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Quoteecoreprap
If there is universal 3d printing filament spool standard, it will be awesome But I really doubt its feasibility.
1 Different 3d printers uses different spools. For example, the spool which suit Makerbot does not suit PICASO. The spool is installed inside of Picaso 3d printer,which has a very strict on the
width of the spool.Any one over 65mm is not suitable.As far as I learned, t
by
whosawhatsis
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Printing
QuoteSublimeEDIT: I just re-read the poly hole page and he is actually making the holes larger and then using the low polys so the edge lines up with the original circles diameter. So it still is printing undersized but he is using that to his advantage and it is not solving the issue, rather just hiding it.
Yes, if you multiply the radius of the polygon (which is measured center-to-vertex) by c
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whosawhatsis
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Experimental
You also need to check that the hole is actually the size you think it is in the model. For instance, if you use OpenSCAD and try to cut a circular hole, it will always come out smaller because of the difference between radius and apothem of a polygon. The way curves will be converted to polygons in other CAD programs may differ, but you're still likely to end up with circles smaller than what yo
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whosawhatsis
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Experimental
In addition to the rounded edges of extrusion, any Z wobble/ribbing due to Z axis issues will exacerbate these fit issues. These problems should be fixed mechanically of course, but for some users working with poorly-designed printers, that is not an option.
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whosawhatsis
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Experimental
Some of these subjects have already been discussed at length. A few of the others were dismissed as data that is not useful to the printer. This is, ultimately, a system to tell the printer everything it needs to know to print a material, so that a single gcode file can be used without modification to print in any compatible material.
Anyway, this is off-topic here. I recommend joining the G+ gr
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whosawhatsis
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Printing
Oh, this is another feature that I rely on in Slic3r and that is really needed in Cura:
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whosawhatsis
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Experimental
QuoteBackEMFBTW, I'd also like to see a sticker on each spool with the material propperties.
Material, Melt temperature, production date, shelf life, ideal storing temerature, etc., etc.
Look into the Universal Filament Identification (UFID) project.
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whosawhatsis
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Printing
I'll have to see if I can figure out how to build Cura for Mac then. I always have the worst luck when I try to build things from source...
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whosawhatsis
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Experimental
Great feature. Needed since forever . If this gets accepted and Cura gets bridge settings, I should be able to dump Slic3r entirely.
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whosawhatsis
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Experimental
RIchrap, are you sure about the 120mm core thing? I looked at some of mine, and they had cores closer to 100mm. This is a standard size for cardboard mailing tubes that would make a good source of hubs for these spools.
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whosawhatsis
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Printing
BTW, in this case, you probably wouldn't want to have empty space on your spool holder, but it would be easy enough to print a dummy spool hub in one of a couple of standard lengths (or cut a length of an existing tube of the right diameter) to fill it up. Allowing the width to be completely variable would be more problematic.
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whosawhatsis
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Printing
QuoteChriFinding one single design for all Printers won`t be very easy, people with small printers prefer small rolls (mobility), people with large printers large rolls.
So if there only should be one size, what would be the optimal amount of filament per roll?
Well, there are diameter constraints that affect the usability of the filament. Spool it too tightly and it won't straighten back out ea
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whosawhatsis
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Printing
QuoterichrapWhat amount of filament do people like? - for me 750g to 1Kg is about ideal, below that it's a pain and above to about 1.5Kg is okay, but not much more.
Outliers like the above comment notwithstanding, I think 1kg is the happy medium.
Actually, if we're making a wishlist, I'd like to have filament sold by volume (not length, though length is proportional to volume for a given diamete
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whosawhatsis
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Printing
Quotenothinman
Don't get me wrong, I'm not criticising your design, it's actually pretty interesting. It's just that it's actually hard to make tooling for it and it requires a lot of assembly.
If you're making one spool then it's fine. If you cut it with a laser -- even better.
But again: why would YOU want/need to make spools?
Marcin
I don't want to make spools (beyond proof-of-concept, anyw
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whosawhatsis
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Printing
Does someone have links to some better cardboard spools? All of the ones I've seen are worse designs than what I posted.
Even if there are better designs (and I hope there are), it doesn't hurt to have a version that can be made by anyone with a lasercutter and a way to cut lengths of tube.
