{"id":1749,"date":"2021-03-11T18:50:13","date_gmt":"2021-03-11T23:50:13","guid":{"rendered":"https:\/\/opentextbc.ca\/autocad2d\/chapter\/drawing-utilities\/"},"modified":"2021-11-03T16:46:52","modified_gmt":"2021-11-03T20:46:52","slug":"drawing-utilities","status":"publish","type":"chapter","link":"https:\/\/opentextbc.ca\/autocad2d\/chapter\/drawing-utilities\/","title":{"raw":"Module 34: Drawing Utilities","rendered":"Module 34: Drawing Utilities"},"content":{"raw":"
\n

Learning Outcomes<\/p>\n\n<\/header>\n

\n\nWhen you have completed this module, you will be able to:\n
    \n \t
  1. Explain drawing and file maintenance to help manage and control AutoCAD drawing files.<\/li>\n \t
  2. Describe a nested object.<\/li>\n \t
  3. Apply the TIME, PURGE, and RENAME commands.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

    Drawing Utilities<\/h1>\nIt is very important for you as the AutoCAD Operator to maintain your drawings and drawing files on a regular basis. It is very easy, while working day-to-day producing drawings, to let things slide and not correct small items in the drawings or the drawing files. If left unchecked, this habit can lead to a large problem in the future, sometimes almost impossible to correct.\n\nTake a few minutes, while working on each drawing, to maintain objects, layers, blocks, xref, names, and the different styles. For the drawing files, create an organized logical folder structure making more folders rather than less and dividing drawing files into smaller organized groups. Create a good naming system for the folders and drawings. Give them descriptive names that can be sorted alphabetically. Remove unwanted files, and keep your .bak files under control by deleted ones that are no longer required.\n\nAutoCAD has several utilities that are helpful to organize and maintain drawings. File Explorer can be used to maintain the drawing files. In this module, the PURGE and RENAME commands are covered to help you in your day-to-day drawing maintenance.\n

    Nested Objects<\/h2>\nA nested object <\/em><\/span>is a named object referencing another named object. One example of a nested object would be an object in a block located on layer Object but the block is on layer Block. The Object layer would appear not to have any objects on it, but in fact, an object in the block is on that layer and that makes it a nested object. Sometimes it is desirable to nest items to help draw and design more efficiently. An example of this is as follows: A drawing has several components. Draw each component separately and create a block of each. Assemble all the blocks and then make a block of the assembly. The blocks inserted in the assembly block are nested blocks. Nested objects are not necessarily a bad thing, but they can cause problem if they are not used correctly or carelessly inserted.\n\nAutoCAD does not allow a block to be created using a block that references itself. An example of this would be a block created using an object that contains a block with the same name. One the most common errors in block creation is creating a block selecting a block as one of the selected objects. Ensure that all drawing objects are exploded before creating a block using them.\n
    \n

    AutoCAD Command: TIME<\/p>\n\n<\/header>\n

    \n\nThe TIME command is used to display and track the amount of time that a drawing file is opened in AutoCAD.\n\nShortcut: none\n\n[caption id=\"attachment_1714\" align=\"aligncenter\" width=\"480\"]\"\" Tools Pull-down[\/caption]\n\n<\/div>\n<\/div>\n
    \n

    AutoCAD Command: PURGE<\/p>\n\n<\/header>\n

    \n\nThe PURGE command is used to remove block definitions, dimension styles, groups, layers, linetypes, text styles, zero-length geometry, and empty text objects.\n\nShortcut: PU<\/strong>\n\n[caption id=\"attachment_1715\" align=\"aligncenter\" width=\"511\"]\"\" File Pull-down[\/caption]\n\n<\/div>\n<\/div>\n
    \n

    AutoCAD Command: RENAME<\/p>\n\n<\/header>\n

    \n\nThe RENAME command is used to rename such things as block definitions, dimension styles, layers, linetypes, text styles, UCS's, viewports, and views.\n\nShortcut: REN<\/strong>\n\n[caption id=\"attachment_1716\" align=\"aligncenter\" width=\"211\"]\"\" Format Pull-down[\/caption]\n\n<\/div>\n<\/div>\n

    WORKALONG: Using the TIME, PURGE and RENAME Commands<\/h1>\n

    Step 1<\/h2>\nStart a new drawing using the template: 2D Layout English<\/span>.\n

