<Guest88>
Hello everybody, I'm new on this list. I would like to get some information about how to hadle a situation when creating the STL file takes a very long time ?
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<Scopeuk>
Guest8432 that depends heavily on what your model looks like
<Scopeuk>
There are some experimental features which can make things quicker but it is frequently possible to achieve a lot through adjusting 5he model, apologies should have been Guest88
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<Guest42>
Hi. Can OpenSCAD import .OBJ & .MTL files? I have a PCB I designed, which I want to see with my OpenSCAD
<teepee>
Guest42: obj yes, very recent change, so this has not seen many real world use probably and needs the dev snapshots
<teepee>
no idea what MTL is
<Guest42>
.OBJ is the file that shows the PCB, I think that the MTL includes the parts on the PCB.
<Guest42>
What about OBJ? I tried importing it - no good.
<teepee>
what happened? and did you use the dev snapshot?
<lf94>
Anyone know of a cylindrical enclosure I can use to hide a solder job on a headphone wire?
<lf94>
Something that's just two halves I can snap together
<InPhase>
lf94: Shrinkwrap tubing is the optimal solution.
<InPhase>
lf94: With the caveat that you apply it before you do the work.
<teepee>
Guest42: I tried to add IDFv3 import but that's not finished, but I have to research MTL
<InPhase>
lf94: Electrical tape can be used after the fact, but eventually comes off a wire under lets of motion. A hot glue gun produces a covering that is hard to make look good, but that tends to be extremely sturdy and well sealed.
<InPhase>
lf94: If you know someone with a 3D printer... you could maybe try to print two halves of a thin cylinder TPU enclosure, then put some sort of flexible adhesive on that like hot glue or gorilla glue, and glue it around the solder job. You just want to avoid hard enclosures, because they add strain points and then you're soldering again later.
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<J23k7>
hot glue on backing paper then wrap around and remove after cooling
<guso78[m]>
Yeahh, great idea
<peepsalot>
i wonder if rubber cement + fabric that it can soak through would work, for a bit more flexibility
<InPhase>
peepsalot: The flexible version of fiberglass and epoxy. I like it. :)
<peepsalot>
yeah, composites are where its at
<InPhase>
Certainly sticky to apply, but would be sturdy if you could get it to stay on long enough to dry.
<lf94>
InPhase: I ask because I have no shrink wrap, but also, shrink tubing doesn't look good
<lf94>
I'd rather 3D print a nice little cylinder
<lf94>
InPhase: the idea was to wind a tiny part of the wire around a peg on the inside
<lf94>
Ever take apart an SNES or NES controller? Like that
<lf94>
It reduces the strain on the wire joints
<lf94>
> rubber cement < haha, good idea, if I had it
<lf94>
Really the cylinder is meant to hide the job.
<lf94>
These wires are stupid small, let me describe what I'm looking at.
<lf94>
You have the sheath with 5 wires inside. 3 are you typical small gauge wires, but then there are 2 more which are even tinier. All the wires are not solid but those individual wires with material in the centers.
<lf94>
Every. single. wire. is coated.
<lf94>
Sanding is destroying the wires
<lf94>
I've now come up with a way to repair them, but holy man, talk about painful
<lf94>
Basically, strip back everything as per usual, but twist them like you do larger appliances.
<lf94>
Then apply flux, and run solder on the twist
<peepsalot>
snap fit parts are fiddly to do with FDM, and thin walls used for tabs are often too fragile, depending on layer orientation, wall thickness, material etc.
<lf94>
The solder collects the plastic coating
<lf94>
repeat the process until you see the solder beginning to adhere
<lf94>
Then apply nail polish as the insulation
<lf94>
(Because they are way too small for anything else)
<lf94>
Then finally I need to hide it all.
