【 Weak current College 】 CAD drawing skills inventory (1)

Drawing

Q: what do you want to start drawing?

A: MO to not to miss the cut firewood. Computer drawing with hand-paint, to do the necessary preparations. If set layer, line type, callout styles, target acquisition, unit format, graphic borders, etc. Many of the repetitive work you can template diagrams as well in advance, ACAD.DWT starts a new figure to be used.

Q: what proportion in the AutoCAD drawing?

A: it is best to use the 1: 1 ratio, the ratio can freely adjust the output. Drawing scale and output ratio is two concepts, the output is "output 1 unit = drawing 500 units" is to press the 1/500 proportional output, if the "output 10 units = drawing 1 unit" is magnified 10 times the output. With 1: 1 scale drawing many advantages. First, easy to find mistakes, because according to the actual size of the drawing, it is easy to discover the size settings are not reasonable. Second, the dimension is very convenient, size number is, the software itself, should draw the wrong measurement, a look at the size digital discovered (of course, the software will also be able to set the dimension ratios, but always more work). Thirdly, in various local graphics between replication or use the block, the result is 1: 1 ratio adjustment block size and convenience. Fourth, by parts diagram spell Assembly or by the Assembly to remove picture parts diagram is very convenient. Fifth, there's no need for cumbersome downscaling and enlarge, improve work efficiency, prevent conversion process error may occur.

Q: what is a layer?

A: the rational use of layers, you can do more with less. Start Paint, you advance to set some basic layer. Each layer has its own specific purpose, the benefit is simply draw a graphic file, you can combine the many needs of drawings, you need to modify the time, it can also make for a layer.

Q: command alias is going on?

A: to facilitate the entry of commands, save memory full name in English, you can use a command alias (ALIAS) in place of the command. If the input C is equivalent to enter the CIRCLE command, L corresponds to LINE command. Command aliases can greatly speed up the order of the input speed and improve the efficiency of the drawing. Veteran are generally left on command, right hand click of a mouse.

Command aliases in ACAD.PGP file settings, use any text editor to edit the file. AutoCAD provides tools to modify the command aliases to dialog ALIASEDIT way interactive editing aliases.

Q: before drawing, drawing boundaries (LIMITS) must be located?

A: painting new figure best according to GB maps set map territories. Graphics is like drawing format boundaries, drawing on the industry at a glance. The figure drawn diagram printing industry is very convenient, automatic batch plot. Of course, it was used in a graphic file draw many pictures, this set map territories do not have much meaning.

Q: dimensioning, the graphics in the occasional small white spots, but unable to remove it, and why?

A: AutoCAD dimensioning, automatically generate a DEFPOINTS layer, save where the callout points and other information, it generally is frozen. For some reason, these points are sometimes displayed. To remove the first layer will be DEFPOINTS before removing after thawing. But be aware that if you delete a dimension is associated to the point, will also delete the corresponding dimension.

Q: used R12 full screen cross cursor, the cursor is small R14, what should I do?

A: you can click on the menu Tools\preferences\pointdevice, the percentage of the cursor is set to 100% (default 5%). You can also directly on the command line to modify the CURSORSIZE system variable.

Q: objective capture (OSNAP) useful?

A: the usefulness. In particular, drawing precision high mechanical drawings, objective capture is the best tool for precision fixed-point. Autodesk also attaches to each version upgrade, target capture functionality has greatly improved. Do not use the cursor line directly targeted, such points may not be accurate.

Q: why draw a hatching or dimension lines are not continuous line?

A: the AutoCAD drawing of hatching, dimension can have a style attribute. If the current line style is not a continuous line type, and then draw the hatching and dimension would not be a continuous line.

To edit

Q: how to use the "order of R12" key?

A: R14 default "order cancelled" key "ESC" key, if you're already accustomed to R12 "Ctrl + C", you can click on the menu Tools\preferences\compatibility\priorityforacceleratorkeys\AutoCADclassic, then you can use the "Ctrl + C" to cancel the order, while the "ESC" key is still valid.

Q: how to cut off many at a time line?

A: the TRIM command prompts you to select the graphic you want to cut, does not support common window and select a style. crossing When you want to cut the number of line segments, to select multiple times to complete. Then you can use the Select method. fence When the trim command prompts to select the graphic you want to cut off, enter "f", and then draw on the screen a dashed line, carriage return, and the dashed line intersects the graphics have been cut off.

Similar to EXTEND command, the selectobject: prompt enter F, can an extension multiple entities.

Q: Why delete lines out again?

A: the most likely to be several lines coincide together. For novice, this is a very common problem.

In addition, when a centerline or dotted lines in any case change line ratio or as a continuous line (REGEN), most of it is for this reason.

Q: how to quickly transform layer?

A: click the "ObjectPropertys (object properties)," toolbar "Makeobjects ' layercurrent" button (tool bar on the far left of the button), and then select the drawing area to go to the layer of any graphics, current layer immediately transform into a selected shape's layer.

Q: how to deal with hand-drawn artwork, especially many past engineering drawing freehand?

A: the drawings scanned into the computer might be a way. But note that AutoCAD graphics processing is vector graphics, and scanned drawings formation is bit map, both of different nature makes it while you can put the scan drawings resulting graphic file is inserted into the AutoCAD, but you can only view and not edit. There are also some vector tools, you can convert the bitmap to vector graphics but limited to the technical level, the conversion efficiency and results are not satisfactory. I tried several such tools, disappointing results. (There is a handle that, it is better to draw it again)

Save

Q: How do I reduce the file size?

A: after the finalization of the graphics, cleanup (PURGE) command, clean out unwanted data, such as unused blocks, no entity layer, unused styles, font, size, style, etc., can effectively reduce the file size. General cleaning needs thoroughly PURGE two to three times.