    Step 2<\/h2>\nSave and name the drawing: AutoCAD 2D Workalong 34-1<\/span>.\n

    Step 3<\/h2>\nEnter the TIME command, as shown below.\n\nCommand: TIME<\/strong>\n\nCurrent time: Wednesday, March 01, 2016 11:49:30:937 AM\n\nTimes for this drawing:\n\nCreated: Wednesday, March 01, 2016 11:48:42:453 AM\n\nLast updated: Wednesday, March 01, 2016 11:48:42:453 AM\n\nTotal editing time: 0 days 00:12:48:672\n\nElapsed timer (on): 0 days 00:12:48:484\n\nNext automatic save in: 0 days 00:09:13:172\n\nEnter option [Display\/ON\/OFF\/Reset]:\n\nCommand:\n
    \n\nAUTHOR'S COMMENTS: <\/strong>Your answers will differ from this example.\n\n<\/div>\n

    Step 4<\/h2>\nEnter the PURGE command. It will open the Purge dialogue box. (Figure Step 4)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"388\"]\"\" Figure Step 4[\/caption]\n\n
    AUTHOR'S COMMENTS: <\/strong>You can only purge items from a drawing if they are NOT being used at the time. For example, an item that CAN be purged is a block that is defined but is not inserted in the drawing or a layer that was created but does not contain any objects. The items that can be purged will display with a + (plus sign) preceding them.<\/div>\n

    Step 5<\/h2>\nEnsure that the View items you can purge is enabled. (Figure Step 5)\n\nYou can only purge items from a drawing if they are NOT being used at the time. For example, an item that CAN be purged is a block that is defined but is not inserted in the drawing or a layer that was created but does not contain any objects. The items that can be purged will display with a + (plus sign) preceding them.\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"151\"]\"\" Figure Step 5[\/caption]\n

    Step 6<\/h2>\nExpand All items and then Blocks by clicking the + (plus sign) preceding each. When you see the - (minus sign), the item is expanded and will display all of the items that can be purged. All of the blocks in the Block Definition table that are NOT inserted in the drawing will display. (Figure Step 6)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"390\"]\"\" Figure Step 6[\/caption]\n\n
    AUTHOR'S COMMENTS: <\/strong>Your list may differ from this example.<\/div>\n

    Step 7<\/h2>\nSelect the item Blocks. Click the Purge All button. When asked to confirm the purging, click Purge all items. (Figure Step 7)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"392\"]\"\" Figure Step 7[\/caption]\n\n
    AUTHOR'S COMMENTS: <\/strong>After you complete the purge, note how the item Blocks no longer has a + (plus sign) proceeding it.<\/div>\n

    Step 8<\/h2>\nEnable the View items you cannot purge button. The items that you CANNOT purge will display in the Purge dialogue box. (Figure Step 8A and 8B)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"162\"]\"\" Figure Step 8A[\/caption]\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"389\"]\"\" Figure Step 8B[\/caption]\n

    Step 9<\/h2>\nClose the dialogue box. Enter the TIME command as shown below.\n\nCommand: TIME<\/strong>\n\nCurrent time: Wednesday, March 01, 2016 2:04:49:703 PM\n\nTimes for this drawing:\n\nCreated: Wednesday, March 01, 2016 1:21:07:562 PM\n\nLast updated: Wednesday, March 01, 2016 1:21:07:562 PM\n\nTotal editing time: 0 days 15:43:42:157\n\nElapsed timer (on): 0 days 15:43:42:141\n\nNext automatic save in: 0 days 00:07:33:123\n\nEnter option [Display\/ON\/OFF\/Reset]: R<\/strong>\n\n(Reset the timer to zero. This is an elapsed timer which allows you to time a special event while the total time the drawing is active is also being timed.)<\/em><\/span>\n\nEnter option [Display\/ON\/OFF\/Reset]: D<\/strong>\n\n(The Display option simply forces the command line to display the time values.)<\/em><\/span>\n\nCurrent time: Wednesday, March 01, 2016 2:05:08:312 PM\n\nTimes for this drawing:\n\nCreated: Wednesday, March 01, 2016 1:21:07:562 PM\n\nLast updated: Wednesday, March 01, 2016 1:21:07:562 PM\n\nTotal editing time: 0 days 00:44:00:766\n\nElapsed timer (on): 0 days 00:00:08:437 Next automatic save in: 0 days 00:07:33:123 Enter option [Display\/ON\/OFF\/Reset]:\n\nCommand:\n
    AUTHOR'S COMMENTS: <\/strong>Your answers will differ.<\/div>\n

    Step 10<\/h2>\nOn layer: 0, draw the three objects shown in the figure. Draw the circle 1 inch in diameter and the length of each side of the square and the diamond 1 inch. The location where you draw them is not important. (Figure Step 10)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"455\"]\"\" Figure Step 10[\/caption]\n

    Step 11<\/h2>\nCreate three blocks, one from each object, and name them: Circle<\/span>, Square<\/span>, and Diamond<\/span> respectfully. Delete the drawing objects when you create the block for each. After you have created all three blocks, your drawing should appear blank.\n

