Reference

1. How To Spin Drumsticks
2. To Spin Flax
3. How To Spin A Pencil
4. How To Spin A Basketball On Your Finger

Custom Spinning Wheel. Use the text box to customize the spinning wheel with your own text and decide anything. Whether it’s picking a random name, letter, number. You can also share your custom wheel with friends! Click share to get a custom link to your wheel or share directly to Facebook or Twitter. Learn to spin on an Ashford Traditional spinning wheel. Video of a spinning, patterned paper disc. At a certain speed the sets of spokes appear to slow and rotate in opposite directions. The wagon-wheel effect (alternatively called stagecoach-wheel effect or stroboscopic effect ) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum. The orbital angular momentum operator is the quantum-mechanical counterpart to the classical angular momentum of orbital revolution and appears when there is periodic structure to its wavefunction as the angle varies. Spin definition, to make (yarn) by drawing out, twisting, and winding fibers: Pioneer women spun yarn on spinning wheels.

Edit Mode

Toolbar ‣ Spin

Alt-R

The Spin tool extrudes (or duplicates it if the selection is manifold) the selected elements,rotating around a specific point and axis.

Use the tool to create the sort of objects that you would produce on a lathe(this tool is often called “lathe” tool or “sweep” tool in the literature, for this reason).In fact, it does a sort of circular extrusion of your selected elements,centered on the 3D cursor, and around the axis perpendicular to the working view…

• The point of view will determine around which axis the extrusion spins…

• The position of the 3D cursor will be the center of the rotation.

Tool Settings¶

Specifies how many copies will be extruded along the “sweep”.

How To Spin Drumsticks

Specifies the axis to use as the pivot of the spin operation.

Options¶

Specifies how many copies will be extruded along the “sweep”.

When enabled, will keep the original selected elements as separated islands in the mesh(i.e. unlinked to the result of the spin extrusion).

Specifies the angle “swept” by this tool, in degrees (e.g. set it to 180 for half a turn).

Automatically merges the first a last duplicates,if they make a full revolution which results in overlapping geometry.

Reverses the Normal’s direction for any resulting geometry.

To Spin Flax

Specifies the center of the spin. By default it uses the cursor position.

How To Spin A Pencil

Specify the spin axis as a vector. By default it uses the view axis (viewport).

Example¶

First, create a mesh representing the profile of your object.If you are modeling a hollow object, it is a good idea to thicken the outline.Fig. Glass profile. shows the profile for a wine glass we will model as a demonstration.

Go to Edit Mode and select all the vertices of the Profile with A.

We will be rotating the object around the cursor in the top view,so switch to the top view with Numpad7.

Glass profile, top view in Edit Mode, just before spinning.¶

Place the cursor along the center of the profile by selecting one of the vertices along the center,and snapping the 3D cursor to that location with Mesh ‣ Cursor ‣ Selection.(Fig. Glass profile, top view in Edit Mode, just before spinning.)shows the wine glass profile from top view, with the cursor correctly positioned.

Click the Spin button. If you have more than one 3D Viewport open, the cursor willchange to an arrow with a question mark and you will have to click in the area containingthe top view before continuing. If you have only one 3D Viewport open,the spin will happen immediately. Fig. Spun profile. shows the result of a successful spin.

Angle¶

Duplicate¶

Merge Duplicates¶

The spin operation leaves duplicate vertices along the profile.You can select all vertices at the seam with Box select B(shown in Fig. Duplicate vertices.) and perform a Merge by Distance operation.

Notice the selected vertex count before and after the Merge by Distance operationVertexcountafterremovingdoubles. If all goes well, the final vertex count(38 in this example) should match the number of the original profile noted inMesh data ‣ Vertex and face numbers.If not, some vertices were missed and you will need to weld them manually.Or, worse, too many vertices will have been merged.

How To Spin A Basketball On Your Finger

Note

Merging Two Vertices into One

To merge (weld) two vertices together, select both of them by Shift-RMBclicking on them. Press S to start scaling and hold down Ctrlwhile scaling to scale the points down to 0 units in the X, Y and Z axis. LMBto complete the scaling operation and click the Merge by Distance button inthe Toolbar in Edit Mode (also available with Context Menu ‣ Merge by Distance).

Alternatively, you can use Context Menu ‣ Merge from the same context menu(or Alt-M). Then, in the new pop-up menu, choose whether the merged vertex willbe at the center of the selected vertices or at the 3D cursor.The first choice is better in our case!

Recalculate Normals¶

All that remains now is to recalculate the normals to the outside by selecting all vertices,pressing Ctrl-N and validating Recalculate Normals Outside in the pop-up menu.