Sketcher CreateArc
Sketcher CreateArc |
Menu location |
---|
Sketch → Sketcher geometries → Create arc by center |
Workbenches |
Sketcher |
Default shortcut |
G A |
Introduced in version |
- |
See also |
Sketcher Circle |
Description
The Sketcher CreateArc tool draws an arc by picking three points: the center, the start point for the radius, and the end point for the angle.
While this tool is active, the mouse pointer changes to a white cross with a red arc icon:
Arc with automatically applied constraints as defined by entering on-view-parameters
(leaving only the angle of the start point disregarded)
Usage
See also: Drawing aids.
- There are several ways to invoke the command:
- Press the Center and end points button.
- Select the Sketcher → Sketcher geometries → Create arc by center option from the menu.
- Right-click in the Sketch view and select the Create arc by center option from the context menu.
- The keyboard shortcut: G then A.
- An Arc parameters section is added at the top of the Sketcher Dialog.
- Optionally change the command Mode:
- Mode
Center
:- Pick the center of the arc. Or using OVP: enter the X and Y coordinates to place the center.
- Pick the start point of the arc, this also defines the radius. Or using OVP: enter the radius, and the angle to place the start point.
- Pick the end point of the arc. Or using OVP: enter the aperture angle to place the end point.
- Mode
3 rim points
:- Pick the start and end points of the arc.
- Pick another point to define the radius.
- Mode
Pick points in an empty area of the 3D view, or on an existing object (auto constraints must be active in the Task panel).
- The arc is created.
- Until the last point is placed Esc or a right-click in the 3D view will abort the command.
Notes
- Tool parameters and their related LineEdit widgets are only available if the On-Views-Parameters preference is set to
All
orOnly dimensional
. - If tool parameters were entered the corresponding constraints are also applied to the arc accordingly (introduced in version 0.22).
Sketcher
- General: Create sketch, Edit sketch, Attach sketch, Reorient sketch, Validate sketch, Merge sketches, Mirror sketch, Leave sketch, View sketch, View section, Toggle grid, Toggle snap, Configure rendering order, Stop operation
- Sketcher geometries: Point, Polyline, Line, Arc, Arc by 3 points, Arc of ellipse, Arc of hyperbola, Arc of parabola, Circle, Circle by 3 points, Ellipse, Ellipse by 3 points, Rectangle, Centered rectangle, Rounded rectangle, Triangle, Square, Pentagon, Hexagon, Heptagon, Octagon, Regular polygon, Slot, Arc slot, B-spline by control points, Periodic B-spline by control points, B-spline by knots, Periodic B-spline by knots, Toggle construction geometry
- Sketcher constraints:
- Dimensional constraints: Dimension, Horizontal distance, Vertical distance, Distance, Auto radius/diameter, Radius, Diameter, Angle, Lock
- Geometric constraints: Coincident (unified), Coincident, Point on object, Horizontal/vertical, Horizontal, Vertical, Parallel, Perpendicular, Tangent or collinear, Equal, Symmetric, Block
- Other constraints: Refraction (Snell's law)
- Constraint tools: Toggle driving/reference constraint, Activate/deactivate constraint
- Sketcher tools: Fillet, Chamfer, Trim, Split, Extend, External geometry, Carbon copy, Select origin, Select horizontal axis, Select vertical axis, Array transform, Polar transform, Scale transform, Offset geometry, Symmetry, Remove axes alignment, Delete all geometry, Delete all constraints
- Sketcher B-spline tools: Convert geometry to B-spline, Increase B-spline degree, Decrease B-spline degree, Increase knot multiplicity, Decrease knot multiplicity, Insert knot, Join curves
- Sketcher visual: Select unconstrained DoF, Select associated constraints, Select associated geometry, Select redundant constraints, Select conflicting constraints, Show/hide circular helper for arcs, Show/hide B-spline degree, Show/hide B-spline control polygon, Show/hide B-spline curvature comb, Show/hide B-spline knot multiplicity, Show/hide B-spline control point weight, Show/hide internal geometry, Switch virtual space
- Additional: Sketcher Dialog, Preferences, Sketcher scripting
User documentation
- Getting started
- Installation: Download, Windows, Linux, Mac, Additional components, Docker, AppImage, Ubuntu Snap
- Basics: About FreeCAD, Interface, Mouse navigation, Selection methods, Object name, Preferences, Workbenches, Document structure, Properties, Help FreeCAD, Donate
- Help: Tutorials, Video tutorials
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- Hubs: User hub, Power users hub, Developer hub