Nautilus Gears
Description
maplesoft.com/applications/view.aspx?SID=95483&view=html&L=G
Rendered animation of the gears: youtube.com/watch?v=dtkEyZwuwH4
I'm not going to upload the SolidWorks file because it is frankly a mess of different experimentation, but I uploaded the DXF which should be easy enough to modify with most CAD software.
Update: No more breaking pins!
I've replaced the pins with a simple press fit design. Print two of the Connector Bar v2 or the Curved Connector Bar v2 (same idea, just curved for aesthetics) and snap them together! On a well calibrated printer they should snap together easily and hold tightly with friction.
If they aren't sticking together just add a drop of glue! Warning, these bars are one time use, they will be very hard to pull apart without breaking the pin.
I will keep the original bars on for reference.
Instructions
Place the gears onto a connector bar, make sure the gears align as in the pictures, snap in the second bar and enjoy.
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Hi,
I like this very much and can't wait until my printer is coming.
Regards
wolfi
This is awesome. I can't put mine down: it is too much fun to play with.
Great print! Mine runs endlessly if I hold it vertically. No problems with posts breaking but they won't hold the top bar in place so it keeps falling off. I'll probably "weld" it in place with the hot end after my next print.
It was a success at the office 8-)
For fun I had a closer look at one of the cogs in my microscope, this is what it looks like :)
It worked fine! Now the bar won't fall off, back to the office shelf with it :)
I love bringing these cool prints to work, the best part is that if someone likes it or if it breaks I can make more of them!
20% infill and 1 extra shell with ABS, the posts snapped off one side when installing the gear. Otherwise it is a nice print, I will have to check a few things and try again.
I printed the gears and bars sucessfully. Made a smallm axle for one gear and connected it to a small geared motor and two 1.5 volt batteries. it runs for hours. I posted a video on youtube but it was my first post so I am not sure if it will appear.
Try the link http://www.youtube.com/watch?v...
I had similar problems with the posts breaking. I ended up printing the lower bar rotated 90
° so the posts are horizontal. You get the same flexibility and a lot more strength. It just doesn't look as nice since you need full support.
Do these gears lock up at full rotation, or do they turn endlessly?
I printed this, but the posts snapped off before I could get it off the build plate
:(
Awesome print! Your quality is really good, I can't wait to print one of these for my 'demo' box :) :-D
I just had to print this when I saw it - really cool design. I want to think of an application for the weird gear ratios, but for now it's a cool desk object.
Can you at least upload IGES or STEP files of the parts? The gear is easy to make from the DXF, but editing an STL to change the bars is a pain. I'd still prefer solidworks files even if they are a mess, but IGES or STEP would at least be better than STL.
Awesome design!
A beautiful and cool demo object!
I like the intimate combination of completely unnatural human invention (evolvent tooth) with the logarithimic spiral ubiquitous in nature.
It converts constant angular velocity into an exponential sawtooth if I'm not mistaken.
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i often get the "spokes" printing partially. I've attributed to first layer issues, but it doesn't seem to draw them on subsequent layers either. it seems to short-circuit drawing the larger spokes. anyone else seeing that?
As said by MishaT - I scaled up to 120% and used Slic3r 0.9.8 (Perimeters set to 1) and had fairly good results.
The best solution I've found to this is just to size up the gears a bit to make the math easier for slic3r.
I am seeing the same thing with the latest update of Slic3r (0.9.2), it draws the spokes piecemeal which is giving me some problems.
I have the same issue. I suspect it's an issue with slic3r, and I'm not going to worry too much about it because it's still in development. Note that the pictures of successful prints show that the spokes are at least two extrusions wide. Right now Slic3r is trying to print mine one wide, which is apparently not enough, although in theory if I had my machine dialed in it would be ok. Either way, adjust your software settings until the software makes the spokes 2 wide.