8

Lathe Surface 1193
Degrees —
Sets the angle of rotation. At 360 degrees
(the default), the surface completely surrounds
the a xis. At lower values, t he surface is a partial
rotation.
A p artial lathe (degrees=225)
Direction group
X, Y, and Z—Choose the axis of rotation. Default=Y.
X, Y, and Z rotations of the same curve
Align group
These buttons position the axis of rotat ion relative
to the curve.
Min—(The default.) Locates the lathe axis at the
cur ve’s negative local X-axis boundary.
Center—Locatesthelatheaxisatthecurve’scenter.
Max—Locates the lathe axis at the curve’s positive
local X-axis boundary.
Min, Center, and Max lathes of the same curve
Start Point—Adjusts the position of the curve’s
start point. This can help eliminate unwanted
tw ists or "buckles" in the surface.
This control is disabled if the curve is not a closed
curve.
Thestartpointisdisplayedasabluecircle.
Flip Normals—Lets you flip the surface normals
at creation time. (After creation, you can flip
normals using controls on the Surface Common
rollout.)
Cap—When on, two surfaces are generated to close
the ends of the lathe. While they are present, the
cap surfaces are maintained so they match the
dimensions of the lathe sur face. The lathe must b e
a 360-degree lathe.
The Cap check box appears
only on the creation
rollout. If you want to remove the caps later ,
simply select them as sur face sub-objects and
delete them. Think of lathe capping as a workflow
shortcut rather than a property (or parameter) of
lathe surfaces.
To flip the normal of a lathe cap, select it a s a
Surface sub-object and use the Flip Normals toggle
on the Surface Common rollout.