How to mark dimensions in cad

How to mark dimensions in CAD: analysis of popular topics on the Internet and practical tutorials

Recently, discussions about CAD (computer-aided design) have continued to rise across the Internet. Especially regarding the basic operation of dimensioning, both novices and experienced users have a lot of questions. This article will systematically explain the CAD dimensioning method based on hot topics in the past 10 days, and attach practical data comparisons.

1. Statistics of hot topics related to CAD across the entire network (last 10 days)

2. Basic steps of CAD dimensioning

1.linear annotation: Use the DIMLINEAR command (shortcut key DLI) to select two endpoints and then specify the dimension line position. Suitable for horizontal/vertical distance measurement.

2.Alignment dimensions: Use the DIMALIGNED command (shortcut key DAL) to measure the true length of the diagonal line, and the dimension line is parallel to the object.

3.Radius/Diameter Dimensions: Use the DIMRADIUS (DRA) or DIMDIAMETER (DDI) command to automatically identify arc objects.

3. Comparison of annotation functions of mainstream CAD software

4. Key points for labeling style setting

1.Text settings: The recommended height is 3.5mm (1:1 drawing), and the font is preferably gbenor.shx+gbcbig.shx combination.

2.Arrow style: Slanted arrows are often used in architectural drawings, and solid closed arrows are mostly used in mechanical drawings. The size is usually 2.5mm.

3.Precision control: It is recommended to set it to 0.00 for mechanical parts drawings and 0 for construction engineering drawings.

5. Solutions to high-frequency problems

Q: What should I do if the annotation text is not displayed?
A: Check whether the text height is 0, or the current layer is frozen

Q: Does the marked size not match the actual one?
A: Confirm whether the measurement scale factor (DIMLFAC) is set correctly

Q: How to modify annotations in batches?
A: Use property matching (MATCHPROP) or dimension style manager (DIMSTYLE)

6. Recommended advanced techniques

1. UseQDIM commandQuickly mark multiple consecutive dimensions
2. passDIMBREAKAdd annotations to interrupt and avoid intersections
3. UtilizeDIMSPACEAutomatically arrange parallel annotations at equal distances

According to statistics, mastering these annotation skills can improve drawing efficiency by more than 40%. It is recommended that users focus on practicing 2-3 core annotation methods based on their own industry needs and establish standardized style templates.