Join Scott Onstott for an in-depth discussion in this video Specifying lateral tolerances in dimension styles and objects, part of Working with Dimensions in AutoCAD.
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- In many engineering drawings you'll have their requirement to specify lateral tolerances. Tolerances allow a difference from the theoretical value. So, for example, in the case of this hole in the frame we have a radius that's given as 2.9cm. If we specify a lateral tolerance, that would give us a range of acceptable values, above or below that theoretical value.
We can create this tolerance, either in the Dimension Object itself, or in the DimensionStyle. Let's try it through the DimensionStyle. D, Enter. We've already developed Substyles for this project, so, if we want to specify the tolerance just for the radial dimension, we can do so by selecting the Substyle, and then click Modify. Go to the Tolerances tab, and open the Method dropdown.
Here you have four different methods you can use to specify lateral tolerance. Let's begin by trying the Symmetrical method. This will give us a plus or minus value. Let's set the upper value at 0.1cm. Okay, close. Now it says Radius 2.9 plus or minus 0.1. You can override that by selecting the object, and you can come down here and locate tolerances.
And here we have the ability to select the Method, which is called ToleranceDisplay, and we could choose another method. And actually you see a preview of that on-screen. There's Symmetrical, and Deviation allows you to specify the upper and lower limits independently. So let's say it would be acceptable if this was 0.12cm larger or 0.14 for the upper limit here and the lower limit.
And if we're going to specify tolerances with greater precision than our measurement, we better go up and alter the Measurement, so that it has some more precision. And we also need to increase the precision of the Tolerance itself to match that level. So now we have an upper and a lower bound on that measurement. You can also do that in another way by going to Limits.
Limits essentially takes the deviation values and calculates that. It took the 2.95 plus 0.14 and it gave us 3.09 for the upper limit. Basic just puts a box around the theoretical value to let you know that there is some kind of tolerance associated with it, but it remains unspecified. So there you have it, there are four different methods you can use to specify your lateral tolerances, and now you know how you can do that at the Object level at the Substyle level, or at the main DimensionStyle level.
- Creating different styles of dimensions: linear, baseline, etc.
- Editing dimension styles
- Specifying tolerance
- Re-associating dimensions
- Editing dimensions text
- Labeling with multileaders