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whosawhatsis
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Printing
I'm not sure how the cardboard spools are meant to be held together, but here's an idea I had. Two pieces of cardboard and a short piece of plastic or cardboard tube (length <= radius). You can wrap some packing tape around the center before spooling the plastic to hold the two halves in place.
It doesn't have the inner rim that Richrap's design has, but that could be added (strengthening t
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whosawhatsis
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Printing
NormandC Wrote:
-------------------------------------------------------
>...When using a GUI I don't
> see much use for this as modeling is done very
> differently.
I noticed that when I tried to use solidworks. Thus the "MS Paint" comment.
I've been developing a workflow using DraftSight (another Dassault product that at least has a command line, so I find it more bearable) to post-pr
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whosawhatsis
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3D Design tools
Thanks, that solved the inability to import. It still doesn't support hull(), which I use a lot, so I'm not sure how useful it will end up being, but at least I can experiment with it now.
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whosawhatsis
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3D Design tools
BTW, I tried the FreeCAD solution, but I had two major problems:
1: It doesn't work at all in the Mac version.
2: It doesn't support hull(), which I've been using a lot...
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whosawhatsis
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3D Design tools
nophead Wrote:
-------------------------------------------------------
> Openscad won't export true circles. The reason
> they are circles in the PDF is because I wrote a
> Python script to detect circular polygons and work
> out the centre and radius. It then writes an SVG
> which gets converted to PDF by Inkscape.
>
> It would be easy to make a script that writes DXF
>
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whosawhatsis
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3D Design tools
Bluetooth works, but it's best used to control a printer that is going to run its print from an SD card rather than streaming the gcode over the bluetooth link. There are good setup instructions on the Bukobot wiki:
by
whosawhatsis
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Developers
Getting Android USB host mode to communicate with FTDI/Atmel UARTs would not just allow controlling Repraps. The code could be re-used to allow an Android device to program an Arduino or communicate with one in any other way that a regular PC can (as well as other devices using the same USB-serial protocol). Frankly, I think it's pretty stupid that Android/Arduino connections weren't done this wa
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whosawhatsis
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Developers
I've done some modifications to the code with the goal of making it a useful gcode inspector.
I've started a Github repo:
Here's a video of it in action:
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whosawhatsis
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RepRap Host
I ordered from Mcmaster and other places. I would recommend them for pretty much everything except bearings (they can be obtained MUCH more cheaply elsewhere), and of course, machined parts that you can get from reprap-specific vendors online.
I built mine large, almost mendel-sized, but I'll provide my information. The only differences are in rod and belt length, and in the dimensions of the th
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whosawhatsis
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General
The SD card part doesn't surprise me. We know that the software stores print instructions on the device so that printing can continue with the computer unplugged, and an SD card is apparently among the easiest ways to interface storage for such things with a µC like the ATmega chips used to run the reprap firmware. I'm a little surprised that it doesn't have a failure mode better than just crashi
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whosawhatsis
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General
Good idea, though. The software may not save a gcode file, but it may be possible to capture the output as gcode or some other standard format that that we could decode to see exactly what it's doing. They may even be using the USB connection to load reprap-syle gcode to the controller board.
It's all Macs here, anyone else wanna give it a shot?
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whosawhatsis
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General
There are some good pictures of the raft here:
The only pictures I see that show the bottom side of a part at all are on this page:
From the last image on the first link, it definitely does appear that, somehow, the edge of the part adheres to the raft more than the center.
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whosawhatsis
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General
There is no visible gap between the object and the raft, so if there is a perforation layer, it includes an outline of the object. This means no corners hanging loose. The inner part, and I'm just spitballing here, could be not only sparse (no more than 50% infill), but it could also be extruded at a lower rate while moving the printhead at full speed, which might cause the layer to settle a litt
by
whosawhatsis
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General
Looking at the photos, their bottom layer consists of a wide outline filled with a raft consisting of strips spaced 2 or 3 times as widely as other rafts I've seen. The following layer is the same, but with the strips at 90 degrees and much closer together (maybe a little closer than standard rafts). The third layer is a solid one only slightly wider than the base of the printed object. This is p
by
whosawhatsis
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General
Supports should definitely be a priority for us. Many experiments have been done with alternate materials for supports, but UP! proves that same-material support structures are a viable option. I think I have mostly figured out their algorithm for generating the support structures. One of these days I'll have to look into the code of some of the skein programs and see if I can understand them wel
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whosawhatsis
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General
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