. I set it so 0.5 is max extent, 0 and 1 are closed.
<InPhase>
It's looking to me like they come together with a perfect fit at exactly the same extensions.
<InPhase>
Although those extensions might not be as far extended as you wanted.
<InPhase>
If there is a difference between the stages I think this is either a printing property, or a property related to the differing flex of the material at different diameters.
<InPhase>
However, you can try to make adjustments to the model to precompensate fo the properties you are observing after printing. You can try to do some sort of measurement of the print to see how much more each segment should extend, and then use the model view there to try to extrapolate what that means in terms of diameter changes.
<InPhase>
Then if you're really clever, parameterize that down to an adjustment factor in case someone else has a slightly different printer. :)
<ronoaldo>
Ok, that makes a lot of sense!
<ronoaldo>
And I'm indeed trying to make it so that for a different printer, the changes should be recalculated properly :)
<InPhase>
I've done a lot of that in my posted work. But what I've discovered is that the vast majority of people have very similar printer results.
<ronoaldo>
There already exists a model like the one I'm trying to make, but it has like 180mm and my printer only has 140mm of height. So I scale down to print but it either melts or is worse than what I got in terms of length or durability
<InPhase>
Most of my designs that are tight fit ones are reported as working right for my default parameters for most people. There are exceptions, but it's the minority.
<ronoaldo>
oh, got it
<InPhase>
So, do it for the ones that aren't, but also have confidence your work will translate well most likely.
<ronoaldo>
Thank you very much for the insights :)
<InPhase>
Good luck. :) My older son years ago really enjoyed playing with a commercial version of one of these.
<ronoaldo>
nice :) my daughter and two sons also loved the wacky ones we ended up making - I'm now trying to build one from scrach for our SW playing
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<amrelik>
hi, I'm not sure I can ask questions here, but I don't understand technology, at school I was told to work in OpenSCAD, and I don't have a preview window at all, does that mean I don't have enough technical characteristics?
<J1A8448>
ecraven either polyhedron or hull sequence
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<J1A8448>
so one part of the hull would be the base shape that will be reduced and centered under the dome .. the second is the dome that will move up and rotate
<InPhase>
amrelik: That wasn't a yes/no question...
<InPhase>
amrelik: When did it start?
<amrelik>
InPhase yes
<J1A8448>
amrelik ?
<amrelik>
J1A8448 neither f5 nor f6 work, no matter what I write, cube, cylinder, spheres, etc.
<J1A8448>
amrelik can you post a screenshot on imgur ?
<J1A8448>
maybe the window is out of sight .. right click the tab and say "arrange windows"
<J1A8448>
click the taskbar not the tab
<amrelik>
J1A8448 no, I have a transparent window, and in its place I just have wallpaper for the monitor
<InPhase>
amrelik: There are multiple ways this can happen, and you are not providing the necessary information we are asking for to figure out what is happening.
<J1A8448>
sounds like grafic card related
<J1A8448>
do you have some Aero peek through theme enabled that uses transparency?
<amrelik>
Okay, maybe I just don't have enough technical specifications, I won't waste your time
<InPhase>
Graphics card driver issue, opengl issue, multimonitor issue, nonresponsive window after heavy render... Lots of options open.
<J1A8448>
amrelik as said you can use the webversion until your problem is solved to do your homework/task
<amrelik>
InPhase J1A8448 okay, thanks for your help
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