Part Design Tasca, Scavo
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Description
Descrizione
Lo strumento Tasca scava un solido estrudendo uno schizzo, o una faccia di un solido, in un percorso rettilineo e sottraendolo dal solido.
A sinistra lo schizzo del profilo (A) è mappato sulla faccia superiore del solido di base (B); a destra il risultato della tasca.
Usage
Utilizzo
- Selezionare lo schizzo da usare per lo scavo.
- Lo schizzo selezionato deve essere mappato su una faccia planare di un solido esistente o su un oggetto Part Design, altrimenti si riceve un messaggio di errore. versione 0.16 e precedenti
- Premere il pulsante
Pocket.
- Impostare i parametri Pocket (vedere successiva sezione).
- Cliccare OK.
When selecting a single sketch, it can have multiple enclosed profiles inside a larger one, for example a rectangle with two circles inside it. But the profiles may not intersect each other. introduced in version 0.20
When creating a pocket, the the Pocket parameters dialog will be shown. It offers the following settings:
Type
Type offers five different ways of specifying the length to which the pocket will be extruded:
Dimension
Quando si crea una cavità, la finestra di dialogo Parametri Tasca offre quattro diversi modi per specificare la lunghezza (profondità) di estrusione dello scavo:
Quota
Inserire un valore numerico per la profondità della tasca. La direzione di default per l'estrusione è verso l'interno del supporto. Le estrusioni si realizzano normali al piano di definizione dello schizzo.
Le quote negative non sono possibili. Al suo posto usare invece l'opzione Invertita.
Fino al primo
La tasca viene prodotta fino alla prima faccia del supporto nella direzione di estrusione. In altre parole, viene asportato tutto il materiale fino a raggiungere uno spazio vuoto.
Attraverso tutto
La tasca scava attraverso tutto il materiale nella direzione di estrusione. Quando si attiva l'opzione Simmetrico al piano lo scavo viene prodotto attraverso tutto il materiale in entrambe le direzioni.
Fino alla faccia
La tasca si estrude fino a una faccia del supporto che può essere scelta facendo clic su di essa.
Due dimensioni
Questo permette di inserire una seconda lunghezza per estendere la tasca nella direzione opposta (nel supporto). Anche questa può essere cambiata spuntando l'opzione Invertita. versione 0.17 e superiori
Through all
The pocket will extrude through all objects in the extrusion direction. With the option Symmetric to plane the pad will cut through all material in both directions.
Note: For technical reasons, Through All is actually a 10 meter deep pocket. If you need deeper pockets, use the type Dimension.
To first
The pocket will extrude up to the first face of the support in the extrusion direction. In other words, it will cut through all material until it reaches an empty space.
Up to face
The pocket will extrude up to a face in the model that can be chosen by clicking on it.
Two dimensions
This allows to enter a second length in which the pocket should extend in the opposite direction (into the support). The directions can be switched by ticking the Reversed option.
Length
Defines the length of the pocket. Multiple units can be used independently of the user's units preferences (m, cm, mm, nm, ft or ', in or "). This option is only available when Type is either Dimension or Two dimensions.
Offset to face
Offset from face at which the pocket will end. This option is only available when Type is either Through all, To first or Up to face.
Direction
Direction/edge
You can select the direction of the extrusion:
- Face/Sketch normal The sketch or face is extruded along its normal. If you have selected several sketches or faces to be extruded, the normal of the first one will be used. introduced in version 0.20
- Select reference... The sketch is extruded along an edge of the 3D model. When this is method selected, you can click on any edge in the 3D model and it becomes the direction vector for the extrusion.
- Custom direction The sketch is extruded along a direction that can be specified via vector values.
Show direction
If checked, the pocket direction will be shown. In case the pocket uses a Custom direction, it can be changed.
Length along sketch normal
If checked, the pocket length is measured along the sketch normal, otherwise along the custom direction.
Symmetric to plane
Tick the checkbox to extrude half of the given length to either side of the sketch or plane.
Reversed
Reverses the direction of the pocket.
Taper angle
Tapers the pocket in the extrusion direction by the given angle. A positive angle means the outer pocket border gets wider. This option is only available if Type is either Dimension or Two dimensions. Note that inner structures receive the opposite taper angle. This is done to facilitate the design of molds and molded parts.
Limitations:
- Sketches containing B-Splines often cannot be properly tapered. This is a limitation of the OpenCASCADE kernel that FreeCAD uses.
- For larger angles tapering will fail if the end face of the pocket would have fewer edges than the start face/sketch.
2nd length
Defines the length of the pocket in the opposite extrusion direction. Multiple units can be used independently of the user's units preferences (m, cm, mm, nm, ft or ', in or "). This option is only available if Type is Two dimensions.
2nd taper angle
Tapers the pocket in the opposite extrusion direction by the given angle. A positive angle means the outer pocket border gets wider. This option is only available if Type is Two dimensions. Note that inner structures receive the opposite taper angle. This is done to facilitate the design of molds and molded parts.
Properties
- DatiType: Type of ways how the pocket will be extruded, see Options.
- DatiLength: Defines the length of the pocket, see Options.
- DatiLength2: Second pocket length in case the DatiType is TwoLengths, see Options.
- DatiUse Custom Vector: introduced in version 0.20 If checked, the pocket direction will not be the normal vector of the sketch but the given vector, see Options.
- DatiDirection: introduced in version 0.20 Vector of the pocket direction if DatiUse Custom Vector is used.
- DatiAlong Sketch Normal: introduced in version 0.20 If true, the pocket length is measured along the sketch normal. Otherwise and if DatiUse Custom Vector is used, it is measured along the custom direction.
- DatiUp To Face: A face the pocket will extrude up to, see Options.
- DatiRefine: True or false. Cleans up residual edges left after the operation. This property is initially set according to the user's settings (found in Preferences → Part design → General → Model settings). It can be manually changed afterwards. This property will be saved with the FreeCAD document.
Limitations
Limitazioni
- Quando è possibile utilizzare il tipo Quota oppure Attraverso tutto perché gli altri tipi a volte danno problemi quando essi vengono utilizzati per essere replicati in schiere.
- Inoltre, la funzione tasca ha le stesse limitazioni della funzione Pad.
- Structure tools: Part, Group
- Helper tools: Create body, Create sketch, Edit sketch, Map sketch to face
- Modeling tools
- Datum tools: Create a datum point, Create a datum line, Create a datum plane, Create a local coordinate system, Create a shape binder, Create a sub-object(s) shape binder, Create a clone
- Additive tools: Pad, Revolution, Additive loft, Additive pipe, Additive helix, Additive box, Additive cylinder, Additive sphere, Additive cone, Additive ellipsoid, Additive torus, Additive prism, Additive wedge
- Subtractive tools: Pocket, Hole, Groove, Subtractive loft, Subtractive pipe, Subtractive helix, Subtractive box, Subtractive cylinder, Subtractive sphere, Subtractive cone, Subtractive ellipsoid, Subtractive torus, Subtractive prism, Subtractive wedge
- Transformation tools: Mirrored, Linear Pattern, Polar Pattern, Create MultiTransform, Scaled
- Dress-up tools: Fillet, Chamfer, Draft, Thickness
- Boolean: Boolean operation
- Extras: Migrate, Sprocket, Involute gear, Shaft design wizard
- Context menu: Set tip, Move object to other body, Move object after other object, Appearance, Set colors

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