    Step 12<\/h2>\nCheck to ensure that the blocks were created by entering the INSERT command. In the list of names, you should only see the three blocks. (Figure Step 12)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"497\"]\"\" Figure Step 12[\/caption]\n

    Step 13<\/h2>\nEnter the RENAME command. It will open the Rename dialogue box. Select Blocks in the Named Objects column. The three blocks you created in Step 11 will display in the Items column. (Figure Step 13)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"420\"]\"\" Figure Step 13[\/caption]\n

    Step 14<\/h2>\nClick the block: Diamond<\/span> in the Items column. Note how it now appears in the Old Name: box. Enter the new block name: Rotated Square<\/span> in the Rename To: box. Click the Rename To: button to execute the name change. The renamed block will now appear in the Items box. (Figure Step 14A and 14B)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"386\"]\"\" Figure Step 14A[\/caption]\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"257\"]\"\" Figure Step 14B[\/caption]\n

    Step 15<\/h2>\nUsing the INSERT command, insert the blocks: Square<\/span> and Rotated Square<\/span>. The location where you insert them is not important. Your drawing should appear as shown in the figure. (Figure Step 15)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"325\"]\"\" Figure Step 15[\/caption]\n\n
    MUST KNOW:\u00a0<\/strong>The PURGE command removes unwanted items from the drawing. In some cases, it is the only way to remove them. If an item is being used in the drawing, it cannot be purged. For example, a layer with an object on it cannot be purged, nor can a block that has been inserted onto the drawing.<\/div>\n

    Step 16<\/h2>\nEnter the PURGE command. In the Purge dialogue box, enable View items you can purge. Expand the item Blocks and the Circle block should display as shown in the figure. (Figure Step 16)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"300\"]\"\" Figure Step 16[\/caption]\n\n
    \n

    Step 17<\/h2>\nUsing what you learned earlier in this workalong, purge the block: Circle<\/span> from the drawing.\n

    Step 18<\/h2>\nEnter the TIME command as shown below. Command: TIME<\/strong>\n\n<\/div>\nCurrenttime: Wednesday, March 01, 2016 2:30:21:015PM\n\nTimes for this drawing:\n\nCreated: Wednesday, March 01, 2016 1:21:07:562 PM\n\nLast updated: Wednesday, March 01, 2016 1:21:07:562 PM\n\nTotal editing time: 0 days 01:09:13:485\n\nElapsed timer (on): 0 days 00:25:21:156\n\nNext automatic save in: 0 days 00:02:58:672\n\nCommand:\n
    AUTHOR'S COMMENTS: <\/strong>Your answers will differ from this example.<\/div>\n

    Step 19<\/h2>\nFind the record the following answers in your drawing:\n\nA <\/strong>Total editing time in the drawing.\n\nB <\/strong>Time in Elapsed timer.\n

    Step 20<\/h2>\nSave and close the drawing.\n

    Drafting Lesson: Cross Sections - Part 2<\/h1>\n

    Types of Section Views<\/h2>\nThere are many types of section views that can be drawn. The full, half, aligned and revolved section, as shown in figures below, are the most common ones.\n

    Full Section<\/h2>\nA full section<\/span> <\/em>is the most commonly used cross section. It cuts completely through the object along the cutting plane. See Figure 35-1.\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"356\"]\"\" Figure 35-1
    Full Section[\/caption]\n

    Half Section<\/h2>\nThe half section <\/em><\/span>only cuts through half of the object. It is used to section a symmetrical object where both halves are identical. See Figure 35-2.\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"352\"]\"\" Figure 35-2
    Half Section[\/caption]\n

    Aligned Section<\/h2>\nAn aligned section <\/em><\/span>is used to align spokes along the cutting plane on a symmetrical object. Take note how the spokes are not on the cutting plane but are aligned in the section view. See Figure 35-3.\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"371\"]\"\" Figure 35-3
    Aligned Section[\/caption]\n

    Revolved Section<\/h2>\nA revolved section <\/em><\/span>is a simple way to show the shape of an object i.e. A spoke. Revolve the section on the object as shown in Figure 35-4.\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"342\"]\"\" Figure 35-4
    Revolved Section[\/caption]\n\n
    USER TIP: <\/strong>When entering names for drawings, blocks, layers, and other items it is important to name them so they are descriptive and can be found easily. Naming them so they group together or are easy to find in a search is important. They should also be unique to your company and can be listed in alphabetical order. Let's assume that you are a house designer and the name of your company is House Designer Ltd. For a naming scheme on layers in your drawings you might want to name all your layers starting with the letters HDL. Such as HDL Floor Plan, HDL Furniture, etc. Notice how they appear on the layer list, shown on the right, and how they are grouped together, easy to find and unique to your company. To name the drawings you create for your company. Use a naming scheme such as HDL House 0203, HDL House 3252, HDL House 2143 etc. On the left, is a partial list of how your drawing files would appear in Windows Explorer.\u00a0 \"\"\u00a0 \"\"<\/div>\n
    USER TIP:<\/strong> When an item you wish to purge from a drawing is listed in the items you cannot purge, click the item and Purge dialogue box will display tips why the item cannot be purged as you can see below. Using these tips, you can then figure out what changes would have to be made to the drawing before the items can be purged.\"\"\u00a0 \"\"<\/div>\n

