#Openscad oval full#
#Openscad oval code#

directional: A directional encoder renders two sets of slots, 90 deg out of phase.

timingHoleOutPad: The outside padding for the timing holes.

timingHoleMidPad: The middle padding if direction timing holes is selected.

timingHoleInPad: The inside padding for the timing holes.

timingHoles: The number of timing holes to carve into the rim.

rimHeight: The height of the rim portion of the wheel.

You can also double resolution by looking for both rising and falling edges. Directional timing holes essentially double the resolution. This allows you to stack sensors at the same location over the wheel instead of trying to position them along the circumference. Directional timing holes will produce a second set of holes that are 90 degrees out of phase with the first. See the compiler output for helpful information about the distance indicated by each timing hole. Use the padding parameters to adjust the location of those holes. The rim also supports rotary encoder timing holes for wheel feedback. Keep this in mind when you’re using tires - as an example, the rim height should not be smaller than the radius of o-ring tires. Installed tires (such as o-rings, rubber bands, etc) are set into grooves carved out of therim, while trads are added onto it. The rim sits at at the outside of the spokes and supports the tires or added treads.

tireStretch: Circumferential stretch percentage (usually 1 + 0-5%) - How much to you want to stretch it to get it on?.

tireID: Internal diameter (ID) - How wide is the inside opening?.

tireCSDiameter: Cross-sectional diameter (CS) - How thick is the tire rubber?.

wheelWidth: The width (or thickness) of the the wheel.

If you’re not using any tire at all, set the tireCSDiameter to zero. If you’re using o-rings, the tireCSDiameter should be the cross-section diameter of the o-ring, or if you’re using some other flat tire material (such as rubber bands), jsut specify the its thickness. In this section, specify the properties of the tires you’re using, and this will define the diameter of the wheel. The source file is available at, or on github at. In these cases, services such as Shapeways could come in handy. It’s important to note that you can configure this wheel to such an extend that it may not be printable at home with extruded plastic printers. Highly Configurable Parametric Robot Wheel – Hub and Rim Styles Highly Configurable Parametric Robot Wheel – Spiral variation Highly Configurable Parametric Robot Wheel – Spoke Styles Highly Configurable Parametric Robot Wheel – Tread Styles Highly Configurable Parametric Robot Wheel – Biohazard variation

#Openscad oval full#

For example, as shown in these images, the Spiral style can be used to create a variety of interesting designs that you might not think of when you think “spiral.” After the images you’ll find full details on the parameters. Plus, I’m still adding features as I think of them.įirst, here are a few images of the types of the various basic elements, as well as a few variations that show the flexibility of the designs. It includes twelve tread patterns (all configurable in often surprising ways), eight core spoke patterns (also highly customizable), configurable support for o-rings, bands, and even optical encoder timing slots (directional and non-directional), and a lot more. I recently decided to combine them all into one massively configurable wheel model, and add a number of new features as well. The result is an OpenSCAD file with 46 parameters that provides a limitless set of combinations and wheel designs.

#Openscad oval code#

> This is pretty much the same sort of code used for an oval in shapes.scad, except that oval uses a cylinder instead of a sphere and the scale is of course different.I built a framework for robot wheels a while back using OpenSCAD and used it to create a few different wheel styles. > On 29 July 2010 22:15, Andrew Plumb wrote: It's just not very evenly distributed' - William Gibson > missing something? Is there a repository for this stuff that I haven't > PS: I've also not found much in the way of user contributed libs.

If it doesn't, then implementing it solves two issues. > should already be written, and it should be just a matter of exposing Therefore if openscad supports DXF's ellipses, the code > Note: I only suggest the second one, as I know that DXF supports > If there is a way to do this as a functional primitive built into openscad. > Someone has implemented an ellipse in code (in a lib). > don't believe this is a true ellipse, unless someone can prove it > While I know there is the 'oval' command in the shapes.scad lib, I I'm wondering if anyone has looked at ellipses?