Ucs

Option

Description

Specify origin of UCS

Specifies a new UCS through one, two, or three points in the drawing:

1. Specify origin of UCS - (pick a point, or enter x,y,z coordinates.)

2. Point on X-axis/<Accept> - (enter an option:)
   • Pick a point to show the direction of the x axis; the program ghosts a line between the origin and the cursor 
   • Press Enter to keep the orientation of the x,y axes as they are; this moves the UCS to a new origin.

1. Point on the XY-plane with positive Y value or <Accept> - (enter an option:)
   • Pick a point to show the direction of the y axis, which determines the angle of the x,y-plane
   • Press Enter to keep the x,y plane flat

Face

Aligns the UCS to a face of a 3D solid; prompts you:

1. Select entity - (click the face of a 3D solid; the x-axis of the UCS lies on the edge closest to you pick point.)

2. Enter an option [Flip/Xrotate/Yrotate] <accept> - (enter an option.)
   • Flip - reverses the direction of the Z-axis
   • Xrotate - rotates the UCS 180° about the X-axis
   • YRotate - rotates the UCs 180° about the Y-axis
   • Press Enter to accept the UCS orientation picked by the program

This option works only with flat 3D faces, and not curved ones, such as on a sphere.

NAmed

Creates, restores, and deletes named UCSs; prompts you:

Enter an option [Restore/Save/Delete/? for ucs list] - (enter an option:)

• Restore - restores a named UCS; prompts you:
  UCS name to restore - (enter the name of a UCS.) As a shortcut, you can enter R directly at the 'Specify origin of UCS' prompt.

• Save - saves the current UCS by a name; prompts you:
  Enter name for saving UCS, or ? for list - (enter an option:)

  • Enter a name by which to save the UCS. As a shortcut, you can enter S directly at the 'Specify origin of UCS' prompt.

  • Press ? to list UCS names already saved in this drawing

• Delete - erases a named UCS from the drawing; prompts you:
  UCS name(s) to delete, or ? for list -

  • Enter one or more names of UCSs; separate the names with commas. As a shortcut, you can enter D directly at the 'Specify origin of UCS' prompt.

  • Press ? to list UCS names already saved in this drawing

• ? for ucs list - lists the names of UCSs in the drawing; prompts you:
  Name(s) of UCS to list <* for all> - (specify the names to list:)

  • * - lists all UCS names
  • name* - lists names of UCSs that begin with name 
  • name - lists the UCS specified by name 
    
    If necessary, press F2 to view the history prompt window.
    As a shortcut, you can enter ? directly at the 'Specify origin of UCS' prompt.

   

Entity

Aligns the UCS to a selected entity; prompts you:

Select entity for UCS definition - (choose a single entity); the orientation and type of entity define the orientation of the UCS.

• The UCS origin is located to the end point, center point, or vertex closest to the pick point.
• The x-axis is aligned with the entity or an edge
• The x,y-plane is aligned to the entity's plane
• For ambiguous objects with obvious orientation, like a circle, the orientation is maintained 

Previous

Changes the UCS to the previous one.

View

Sets the UCS to the current viewpoint: 

• The x axis and y axis are parallel to the view edges
• The z axis is perpendicular to the view, with positive Z-axis pointing to the viewer.
• The origin is copied from the previous coordinate system.

X

Rotates the current UCS about the x axis; prompts you:

Enter angle of rotation about X axis - (specify an angle or pick two points.)

Y

Rotates the current UCS about the y axis; prompts you:

Enter angle of rotation about Y axis - (specify an angle or pick two points.)

Z

Rotates the current UCS about the z axis; prompts you:

Enter angle of rotation about Z axis - (specify an angle or pick two points.)

ZAxis

Sets the UCS relative to the z-axis; prompts you to define the Z-axis:

1. Origin point - (pick a point, or enter x,y,z coordinates.)

2. Point on positive Z-axis - (pick another point, or enter x,y,z coordinates.)

• The second point defines the positive Z-axis.
• The XY-plane is perpendicular to the Z-axis with the X-axis horizontal and the Y-axis pointing upwards.

Move

Moves the origin of the current UCS, keeping the orientation of the axes; prompts you:

Origin point <0,0,0> - (pick point, or enter x,y,z coordinates.)

World

 Switches to the WCS (world coordinate system).