    Key Principles<\/h1>\n
    \n

    Key Principles in Module 34<\/p>\n\n<\/header>\n

    \n
      \n \t
    1. The PURGE command removes unwanted items from the drawing. In some cases, it is the only way to remove them. If an item is being used, it cannot be purged.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

      Lab Exercise 34-1<\/h1>\nTime allowed: 60 minutes.\n\n\n\n\n
      Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
      AutoCAD 2D Lab 34-1<\/td>\n2D Layout Metric<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Step 1<\/h2>\nOn layers: Object<\/span> and Hidden<\/span>, draw the Front and Right Side view as shown in the figure. (Figure Step 1A and 1B)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"600\"]\"\" Figure Step 1A[\/caption]\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"417\"]\"\" Figure Step 1B
      Completed Drawing[\/caption]\n

      Step 2<\/h2>\nOn layers: Object<\/span> and Hatch<\/span>, draw a full section and a half section. Use hatching pattern: ANSI32<\/span>. Select an appropriate scale to match the figure the best that you can. (Figure Step 2A and 2B)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"319\"]\"\" Figure Step 2A
      Detail of Key[\/caption]\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"600\"]\"\" Figure Step 2B[\/caption]\n

      Hint 1<\/h2>\nTo help you visualize the object that you are drawing. (Figure Step 1A and 1B)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"250\"]\"\" Figure Hint 1A
      Solid Model[\/caption]\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"153\"]\"\" Figure Hint 1B
      Solid Model[\/caption]\n

      Lab Exercise 34-2<\/h1>\nTime allowed: 30 minutes.\n\n\n\n\n
      Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
      AutoCAD 2D Lab 34-2<\/td>\nN\/A<\/td>\nFeet\/Inches<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Step 1<\/h2>\nOpen the drawing: AutoCAD 2D Lab 33-1. (Figure Step 1)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 1[\/caption]\n

      Step 2<\/h2>\nUsing the SAVEAS command, save the drawing with the name: AutoCAD 2D Lab 34-2<\/span>.\n

      Step 3<\/h2>\nReset the elapsed timer to zero.\n

      Step 4<\/h2>\nDelete all existing blocks named: File Cabinet<\/span> that are on the drawing. (Figure Step 4)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"422\"]\"\" Figure Step 4[\/caption]\n

      Step 5<\/h2>\nPurge the block: File Cabinet from your drawing.\n

      Step 6<\/h2>\nRename the following blocks:\n\nA<\/strong> From: Desk<\/span> to 48X28 Desk<\/span>\n\nB<\/strong> From: Conference Table<\/span> to 10 Ft. Diameter Table<\/span>\n

      Step 7<\/h2>\nOn layer: 0, draw the plant shown in the figure. (Figure Step 7A and 7B)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"231\"]\"\" Figure Step 7A[\/caption]\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"360\"]\"\" Figure Step 7B[\/caption]\n\n
      AUTHOR'S COMMENTS: <\/strong>Draw a circle and one-quarter of the inside. Then array it. Draw it by eye, using lines.<\/div>\n

      Step 8<\/h2>\nRedefine the block in the drawing named: Plant with the plant you drew in Step 7. All existing plant blocks should change to the new plant block. (Figure Step 8)\n\n[caption id=\"attachment_1748\" align=\"aligncenter\" width=\"500\"]\"\" Figure Step 8[\/caption]\n

      Step 9<\/h2>\nUsing the elapsed timer, record the amount of time you took to do this lab exercise.\n

      Step 10<\/h2>\nSave and close the drawing.","rendered":"
      \n
      \n

      Learning Outcomes<\/p>\n<\/header>\n

      \n

      When you have completed this module, you will be able to:<\/p>\n

        \n
      1. Explain drawing and file maintenance to help manage and control AutoCAD drawing files.<\/li>\n
      2. Describe a nested object.<\/li>\n
      3. Apply the TIME, PURGE, and RENAME commands.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

        Drawing Utilities<\/h1>\n

        It is very important for you as the AutoCAD Operator to maintain your drawings and drawing files on a regular basis. It is very easy, while working day-to-day producing drawings, to let things slide and not correct small items in the drawings or the drawing files. If left unchecked, this habit can lead to a large problem in the future, sometimes almost impossible to correct.<\/p>\n

