Geometric Tolerance Dialog Box — GstarCAD 2027

Geometric Tolerance Dialog Box

GstarCAD 2027 · Command Reference

Commands > T Command > TOLERANCE > Geometric Tolerence Dialog Box

Function Description:

The Geometric Tolerance dialog box is used to specify the symbols and values for a feature control frame.
After selecting geometry features symbols, the Geometric Tolerance dialog box closes and prompts to specify the location to place the feature control frame.

Dialog Box Options:

Symbol

Selects a geometric characteristic symbol from the Symbol dialog box.

Tolerance 1

Creates the first tolerance value in the feature control frame. The tolerance value means the amount by which the geometric features can deviate from a perfect form. Users can insert a diameter symbol.

• The first box: Clicks the first box to insert a symbol. For example, insert a diameter symbol.
• The second box: Creates a tolerance value. Enter a tolerance value to the second box.
• The third box: Displays the Material Condition dialog box, from which users can select a modifying symbol. These symbols act as modifiers to the geometric characteristic and the tolerance value of features that can vary in size.

Tolerance 2

Creates the second tolerance value in the feature control frame. Specify the second tolerance value in the same way as the first one.

Datum 1

Creates the primary datum reference value in the feature control frame. The datum reference is composed by a value and a modifying symbol. In theory, the datum is an accurate geometric reference, which is a tolerance zone used to create features.

• The first frame: Creates a datum reference value.
• The second frame: Displays the Material Condition dialog box, from which users can select a modifying symbol. These symbols act as modifiers to the datum reference.

Datum 2

Creates the secondary datum reference in the feature control frame, which is in the same way as the primary datum reference.

Datum 3

Creates the tertiary datum reference in the feature control frame, which is in the same way as the primary datum reference.

Height

Creates a projected tolerance zone value in the feature control frame. A projected tolerance zone controls the height variation of the extended portion in the fixed perpendicular part, as well the location tolerance controls the tolerance accurancy.

Projected Tolerance Zone

Inserts a projected tolerance zone symbol after the projected tolerance zone value.

Datum Identifier

Creates a datum-identifying symbol consisting of a reference letter. A datum is a theoretically exact geometric reference from which you can establish the location and tolerance zones of other features. A point, line, plane, cylinder, or other geometry can serve as a datum.

Other versions with matching text

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Article ID: 3460
Created: September 26, 2026
Last Updated: September 25, 2026
Author: kbadmin

Online URL: https://kb.gstarcad.com.my/article/geometric-tolerance-dialog-box-gstarcad-2027-3460.html