<lf94>
Yeah, snap fits are not simple for FDM, i'm aware
<lf94>
But I dont mind trying a few times
<lf94>
I'd super appreciate if you guys wrote me up a script in parallel to me doing this
<lf94>
Just make it adjustable for the wire to feed through the holes
<lf94>
(obv. not even a thing to think about when writing it)
<lf94>
"you guys"
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<lf94>
i.e. "Any one who's got like an hour to burn" :D
<othx>
peepsalot linked to YouTube video "How To Splice Wires to NASA Standards" => 1 IRC mentions
<lf94>
InPhase: needs two little pegs inside though
<InPhase>
lf94: It was designed for the express purpose of slipping on without removing the existing filament, which aligns with your needs here, if you need to enclose a messy solder job.
<lf94>
peepsalot: not impressed, those are solid wires hahaha
<InPhase>
lf94: And if you wanted you could adhesive the ends closed or something then if you really wanted to close it down.
<InPhase>
lf94: The tabs could be removed if you don't want to remove it later.
<lf94>
Yeah plan is to use super glue even on a snap fit
<lf94>
I just need something with alignment pegs I guess, not even snap fit
<lf94>
eh, guess i'll do something later...
<InPhase>
Flexible adhesive is wiser than superglue here.
<lf94>
I've had to repair a lot of wires because of these rabbits; might as well design something for reuse
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<peepsalot>
i guess the overall dimensions would dictate a lot in terms of what I would attempt to design: what are the dimensions of the volume your are trying to enclose, and how much added part thickness are you willing to tolerate around that?
<lf94>
1mm thickness of the shell; inside volume I think just needs to fit the equivalent of the incoming wire diameter * 4
<lf94>
For me it's about putting code CAD in more hands; I don't even care it's Python
<InPhase>
lf94: Inigo Quilez, rather than Inigo Iquilez.
<teepee>
what's the saying? "preaching to the choir"
<lf94>
InPhase: thanks :) Iquilez I guess is their alias I always mix up.
<peepsalot>
iq is his shadertoy handle iirc
<InPhase>
lf94: And I do think we'll end up getting that merged. The site is at least pretty, and might be a good place to gather usage examples for that.
<teepee>
yeah, I just remember "IQ"
<InPhase>
What PR does that texture feature belong to?
<InPhase>
I assume that's separate from the python work, as it's demonstrated in scad code.
<teepee>
sounds not easy to google for, but "shader iq" actually works
<lf94>
The guy's *the* source for that stuff
<InPhase>
teepee: And then you get the smart shader guy.
<lf94>
The goal of the site (for me at least) is to get people using that branch, get feedback, etc
<lf94>
Hopefully speeding up the merging of it
<lf94>
(I don't care for the other features - the Python integration I believe is going to have the largest impact on the space)
<lf94>
OpenSCAD is much better even if it's not Python
<teepee>
it's different. "better" really is relative to the use case
<lf94>
(And it wasn't just "I used CadQuery one night for a small thing", I spent months using it)
<lf94>
No, I've used it extensively. It is not better than OpenSCAD.
<lf94>
The engine fails on you constantly
<teepee>
it does have some features that are currently missing in openscad, so if you need those, I would assume it's "better"
<teepee>
obvious candidate: STEP export
<lf94>
I think we discussed this: STEP export is dependent on what the manufacturer accepts, because it's such a large spec that becomes essentially meaningless
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<lf94>
IIRC we said OpenSCAD could have STEP export no problem, using one of the types defined in STEP
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<teepee>
I think the 235 spec would be accepted by most. but yes, it's a huge mess
<teepee>
yes, I do believe it would be possible, going through FreeCAD proves that
<teepee>
but it's a plain fact that it's currently not implemented
<lf94>
You could probably take an STL and find another tool that does it
<teepee>
you can't get a reasonable STEP from STL
<teepee>
sure, it supports just pushing a mesh into it, but that will not solve the issue if a manufacturer wants "a STEP file"
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<Scopeuk>
I suppose that depends if they "want a a step" for the sake of it being step, or they depend upon and exploit some aspect of the spec
<teepee>
yeah, as far as I can tell, one thing is "circle being circles"
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<J23k7>
if you tell a CNC to make a 72-gon, you get 72 and not a circle - and then customer complain. And a lathe can only be used if it is, if there are fragments they have more work
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<J23k7>
and openSCAD (manifold) show problems if using $fs=0.001