Understanding Arc Dimensioning in MicroStation
MicroStation provides several tools for accurately dimensioning arcs and ensuring precise drawing interpretations. The following steps will guide you through the process of dimensioning an arc or arc segment effectively.
Step-by-Step Guide to Dimensioning an Arc
1. Access the Dimensioning Tool
Start by navigating to the “Annotate” tab within the application interface. From there, locate the “Dimensions” panel. This panel contains various tools tailored for drafting dimension lines.
2. Select the Arc Dimension Tool
Within the Dimensions panel, find and click on the option that allows you to create arc dimensions. Often labeled as “Arc Length,” this tool is essential for measuring and displaying the length of arcs accurately.
3. Identify the Arc or Segment
Position your cursor over the arc or the arc segment within the polyline you wish to dimension. Ensure that your cursor is accurately detecting the arc to provide precise measurements.
4. Input Arc Length Command
When prompted, type in the letter ‘L’ to signify that you wish to measure the arc length. This input informs MicroStation that you are focusing on measuring the length rather than any other dimensional aspect.
5. Select the Arc
With the ‘L’ command activated, click directly on the arc or arc segment that you want to measure. This selection confirms the entity you wish to dimension.
6. Positioning the Dimension Line
After selecting the corresponding arc, you will need to place the dimension line. Click at the desired location where you want the dimension display to appear. Review the positioning to ensure it does not interfere with other elements in your drawing.
7. Final Adjustments
If necessary, you can further adjust the properties of your dimensioning line. Use the properties toolbox to modify visibility, text size, or style according to your project’s requirements.
Changing Arc Length or Angles
To alter the arc length or angles in MicroStation, follow these streamlined steps:
1. Open the “Settings” menu and navigate to “Design File.”
2. Under “Working Units,” set the accuracy to the desired level.
3. To change the angle formatting, find the “Angle Readout” section and switch it to radians if needed.
4. Use the selection tool to click on your specified arc.
5. Lock in the dimensions by pressing ‘d’ to keep the radius consistent.
6. Use the tab key to navigate through available fields to adjust length or angle as required.
Rules to Follow When Dimensioning
Implementing proper dimensioning conventions is vital for clarity. Here are key guidelines:
– Maintain uniform spacing between dimension lines throughout your drawings, ensuring at least 3/8 inch distance from the object.
– Avoid having dimension lines overlap with other lines in the drawing for enhanced readability.
– Dimension lines should never cross each other, as this can lead to confusion when interpreting the measurements.
Frequently Asked Questions
1. Can I change the dimension style after creating dimensions?
Yes, you can modify the dimension style. Access the Dimension Styles menu, select the style you wish to adjust, and navigate to the Advanced tab. Make your changes and save to apply.
2. What if my arc doesn’t display the correct length?
Ensure that you have selected the correct arc tool and input the proper commands. Double-check your settings for accuracy levels and ensure your units are appropriate for the drawing.
3. How do I measure existing dimensions in my drawing?
To measure existing dimensions, use the Analyze tab and select appropriate measure tools, such as Measure Length or Measure Area, to gather the necessary information about your drawn elements.
