Datum: Difference between revisions

From FreeCAD Documentation
(→‎Notes: Since they appeared in v0.17, datum objects were intended to be used inside PartDesign Bodies. However, since they are useful "reference" objects they should be used outside of the PartDesign Workbench.)
(Part_Attachment -> Part_EditAttachment)
 
(6 intermediate revisions by 2 users not shown)
Line 2: Line 2:
<translate>
<translate>


== Introduction ==
== Introduction == <!--T:1-->


<!--T:2-->
In FreeCAD the word "[[Datum|Datum]]" is normally used to refer to auxiliary geometry in the [[PartDesign_Workbench|PartDesign Workbench]]. These geometrical elements will not form part of the final [[Shape|Shape]] of the [[Body|Body]], but can be used as references and supports for [[Sketch|sketches]] and other types of [[Feature|features]].
In FreeCAD the word "[[Datum|Datum]]" is normally used to refer to auxiliary geometry in the [[PartDesign_Workbench|PartDesign Workbench]]. These geometrical elements will not form part of the final [[Shape|Shape]] of the [[Body|Body]], but can be used as references and supports for [[Sketch|sketches]] and other types of [[Feature|features]].


<!--T:3-->
The following correspond to elements derived from the {{incode|Part::Datum}} class:
The following correspond to elements derived from the {{incode|Part::Datum}} class, itself derived from [[Part_Feature|Part Feature]]:
* [[PartDesign_Point|PartDesign Point]]
* [[PartDesign_Point|PartDesign Point]]
* [[PartDesign_Line|PartDesign Line]]
* [[PartDesign_Line|PartDesign Line]]
Line 12: Line 14:
* [[PartDesign_CoordinateSystem|PartDesign CoordinateSystem]]
* [[PartDesign_CoordinateSystem|PartDesign CoordinateSystem]]


<!--T:4-->
The following are derived directly from [[Part_Feature|Part Feature]]:
The following are derived directly from [[Part_Feature|Part Feature]]:
* [[PartDesign_ShapeBinder|PartDesign ShapeBinder]]
* [[PartDesign_ShapeBinder|PartDesign ShapeBinder]]
* [[PartDesign_SubShapeBinder|PartDesign SubShapeBinder]]
* [[PartDesign_SubShapeBinder|PartDesign SubShapeBinder]]


==Usage==
==Usage== <!--T:5-->


<!--T:6-->
# Switch to the [[PartDesign_Workbench|PartDesign Workbench]].
# Switch to the [[PartDesign_Workbench|PartDesign Workbench]].
# Press {{Button|[[File:PartDesign_Body.svg|16px]] [[PartDesign_Body|PartDesign Body]]}}.
# Press {{Button|[[File:PartDesign_Body.svg|16px]] [[PartDesign_Body|PartDesign Body]]}}.
Line 26: Line 30:
# Create a closed wire, and then use {{Button|[[File:PartDesign_Pad.svg|16px]] [[PartDesign_Pad|PartDesign Pad]]}} to extrude the sketch, and create an initial solid.
# Create a closed wire, and then use {{Button|[[File:PartDesign_Pad.svg|16px]] [[PartDesign_Pad|PartDesign Pad]]}} to extrude the sketch, and create an initial solid.


<!--T:7-->
Now you can move and rotate the DatumPlane as you wish, and the Sketch and Pad will follow its new [[Placement|Placement]].
Now you can move and rotate the DatumPlane as you wish, by changing its properties in the [[property_editor|property editor]], and the Sketch and Pad will follow its new [[Placement|Placement]].


<!--T:8-->
You can add other types of datums to be used with other sketches and features.
You can add other types of datums to be used with other sketches and features.


== Notes ==
== Notes == <!--T:9-->


<!--T:10-->
Since they appeared in v0.17, datum objects were intended to be used inside [[PartDesign_Body|PartDesign Bodies]]. However, since they are useful "reference" objects with different [[Part_Attachment|attachment methods]], it has been proposed that they should be available outside of the [[PartDesign_Workbench|PartDesign Workbench]]. In this way, they will be usable in all workbenches as supporting geometry, particularly in the context of creating [[Assembly|assemblies]].
Since they appeared in v0.17, datum objects were intended to be used inside [[PartDesign_Body|PartDesign Bodies]]. However, since they are useful "reference" objects with different [[Part_EditAttachment|attachment methods]], it has been proposed that they should be available outside of the [[PartDesign_Workbench|PartDesign Workbench]]. In this way, they will be usable in all workbenches as supporting geometry, particularly in the context of creating [[Assembly|assemblies]].
* [https://forum.freecadweb.org/viewtopic.php?f=10&t=2604 Create and display local coordinate system]
* [https://forum.freecadweb.org/viewtopic.php?f=22&t=33654 Datum objects in App::Part]
* [https://forum.freecadweb.org/viewtopic.php?t=42759 Structure toolbar and datums]
* [https://forum.freecadweb.org/viewtopic.php?f=3&t=42960 Local CS cannot be used in Part Wb?]


</translate>
</translate>
Line 38: Line 49:
{{Document objects navi{{#translation:}}}}
{{Document objects navi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}
{{Userdocnavi{{#translation:}}}}
[[Category:Glossary{{#translation:}}]]

Latest revision as of 08:37, 3 September 2021

Other languages:

Introduction

In FreeCAD the word "Datum" is normally used to refer to auxiliary geometry in the PartDesign Workbench. These geometrical elements will not form part of the final Shape of the Body, but can be used as references and supports for sketches and other types of features.

The following correspond to elements derived from the Part::Datum class, itself derived from Part Feature:

The following are derived directly from Part Feature:

Usage

  1. Switch to the PartDesign Workbench.
  2. Press PartDesign Body.
  3. Select the Origin of the Body, and make it visible by pressing the Space bar in your keyboard.
  4. Press PartDesign Plane to open the plane task panel.
  5. In the 3D view, click on one of the standard planes, for example, the XY plane. Then press OK to close the task panel.
  6. Now in the tree view, select the newly created DatumPlane, and then press PartDesign NewSketch.
  7. Create a closed wire, and then use PartDesign Pad to extrude the sketch, and create an initial solid.

Now you can move and rotate the DatumPlane as you wish, by changing its properties in the property editor, and the Sketch and Pad will follow its new Placement.

You can add other types of datums to be used with other sketches and features.

Notes

Since they appeared in v0.17, datum objects were intended to be used inside PartDesign Bodies. However, since they are useful "reference" objects with different attachment methods, it has been proposed that they should be available outside of the PartDesign Workbench. In this way, they will be usable in all workbenches as supporting geometry, particularly in the context of creating assemblies.

PartDesign
Document objects
User documentation
Retrieved from "http://wiki.freecad.org/index.php?title=Datum&oldid=1015616"