In addition, by default, the file is in the R14 append mode, so that more faster. If you need to free up disk space, you must set the ISAVEPERCENT system variable to 0 to turn off the progressive saving characteristics, so that when the second file, the file size is reduced.

Q: How do I set up Auto-Save function?

A: the variable SAVETIME set to a lower value such as 10 minutes. AutoCAD default save time for 120 minutes.

Q: How do I restore the automatically saved graphs?

A: the AutoCAD graphic is automatically saved to AUTO.SV $ or AUTO?. SV $ file, locate the file to be renamed the graphics file to open in AutoCAD.

Usually this file is stored in the WINDOWS temporary directory, e.g. C:\WINDOWS\TEMP.

Q: mistakenly save cover image, how to recover data?

Answer: If you save only once, in a timely manner will suffix BAK file of the same name as a suffix in AutoCAD DWG, and then open it. If you saved multiple times, the original figure cannot be restored.

Q: why does prompt appears in the command line instead of a pop-up Open or Export dialog?

A: the FILEDIA AutoCAD system variable to control the display of the file list dialog box, set the FILEDIA to 1 will make the dialog box is displayed, if the FILEDIA is set to 0, by entering a symbol "~" to respond to your selected command in the first question, you can still get a dialog box appears. Of course, from a batch command or AutoLISP/ADSRX/ObjectARX application calls a file operation commands, you need the command line prompt, instead of a dialog box appears.

Q: why is when a picture is saved when the file browser on the file's date and time cannot be refreshed?

A: Autodesk have discovered the problem, it only appears on Win95B operating system, under Win95A or WindowsNT environment never happened. As a makeshift, you can set a system variable AutoCADR14 ISAVEPERCENT is 0, the AutoCAD when each filed are rewriting the entire drawing content, which may save some time, but I can guarantee that the file date is correct.

Font

Question: Why can't display Chinese characters? or entered characters into a question mark?

A: the reasons might be:

1. the corresponding glyphs are not using kanji font, such as HZTXT.SHX, etc.;

2. the current system does not have a Chinese font shape files; should be used to shape files to AutoCAD font directory (normally less than 6. ..\FONTS\);

3. for certain symbols, Greek letters, etc., you must use the corresponding font shape files, or into?.

Q: How do I resolve open in R14 R12 file appears garbled characters?

A: use R14 R12 file open, even if the proper selection of a file, or Chinese characters will appear garbled characters, as the R14 and R12 DWGPAGECODE different code pages. You can download the Autodesk master code page conversion tool wnewcp. Run wnewcp, first select the "R11/R12" check box, and then click the "Browse" button, choose to convert a file or directory, and then select the new code page (ANSI), click "start conversion" StartConversion. After conversion, the R14 was able to display Chinese characters correctly.

Days are supplied code goSwap tool DWGCODE.EXE also for code conversion.

Without these tools, you can open the R12 environment to convert graphic files, enter the COMMAND State DWGCODEPAGE, modify the value after you save the file as ASCII.

Bulk modify to use SCR command group of files or programming with LISP.

Q: why is the input of text height cannot be changed?

A: use the font height value is not 0, the text with DTEXT command write are not prompted to enter the height, so write the text height is unchanged, including the use of the font for the dimensioning of.

Q: How do I change the font format already exists?

A: If you want to change the existing text size, font, spacing, height, tilt, the insertion point, it is best to use the "characteristics (DDMODIFY)" command (if you have already defined a lot of text format). Click on "Properties", click on the text you want to modify, carriage return, a "change text" window, select the project you want to modify to modify.

Q: can use the system font, such as Arial, italics, etc?

A: Although ACADR14 can use the * character font .TTF file, but the font is too expensive CPU time, slightly lower for grades, shows the speed of the computer (such as the use of real-time Zoom command) is too slow. Recommended grades of low computer or use * .shx files. .Shx files in Chinese characters *, recommended daheng or greatstar company ACADR12 matching HZ * .shx font file, but in different machines do not have the appropriate fonts can cause Chinese character display problems. Of course, as in the interests of a small amount of use the system attractive fonts also fine.

Menu

Q: why is the toolbar button icon replaced by some smiley?

A: when AutoCAD cannot find the path to a bitmap file button, the tool bar or the tool box in the button icon will be replaced by a smiling face. This may occur in the toolbar is user-based, menu template file (MNU) has been edited by hand.

In this case, you can use a text editor to open the menu source file (MNS) and menu template file (MNU), copy from MNS customization tool bar section, paste the MNU file, and then rename or delete the old MNS, MNC and MNR file, and then use the mount command MENU/MENULOAD MNU file, AutoCAD will recompile the menu file, generate new MNS, MNC and MNR file, this will solve the problem.

In addition, if a bitmap file is not in the AutoCAD support path, this problem may also occur. Make sure that in "Preferences (System Configuration)" dialog support path already includes the bitmap files in a directory. For example, if you are from one user in sidebar moves one button to AutoCAD standards menu of a toolbar, you must edit the button file for the bitmap file is saved in an unsupported paths. You can follow the steps below to do:

1. move or copy the icon to a different menu tool bar, keep the tool bar dialog box remains open, right-click the icon to edit it.

2. in the button Properties dialog box, select the "Edit" button.

3. in the button Editor dialog box, select the button, specify the Saveas in AutoCAD supported bitmap files in the path of the directory.

4. close the button Editor, and then in the button Properties dialog box, select the Apply button, and finally close AutoCAD, and then restart it.

Q: How do I change the menu?

Answer: in WIN95/98, editor such as WordPad will support directory acad.mnu files [] in the English command names changed to Chinese, save and exit. Then enter the R14 "menu" command to load the menu file, acad.mnu dropdown menu becomes Chinese.

If you have already finished the menu file can be used directly.