Loading

Ellipse Gears

by drayde, published

Ellipse Gears by drayde Dec 28, 2010
31 Share
Download All Files

Thing Apps Enabled

Order This Printed View All Apps

Contents

License

Ellipse Gears by drayde is licensed under the Creative Commons - Attribution license.

Use This Project

Give a Shout Out

If you print this Thing and display it in public proudly give attribution by printing and displaying this tag.

Print Thing Tag

Thing Statistics

24795Views 5053Downloads

Summary

I adapted stickoutrock's Crosslink Ellipse Gears to be printable on a 3D printer. It's similar to natetrue's version ( http://www.thingiverse.com/thing:1538 ), but I created a completely new design in OpenSCAD, which uses a different type of joint, which should be more robust. The joints also do not stick out of the holes in the ellipse gear, avoiding the gears to get stuck during the rotation.

Here is a video of this thing: http://vimeo.com/18244936

Instructions

You need 2 of the gears and 2 links. The gears are NOT symmetrical. Before snapping them together, make sure you have the gears aligned correctly: Place them on top of each other as shown in the dxf preview and make sure they have the same orientation. Move one of them sideways until the teeth mate.

All Apps

3D Print your file with 3D Hubs, the world’s largest online marketplace for 3D printing services.

App Info Launch App

Auto-magically prepare your 3D models for 3D printing. A cloud based 3D models Preparing and Healing solution for 3D Printing, MakePrintable provides features for model repairing, wall thickness...

App Info Launch App

Kiri:Moto is an integrated cloud-based slicer and tool-path generator for 3D Printing, CAM / CNC and Laser cutting. *** 3D printing mode provides model slicing and GCode output using built-in...

App Info Launch App
KiriMoto Thing App

With 3D Slash, you can edit 3d models like a stonecutter. A unique interface: as fun as a building game! The perfect tool for non-designers and children to create in 3D.

App Info Launch App

Print through a distributed network of 3D printing enthusiasts from across the US, at a fraction of the cost of the competitors. We want to change the world for the better through technology, an...

App Info Launch App

Quickly Scale, Mirror or Cut your 3D Models

App Info Launch App

3D Print a wide range of designs with Treatstock. Easy to use tools to get the perfect result. The global 3D printing network that connects you with high-quality and fast working print services nea...

App Info Launch App

I've printed the link but it didn't print the connectors, just the flat plate. Downloaded, sliced and printed again but with same result. Can anyone help?

really much play in it, but its working..

thanks!

After two hours of waiting Axon could not build the gcode for just one gear. It was stuck on carve. Any ideas?

I don't recall having any problems. What version of skeinforge?

Hmm, I'm using netfabb, so I cannot really help here. Maybe try using skeinforge directly?

Mine finally printed, after much kicking of the cupcake.

One weird thing I've noticed, is that the gears never actually touch, they mesh but there is an ~.5mm gap between the gears at all locations.

Used the joiner from mackal linked above. I am SUPER-impressed; it all snapped together right out of the printer. Nothing too tight, nothign too lose; no extra play between the gears, but not too tight either. ABSOLUTELY. PERFECT.

Printed it on an UP! at medium (0.30mm) - very loose...

Using mackal's linkage this is much better!

http://www.thingiverse.com/thing:5368http://www.thingiverse.com/thi...

Thanks drayde and mackal!

Ellipse Gears
by mackal

I'm gonna have to try this! I'm actually in the middle of printing the other elliptical gears as I write - I found that the link piece is definitely very brittle, particularly when printing with PLA.

Very nice looking design but came out a bit loose on my Makerbot + HBP. I may tweak the OpenSCAD file to reduce the link length - thanks for including that drayde. Making the gears parametric would be heroic too, but my maths isn't up to it!

Wow, that was quick! Nice print!

Yes, the link appears to be a bit too long in the position where the links form an "X". It already tried to make them a bit smaller, but then it's too short for the horizontal position.

I suspect the holes for the joints to be slightly off.

Having the gears created by script would be awesome. Any idea how to do that? Ideally I'd like to be able to create the 2D outline by script and then extrude it, but I think OpenSCAD cannot do that.

I like what GregFrost (http://thingiverse.com/GregFrost)thingiverse.com/GregFrost) did with his OpenSCAD gear generating code in http://thingiverse.com/thing:3575thingiverse.com/thing:3575 , but I'm not sure how to extend that into elliptical gears. It also seems I'm incapable of linking to Thingiverse pages from these comments. My linking fu is weak.

Parametric Involute Bevel and Spur Gears

Wow, Greg's gear script is awesome. It is possible to script 2D shapes and extrude them. If I find time I'll check if I can modify the script to do elliptical gears.

Top