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.
When starting the tool, the mouse pointer changes to a white cross with a red arc icon:
Information about the pointer position such as coordinates, radius, and angles are shown in real time next to the pointer in blue or optionally in separate LineEdit widgets (introduced in version 0.22).
Arc with automatically applied constraints as defined by entering tool parameters in the LineEdit widgets
(leaving only the angle of the start point diregarded)
Usage
- 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.
- The keyboard shortcut: G then A.
- Press the
- Define the positions of arc center, start point, and end point. See Point definition options below.
- The arc will be drawn and the command will finish.
Modes
If the Geometry creation "Continue Mode" preference is checked:
- The command will restart after finishing.
- Press Esc or right-click in an empty area of the 3D view to exit the command.
Point definition options
There are three options to define the position of the arc points:
- Select an existing point to copy its position.
- Click in an empty area of the 3D view to place a new point.
- Enter tool parameters (introduced in version 0.22):
- The x and y coordinates to set the arc center.
- Values for the radius, and the angle from the sketch's x axis to set the start point.
- A value for the angle along the arc to set the end point.
The options can be mixed as you like.
Press Esc or right-click in an empty area of the 3D view to clear all points defined so far and start again; repeat to exit 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).
- 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
![](/images/thumb/9/94/User_hub.png/24px-User_hub.png)
- 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
- Workbenches: Std Base, Assembly, BIM, CAM, Draft, FEM, Inspection, Material, Mesh, OpenSCAD, Part, PartDesign, Points, Reverse Engineering, Robot, Sketcher, Spreadsheet, Surface, TechDraw, Test Framework
- Hubs: User hub, Power users hub, Developer hub