        Take a few minutes, while working on each drawing, to maintain objects, layers, blocks, xref, names, and the different styles. For the drawing files, create an organized logical folder structure making more folders rather than less and dividing drawing files into smaller organized groups. Create a good naming system for the folders and drawings. Give them descriptive names that can be sorted alphabetically. Remove unwanted files, and keep your .bak files under control by deleted ones that are no longer required.<\/p>\n

        AutoCAD has several utilities that are helpful to organize and maintain drawings. File Explorer can be used to maintain the drawing files. In this module, the PURGE and RENAME commands are covered to help you in your day-to-day drawing maintenance.<\/p>\n

        Nested Objects<\/h2>\n

        A nested object <\/em><\/span>is a named object referencing another named object. One example of a nested object would be an object in a block located on layer Object but the block is on layer Block. The Object layer would appear not to have any objects on it, but in fact, an object in the block is on that layer and that makes it a nested object. Sometimes it is desirable to nest items to help draw and design more efficiently. An example of this is as follows: A drawing has several components. Draw each component separately and create a block of each. Assemble all the blocks and then make a block of the assembly. The blocks inserted in the assembly block are nested blocks. Nested objects are not necessarily a bad thing, but they can cause problem if they are not used correctly or carelessly inserted.<\/p>\n

        AutoCAD does not allow a block to be created using a block that references itself. An example of this would be a block created using an object that contains a block with the same name. One the most common errors in block creation is creating a block selecting a block as one of the selected objects. Ensure that all drawing objects are exploded before creating a block using them.<\/p>\n

        \n
        \n

        AutoCAD Command: TIME<\/p>\n<\/header>\n

        \n

        The TIME command is used to display and track the amount of time that a drawing file is opened in AutoCAD.<\/p>\n

        Shortcut: none<\/p>\n

        \"\"
        Tools Pull-down<\/figcaption><\/figure>\n<\/div>\n<\/div>\n
        \n
        \n

        AutoCAD Command: PURGE<\/p>\n<\/header>\n

        \n

        The PURGE command is used to remove block definitions, dimension styles, groups, layers, linetypes, text styles, zero-length geometry, and empty text objects.<\/p>\n

        Shortcut: PU<\/strong><\/p>\n

        \"\"
        File Pull-down<\/figcaption><\/figure>\n<\/div>\n<\/div>\n
        \n
        \n

        AutoCAD Command: RENAME<\/p>\n<\/header>\n

        \n

        The RENAME command is used to rename such things as block definitions, dimension styles, layers, linetypes, text styles, UCS’s, viewports, and views.<\/p>\n

        Shortcut: REN<\/strong><\/p>\n

        \"\"
        Format Pull-down<\/figcaption><\/figure>\n<\/div>\n<\/div>\n

        WORKALONG: Using the TIME, PURGE and RENAME Commands<\/h1>\n

        Step 1<\/h2>\n

        Start a new drawing using the template: 2D Layout English<\/span>.<\/p>\n

        Step 2<\/h2>\n

        Save and name the drawing: AutoCAD 2D Workalong 34-1<\/span>.<\/p>\n

        Step 3<\/h2>\n

        Enter the TIME command, as shown below.<\/p>\n

        Command: TIME<\/strong><\/p>\n

        Current time: Wednesday, March 01, 2016 11:49:30:937 AM<\/p>\n

        Times for this drawing:<\/p>\n

        Created: Wednesday, March 01, 2016 11:48:42:453 AM<\/p>\n

        Last updated: Wednesday, March 01, 2016 11:48:42:453 AM<\/p>\n

        Total editing time: 0 days 00:12:48:672<\/p>\n

        Elapsed timer (on): 0 days 00:12:48:484<\/p>\n

        Next automatic save in: 0 days 00:09:13:172<\/p>\n

        Enter option [Display\/ON\/OFF\/Reset]:<\/p>\n

        Command:<\/p>\n

        \n

        AUTHOR’S COMMENTS: <\/strong>Your answers will differ from this example.<\/p>\n<\/div>\n

        Step 4<\/h2>\n

        Enter the PURGE command. It will open the Purge dialogue box. (Figure Step 4)<\/p>\n

        \"\"
        Figure Step 4<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>You can only purge items from a drawing if they are NOT being used at the time. For example, an item that CAN be purged is a block that is defined but is not inserted in the drawing or a layer that was created but does not contain any objects. The items that can be purged will display with a + (plus sign) preceding them.<\/div>\n

        Step 5<\/h2>\n

        Ensure that the View items you can purge is enabled. (Figure Step 5)<\/p>\n

        You can only purge items from a drawing if they are NOT being used at the time. For example, an item that CAN be purged is a block that is defined but is not inserted in the drawing or a layer that was created but does not contain any objects. The items that can be purged will display with a + (plus sign) preceding them.<\/p>\n

