PartDesign: Scalare

This page is a translated version of the page PartDesign Scaled and the translation is 6% complete.

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Create MultiTransform

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PartDesign

Menu location
PartDesign Scaled
PartDesign → MultiTransform
Workbenches
PartDesign, Complete
Default shortcut
None
Introduced in version
-
See also
None

Introducere

'Scale features' - This tool takes a set of one or more selected features as its input (the 'originals'), and scales them by a given factor. Since the scaling takes place around the centre of gravity of the selected features, they usually disappear inside the scaled versions. Therefore, normally it is only useful to use scaling as part of the MultiTransform feature.

PartDesign Scaled is one of the transformation options of MultiTransform. Contrary to the other options it is not available as a separate tool. It turns a transformation result into a sequence of scaled objects with evenly distributed scale factors. Starting with the unscaled base feature of the previous transformation the scale factor increases or decreases until reaching the given value at the last item.

A linear pattern and a polar pattern → Scaled the linear pattern with 3 steps (occurrences) and the polar pattern with 12 steps

If there is no previous transformation within the MultiTransform feature, scaled items will be placed at the same position as the base feature. This may result in unexpected shapes if the base feature isn't covered completely by the scaled object. And thus it is not recommended to use Scaled as the first transformation of a MultiTransform feature.

A base feature with a hole → Scaled object with 2 occurrences → Scaled object with 4 occurrences

Notă

De la FreeCAD 0.15, această funcție nu este valabilă direct, dar este inclusă ca o componentă MultiTransform.

Scaling a transformed feature

Do one of the following:
- Double-click the MultiTransform object in the Tree view.
- Right-click the MultiTransform object in the Tree view and select Edit MultiTransform from the context menu.
The MultiTransform parameters task panel opens.
Right-click in the Transformations list and select Add scaled transformation from the context menu.
A Scaled item is added to the list and the task panel is extended at the bottom to allow to set the Factor and Occurrences. See Options for more information.
Press the OK bar at the bottom.
Press the OK button at the top to finish.

Scaling a single feature

Select a feature of the current body in the Tree view.
Do one of the following:
- Press the MultiTransform button.
- Select the Part Design → Apply a pattern → Create MultiTransform option from the menu.
The MultiTransform parameters task panel opens. See above.

Opțiuni

When creating a scaled feature, the 'scaled parameters' dialogue offers the following options:

Select originals

The list view shows the 'originals', the features that are to be scaled. Clicking on any feature will add it to the list.

Factor and Occurrences

Specifies the maximum factor which the features are to be scaled to, and the total number of scaled shapes (including the original feature).

Factor: The factor to which the last feature is scaled.
Occurrences: Number of steps from unscaled (1) to Factor (including base and last feature).
- A scaled transformation accepts the number of occurrences of the previous transformation as maximum value or any integer divisor of that number returning an integer result. So 12, 6, 4, 3, and 2 are valid for a Linear or Polar Pattern with 12 occurrences.
- A scaled single feature accepts any integer number larger than 1.

Notes

The center of scaling is the features's center of gravity and that may cause:
- A growing item to protrude on the opposite side of the parent feature.
- A shrinking item to lose all contact with the parent feature and disappear.
- A shrinking pocket to become an invisible cavity inside the parent feature.

Create MultiTransform

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PartDesign