For simplicity and clarity, CAD users draw buildings at full scale. For instance, when drawing a door in CAD, the door would be 3 feet wide and 7 feet tall. However, since these drawings get placed on sheets of paper that are much smaller, a scale factor is required so that the final drawing has a usable conversion factor.
If you choose "mm full size" that sets the combined scale factor to 25.4. This is the conversion factor from inches to millimeters. If you then change your feature scale multiplier to, say, 0.5, your combined scale factor becomes 12.7 -- half of 25.4. If your multiplier is set to .5 and you're using inches, your combined factor is 0.5 -- half of one inch.
This is a much more convenient location in the workflow for scaling. We plot on 11x17, and I like to bring my footprints in to fit. So I set my scaling there, when I insert my first footprint. ACADE remembers that setting each time I use the command (during that session). The reason this works for me is that I may be using different scaling factors on different sheets.
The combined scale factor value is simply information, as Jim explained. The Feature Scale Multiplier (FSM) differs from the Scale field on the Icon Menu because it scales symbols and features. For example, if you have your drawing properties set to use dots for wire tees, the software will insert the dots for you. This is a feature. The same is true for angled tee symbols, wire loop symbols, and the offset distance when you start a second wire from a component wire connection. The only thing that the scale field in the Icon Menu dialog controls is the scale of the symbols as you insert them. It has no affect on features that the software manages for you, thus the Feature Scale Multiplier is a better choice. However, I only use it for minor changes in scale - a gentle nudge up or down to fit my drawing environment. I try not to set it higher than 2 (double scale) or less than 0.5. (half scale).
I prefer to use the Modify Symbol Library utility and scale an entire library to fit my needs. For example, I make a copy of the IEC4 library folder. I name this copied folder IEC_03937. 0.03937 is the scale factor that will scale IEC symbols down to fit an inches drawing environment. I use the Modify Symbol Library utility to scale the symbols by 0.03937. I actually have a folder named IEC_024 because I found that a scale factor of 0.024 works well for a B-size drawing. Note: It takes approximately 2-4 hours to scale an entire library, depending upon the speed of your computer and whether or not the library is on a network drive. You should also check the progress periodically because there are a couple of pauses during the process and you will have to press spacebar to continue.
So, are you saying that if I reimport the data from the suvey database, since I now have a scale factor defined, it will apply that to the data upon reimport? I will test this out. Thanks for the help
So if you have a legacy file that was on your local system, and then went out and got a couple of points with GPS and have used the Transform Tab, to create Grid information all you need to do is export the point data with a new Point file format that reads the GRID Northing and Easting columns instead of the Northing and Easting column. You don't want to apply a scale factor to this data (level sea level off) as that factor is already taken into account for your existing data as it is on the ground, but your GPS points that your Transforming too need to be on GROUND (i.e. scale factor applied) so your field crew would need to have the scale factor applied in the field (data collector) or in the office, by applying it to the GPS points only. Once you have the Grid Data exported you can import that into the new file - or database (I'd keep the old data). and shift the drawing accordingly.
Weeding reduces the number of points generated along the contours. The weeding factors ignore both vertices that are closer together than the distance factor and vertices that deflect less than the angle factor. A larger distance and deflection angle weeds a greater number of points. The distance factor is measured in linear units, and the angle factor is measured in angular units. The weeding factors must be less than the supplementing factors.
The supplementing distance is the maximum distance between vertices. If the distance between vertices on a contour is greater than the supplementing factor, then points are added along the contour at equal intervals that are less than or equal to the supplementing distance. The smaller the distance, the greater the number of supplemented points.
The global scale factor affects the appearance of all the linetypes in the drawing. You can set the global scale factor by changing the LTSCALE system variable at the Command prompt or with the Linetype Manager. The default global scale factor is 1.0. The smaller the scale factor, the more repetitions and the smaller the spacing in each linetype pattern.
This article will help you gain an intuitive understanding of CAD scale factors and best practices for scaling design drawings. We will be using examples from AutoCAD, but the same steps can be similarly applied in most CAD software.
Despite these differences in notation, the rules governing all scaled drawing are the same. Computer Aided Design (CAD) makes it simple and effortless to move between scales and to produce drawings at multiple sizes with the help of CAD scale factors, provided you understand how to apply them.
This article will use common imperial architectural scales in its examples, but you should be encouraged to familiarize yourself with metric and engineering scales so that you can intuitively move between them with the help of CAD scale factors- an important skill for our increasingly interdisciplinary and globalized profession.
A scale factor is a ratio of change from a drawing to real life. Typically, a scale factor is unit-less; a scale factor of 48 (or 1:48) is saying that for one unit on the page, it represents 48 of the same units in real life.
Metric scales are represented directly as unit-less scale factors (such as 1:50) because the conversions between metric lengths are all factors of 10. A metric drawing will indicate its scale factor, and the unit it was drawn in.
Getting the hang of CAD scale factors can be a frustrating endeavor and doing them wrong can lead to some pretty embarrassing situations. When you are rescaling drawings, just remember: don't scale recklessly, and try to get a good understanding of what you intend to do. What are your units? Should your drawing get bigger or smaller? What is the current scale factor? If you can answer those questions, and follow the examples given in this article, you'll be a scaling master in no time.
For calculating the scale factor from an engineering drawing scale, only multiply the feet by 12. For an in-depth look at both engineering and architectural scales, check out this tutorial on CAD Scale Factors by ArchToolbox.
Pick or type SCALEBB or ROTATEBB to run the command. Select the objects to scale and now move your mouse to dynamically set the common scale factor or rotation angle for all selected objects. You can specify the scale factor (and then scale the objects) relatively to the reference point of each object (the measurement is performed on the first one, by default), or to their bounding box (least rectangle) - either center or lower-left point. The current mode and scale factor are displayed in the status line.
AutoCAD provides a SCALE command that can be useful when we want to scale a drawing by a constant factor. On some occasions, we may want to use a different factor for each axis. A typical example is when we have a model where the dimensions in the plan are in millimetres but the elevations are specified in metres, and we want to convert it to metres for all three axes.
DIMSTYLE is a command in AutoCAD that allows users to quickly and efficiently modify the properties of dimensions in a drawing. With DIMSTYLE, users can change the CAD scale factor of their dimension text height, arrowhead style, and extension line length, all using one setting.
First, select all the dimensions that need to be updated by selecting them with the cursor or using the CTRL+A command to select all dimensions in the drawing. Next, type in the command DIM UPDATE ALL in the command line and press Enter. This will prompt AutoCAD to update all selected dimensions with the current dimension style settings, including the CAD scale factor.
The CELTSCALE is relative to LTSCALE. By setting CELTSCALE to 0.5 the next line you draw will have a linetype scale factor which is half that of the lines drawn previously.
this is a great article and yet, after studying all the options for linetype scale, trying out all combinations of settings, I still get solid lines that are supposed to be dashed. it is annoying to say the least, I am starting to think my old ways of adjusting linetype scales in the property box is the best way to get what you want. I have drawings where I generate schematics through Stabicad, and some lines will show dashed as supposed to, while generating a schematic in the next drawing gives me solids, while every setting for each drawing is exactly the same. please work on the bugs within autocad instead of flinging a new version with added frustration onto us. I am busy working around problems as much as I am actually working. every update by either stabi or auto will give you some new challenges to overcome. it never really gets any easier. after a million versions you would expect an expensive product to work.
i have autocad 2015 student version and my line settings are @ by default that means when i enter co-ordinates for the next point i takes previous point as the base point instead of the (0,0) can you help me out. please
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