Problems with a half-torus
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@box said:
Can't type, too drunk, perhaps gif will explain better,
Top drunken gif skills Box! Thank you again.
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Well after all manner of grief with the desktop printer I've finally been able to run v36 off
And seeing that we had some weak joins and design improvements I've moved on to version 37. But... the .stl file is too big for our printer at 15mb, can any of you fine chaps show me a way of bringing the file size down? I've run the Purge Unused but it makes no difference.
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@teig said:
Yes, I've been trying to get the throat super-smooth so have been using 100 segments as standard, never considered anything else for the other parts - I suppose using less segments would keep the file size down?
Remember this bit. My answer was yes.
Reduce the number of segments in the areas that don't need to be super smooth and your file size will get smaller.
Even the circle that you are using for your follow me can have fewer segments as any faceting running up the throat would cause minimal airflow problems. -
Thanks again Box, I do remember and I tried drawing with less facets but I got in a mess with the model creating lots of radial lines and the only way out was to draw at 100 segments again. I'll try again...
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I'm not sure what you mean by the radial lines. Unless you mean unsoftened lines.
But here are two quick sample with 50 segments in the throat itself and less elsewhere for one and 100 in the other.
The file size for 50 is just over half a meg and 100 just over 2meg so you have plenty of room to play. These aren't accurate, just rough samples to show you some potential size saving options for the structure.
Your holes and cutouts certainly don't need 100 segments, keep them to what is comfortable and even run a bit of sand paper over any roughness when printed if you need to, or even a bit of a fire polish. Your v36 looks like it does come out fairly rough.
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No I don't mean unsoftened lines. You see how your base has segmenting? I had that but all the segmental radii were on the top of the base and gave me enough grief to make me bin it. I'm on the case again, at least I will be after I've had some sleeps, it's 0730 now and I'm toast
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Yep, what Box said...the best way is to optimize the segments at the beginning. That said, you can use Netfabb Basic to quickly decimate (reduce the # of polygons) an existing model with out having to re-draw the whole thing.
Here's how: open model in Netfabb, Right click > Level of Detail > Choose something like 50%.
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@d12dozr said:
Yep, what Box said...the best way is to optimize the segments at the beginning. That said, you can use Netfabb Basic to quickly decimate (reduce the # of polygons) an existing model with out having to re-draw the whole thing.
Here's how: open model in Netfabb, Right click > Level of Detail > Choose something like 50%.
It must be something like Netfabb my mate's brother had to use for this last print, he ran it through some jiggery-pokery and took the file size down by 90%.
I'll do this version again on night shift tonight with all your suggestions for minimising and see what happens, thanks again Marcus and Box
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I've just lashed one up tonight, with fewer sides/segments the .stl rolls in at 1.8mb, much better. I'll email it off for printing now.
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Nice and clean! Show us some photos after the print is back...
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Yep, a very nice bit of modelling there. Well done.
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The strengthening of the throat-base was giving me some grief until I had a eureka moment and put the channels for the air vents underneath. Took about 20 minutes to draw, a far cry from a month ago when it took me 8 hours to get an outline
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I wonder what's wrong now... It's a long night on shift and started drawing an elbow, it's an exercise really with the general (virtual) notion being to mount the bellmouth up out of the way. So I started fiddling and came up with this:
It gave me a bit of bother trying to draw the support flanges, the result being it's not solid. I'm being told I'll need to manually remove faults. That's my latest problem, I've duplicated and scaled up trying to use the 'Dave R' technique but it doesn't work, SolidSolver unable to fix it. Anyone for some guidance on this one?
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If you intersect the top face of the flange with the collar you can remove the face you can see in the tube. Then a bit of cleanup of some stray lines and it is a solid.
I can give it to you fixed if you want it.I just noticed it is a group, so edits on the big one won't flow to the small one.
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Oh fiddle! I should have done it as a component....
I'll try and figure out what you mean Box, I may be back soon... -
Strewth! How do you intersect them? There's a trio of choices, with face, with model and with selection, none seem to work.
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Here, I'll give you this gif, and see how you go.
But remember to make it a component this time.Edit:if you are wondering what the first context menu was, it was just the intersect face one, but it was off screen so a moved down and did it again to get it where you could see it.
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And I thank you once again Box, I did what you said, couldn't see what you could see to understand why it worked bu the result is solid!
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On your original when you look into the pipe you see a blue face, this it the back side of the top face of the flange, so by intersecting that face you can remove the part blocking your airflow, and then removing the other edge/ring gets rid of an internal face.
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