        \"\"
        Figure Step 5<\/figcaption><\/figure>\n

        Step 6<\/h2>\n

        Expand All items and then Blocks by clicking the + (plus sign) preceding each. When you see the – (minus sign), the item is expanded and will display all of the items that can be purged. All of the blocks in the Block Definition table that are NOT inserted in the drawing will display. (Figure Step 6)<\/p>\n

        \"\"
        Figure Step 6<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>Your list may differ from this example.<\/div>\n

        Step 7<\/h2>\n

        Select the item Blocks. Click the Purge All button. When asked to confirm the purging, click Purge all items. (Figure Step 7)<\/p>\n

        \"\"
        Figure Step 7<\/figcaption><\/figure>\n
        AUTHOR’S COMMENTS: <\/strong>After you complete the purge, note how the item Blocks no longer has a + (plus sign) proceeding it.<\/div>\n

        Step 8<\/h2>\n

        Enable the View items you cannot purge button. The items that you CANNOT purge will display in the Purge dialogue box. (Figure Step 8A and 8B)<\/p>\n

        \"\"
        Figure Step 8A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 8B<\/figcaption><\/figure>\n

        Step 9<\/h2>\n

        Close the dialogue box. Enter the TIME command as shown below.<\/p>\n

        Command: TIME<\/strong><\/p>\n

        Current time: Wednesday, March 01, 2016 2:04:49:703 PM<\/p>\n

        Times for this drawing:<\/p>\n

        Created: Wednesday, March 01, 2016 1:21:07:562 PM<\/p>\n

        Last updated: Wednesday, March 01, 2016 1:21:07:562 PM<\/p>\n

        Total editing time: 0 days 15:43:42:157<\/p>\n

        Elapsed timer (on): 0 days 15:43:42:141<\/p>\n

        Next automatic save in: 0 days 00:07:33:123<\/p>\n

        Enter option [Display\/ON\/OFF\/Reset]: R<\/strong><\/p>\n

        (Reset the timer to zero. This is an elapsed timer which allows you to time a special event while the total time the drawing is active is also being timed.)<\/em><\/span><\/p>\n

        Enter option [Display\/ON\/OFF\/Reset]: D<\/strong><\/p>\n

        (The Display option simply forces the command line to display the time values.)<\/em><\/span><\/p>\n

        Current time: Wednesday, March 01, 2016 2:05:08:312 PM<\/p>\n

        Times for this drawing:<\/p>\n

        Created: Wednesday, March 01, 2016 1:21:07:562 PM<\/p>\n

        Last updated: Wednesday, March 01, 2016 1:21:07:562 PM<\/p>\n

        Total editing time: 0 days 00:44:00:766<\/p>\n

        Elapsed timer (on): 0 days 00:00:08:437 Next automatic save in: 0 days 00:07:33:123 Enter option [Display\/ON\/OFF\/Reset]:<\/p>\n

        Command:<\/p>\n

        AUTHOR’S COMMENTS: <\/strong>Your answers will differ.<\/div>\n

        Step 10<\/h2>\n

        On layer: 0, draw the three objects shown in the figure. Draw the circle 1 inch in diameter and the length of each side of the square and the diamond 1 inch. The location where you draw them is not important. (Figure Step 10)<\/p>\n

        \"\"
        Figure Step 10<\/figcaption><\/figure>\n

        Step 11<\/h2>\n

        Create three blocks, one from each object, and name them: Circle<\/span>, Square<\/span>, and Diamond<\/span> respectfully. Delete the drawing objects when you create the block for each. After you have created all three blocks, your drawing should appear blank.<\/p>\n

        Step 12<\/h2>\n

        Check to ensure that the blocks were created by entering the INSERT command. In the list of names, you should only see the three blocks. (Figure Step 12)<\/p>\n

        \"\"
        Figure Step 12<\/figcaption><\/figure>\n

        Step 13<\/h2>\n

        Enter the RENAME command. It will open the Rename dialogue box. Select Blocks in the Named Objects column. The three blocks you created in Step 11 will display in the Items column. (Figure Step 13)<\/p>\n

        \"\"
        Figure Step 13<\/figcaption><\/figure>\n

        Step 14<\/h2>\n

        Click the block: Diamond<\/span> in the Items column. Note how it now appears in the Old Name: box. Enter the new block name: Rotated Square<\/span> in the Rename To: box. Click the Rename To: button to execute the name change. The renamed block will now appear in the Items box. (Figure Step 14A and 14B)<\/p>\n

        \"\"
        Figure Step 14A<\/figcaption><\/figure>\n
        \"\"
        Figure Step 14B<\/figcaption><\/figure>\n

        Step 15<\/h2>\n

        Using the INSERT command, insert the blocks: Square<\/span> and Rotated Square<\/span>. The location where you insert them is not important. Your drawing should appear as shown in the figure. (Figure Step 15)<\/p>\n

        \"\"
        Figure Step 15<\/figcaption><\/figure>\n
        MUST KNOW:\u00a0<\/strong>The PURGE command removes unwanted items from the drawing. In some cases, it is the only way to remove them. If an item is being used in the drawing, it cannot be purged. For example, a layer with an object on it cannot be purged, nor can a block that has been inserted onto the drawing.<\/div>\n

        Step 16<\/h2>\n

        Enter the PURGE command. In the Purge dialogue box, enable View items you can purge. Expand the item Blocks and the Circle block should display as shown in the figure. (Figure Step 16)<\/p>\n

        \"\"
        Figure Step 16<\/figcaption><\/figure>\n
        \n

        Step 17<\/h2>\n

        Using what you learned earlier in this workalong, purge the block: Circle<\/span> from the drawing.<\/p>\n

        Step 18<\/h2>\n

        Enter the TIME command as shown below. Command: TIME<\/strong><\/p>\n<\/div>\n

        Currenttime: Wednesday, March 01, 2016 2:30:21:015PM<\/p>\n

        Times for this drawing:<\/p>\n

        Created: Wednesday, March 01, 2016 1:21:07:562 PM<\/p>\n

        Last updated: Wednesday, March 01, 2016 1:21:07:562 PM<\/p>\n

        Total editing time: 0 days 01:09:13:485<\/p>\n

        Elapsed timer (on): 0 days 00:25:21:156<\/p>\n

        Next automatic save in: 0 days 00:02:58:672<\/p>\n

        Command:<\/p>\n

        AUTHOR’S COMMENTS: <\/strong>Your answers will differ from this example.<\/div>\n

        Step 19<\/h2>\n

        Find the record the following answers in your drawing:<\/p>\n

        A <\/strong>Total editing time in the drawing.<\/p>\n

        B <\/strong>Time in Elapsed timer.<\/p>\n

        Step 20<\/h2>\n

        Save and close the drawing.<\/p>\n

        Drafting Lesson: Cross Sections – Part 2<\/h1>\n

        Types of Section Views<\/h2>\n

        There are many types of section views that can be drawn. The full, half, aligned and revolved section, as shown in figures below, are the most common ones.<\/p>\n

        Full Section<\/h2>\n

        A full section<\/span> <\/em>is the most commonly used cross section. It cuts completely through the object along the cutting plane. See Figure 35-1.<\/p>\n

        \"\"
        Figure 35-1
        Full Section<\/figcaption><\/figure>\n

        Half Section<\/h2>\n

        The half section <\/em><\/span>only cuts through half of the object. It is used to section a symmetrical object where both halves are identical. See Figure 35-2.<\/p>\n

        \"\"
        Figure 35-2
        Half Section<\/figcaption><\/figure>\n

        Aligned Section<\/h2>\n

        An aligned section <\/em><\/span>is used to align spokes along the cutting plane on a symmetrical object. Take note how the spokes are not on the cutting plane but are aligned in the section view. See Figure 35-3.<\/p>\n

        \"\"
        Figure 35-3
        Aligned Section<\/figcaption><\/figure>\n

        Revolved Section<\/h2>\n

        A revolved section <\/em><\/span>is a simple way to show the shape of an object i.e. A spoke. Revolve the section on the object as shown in Figure 35-4.<\/p>\n

        \"\"
        Figure 35-4
        Revolved Section<\/figcaption><\/figure>\n
        USER TIP: <\/strong>When entering names for drawings, blocks, layers, and other items it is important to name them so they are descriptive and can be found easily. Naming them so they group together or are easy to find in a search is important. They should also be unique to your company and can be listed in alphabetical order. Let’s assume that you are a house designer and the name of your company is House Designer Ltd. For a naming scheme on layers in your drawings you might want to name all your layers starting with the letters HDL. Such as HDL Floor Plan, HDL Furniture, etc. Notice how they appear on the layer list, shown on the right, and how they are grouped together, easy to find and unique to your company. To name the drawings you create for your company. Use a naming scheme such as HDL House 0203, HDL House 3252, HDL House 2143 etc. On the left, is a partial list of how your drawing files would appear in Windows Explorer.\u00a0 \"\"\u00a0 \"\"<\/div>\n
        USER TIP:<\/strong> When an item you wish to purge from a drawing is listed in the items you cannot purge, click the item and Purge dialogue box will display tips why the item cannot be purged as you can see below. Using these tips, you can then figure out what changes would have to be made to the drawing before the items can be purged.\"\"\u00a0 \"\"<\/div>\n

        Key Principles<\/h1>\n
        \n
        \n

        Key Principles in Module 34<\/p>\n<\/header>\n

        \n
          \n
        1. The PURGE command removes unwanted items from the drawing. In some cases, it is the only way to remove them. If an item is being used, it cannot be purged.<\/li>\n<\/ol>\n<\/div>\n<\/div>\n

          Lab Exercise 34-1<\/h1>\n

          Time allowed: 60 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 2D Lab 34-1<\/td>\n2D Layout Metric<\/td>\nMillimeters<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          On layers: Object<\/span> and Hidden<\/span>, draw the Front and Right Side view as shown in the figure. (Figure Step 1A and 1B)<\/p>\n

          \"\"
          Figure Step 1A<\/figcaption><\/figure>\n
          \"\"
          Figure Step 1B
          Completed Drawing<\/figcaption><\/figure>\n

          Step 2<\/h2>\n

          On layers: Object<\/span> and Hatch<\/span>, draw a full section and a half section. Use hatching pattern: ANSI32<\/span>. Select an appropriate scale to match the figure the best that you can. (Figure Step 2A and 2B)<\/p>\n

          \"\"
          Figure Step 2A
          Detail of Key<\/figcaption><\/figure>\n
          \"\"
          Figure Step 2B<\/figcaption><\/figure>\n

          Hint 1<\/h2>\n

          To help you visualize the object that you are drawing. (Figure Step 1A and 1B)<\/p>\n

          \"\"
          Figure Hint 1A
          Solid Model<\/figcaption><\/figure>\n
          \"\"
          Figure Hint 1B
          Solid Model<\/figcaption><\/figure>\n

          Lab Exercise 34-2<\/h1>\n

          Time allowed: 30 minutes.<\/p>\n\n\n\n\n
          Drawing Name<\/th>\nTemplate<\/th>\nUnits<\/th>\n<\/tr>\n
          AutoCAD 2D Lab 34-2<\/td>\nN\/A<\/td>\nFeet\/Inches<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          Step 1<\/h2>\n

          Open the drawing: AutoCAD 2D Lab 33-1. (Figure Step 1)<\/p>\n

          \"\"
          Figure Step 1<\/figcaption><\/figure>\n

          Step 2<\/h2>\n

          Using the SAVEAS command, save the drawing with the name: AutoCAD 2D Lab 34-2<\/span>.<\/p>\n

          Step 3<\/h2>\n

          Reset the elapsed timer to zero.<\/p>\n

          Step 4<\/h2>\n

          Delete all existing blocks named: File Cabinet<\/span> that are on the drawing. (Figure Step 4)<\/p>\n

          \"\"
          Figure Step 4<\/figcaption><\/figure>\n

          Step 5<\/h2>\n

          Purge the block: File Cabinet from your drawing.<\/p>\n

          Step 6<\/h2>\n

          Rename the following blocks:<\/p>\n

          A<\/strong> From: Desk<\/span> to 48X28 Desk<\/span><\/p>\n

          B<\/strong> From: Conference Table<\/span> to 10 Ft. Diameter Table<\/span><\/p>\n

          Step 7<\/h2>\n

          On layer: 0, draw the plant shown in the figure. (Figure Step 7A and 7B)<\/p>\n

          \"\"
          Figure Step 7A<\/figcaption><\/figure>\n
          \"\"
          Figure Step 7B<\/figcaption><\/figure>\n
          AUTHOR’S COMMENTS: <\/strong>Draw a circle and one-quarter of the inside. Then array it. Draw it by eye, using lines.<\/div>\n

          Step 8<\/h2>\n

          Redefine the block in the drawing named: Plant with the plant you drew in Step 7. All existing plant blocks should change to the new plant block. (Figure Step 8)<\/p>\n

          \"\"
          Figure Step 8<\/figcaption><\/figure>\n

          Step 9<\/h2>\n

          Using the elapsed timer, record the amount of time you took to do this lab exercise.<\/p>\n

          Step 10<\/h2>\n

          Save and close the drawing.<\/p>\n","protected":false},"author":90,"menu_order":3,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-1749","chapter","type-chapter","status-publish","hentry"],"part":1577,"_links":{"self":[{"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/pressbooks\/v2\/chapters\/1749","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/wp\/v2\/users\/90"}],"version-history":[{"count":1,"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/pressbooks\/v2\/chapters\/1749\/revisions"}],"predecessor-version":[{"id":1750,"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/pressbooks\/v2\/chapters\/1749\/revisions\/1750"}],"part":[{"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/pressbooks\/v2\/parts\/1577"}],"metadata":[{"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/pressbooks\/v2\/chapters\/1749\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/wp\/v2\/media?parent=1749"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/pressbooks\/v2\/chapter-type?post=1749"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/wp\/v2\/contributor?post=1749"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/opentextbc.ca\/autocad2d\/wp-json\/wp\/v2\/license?post=1749"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}