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AUTOCAD TIPS and GD&T TOOLS


The Status Bar (Bottom Right Graphic Toolbar):

Autocad Right Bottom Tool Graphic Tool bar

COMMANDS FOR GEOMETRIC TOLERANCES


Tolerance Command: Feature control frames can be created with leader lines using (TOL) TOLERANCE, (LEAD) LEADER, or QLEADER.

DIMSTYLE: Tolerance Tab (Dimension Style Command) —» to Set Current - New - Modify - Override and Compare.

Allign & Suppress Zeros in Tol Values —» Home —» Annotation panel —» Dimension Style —» select the style to change —» click Modify —» in Modify Dimension Style dialog box —» Tolerances tab —» Tolerance Format —» select the allignment from Vertical Position list —» in Zero Suppression —» select Leading to suppress leading zeros —» select Trailing to suppress trailing zeros —» OK —» Close to exit.

Creates Geometric Tolerances: TOL or Annotate —» select Dimension down arrow —» select Tolerance.

Tolerance Text Font: The suggested text font is romans.shx. These practices correspond with the ASME Y14.2M standard, line conventions and lettering.

Attaching Feature Control Frame to Leaders: The QLEADER command automatically attached and associated with a leader. This is the mosT effective technique for creating a feature control frame and other GD&D symbols, such as datum feature symbols.

GD&T Feature Frame

COMMANDS & SHORTCUTS & TIPS


Adding Fillets: Fillet —» Fillet / FIL —» type R —» Enter —» specify the radius (.xx) —» Enter —» select the first object —» select the second object —» RMC —» Repeat Fillet —» select the first object —» select the second object —» RMC to Cancel (cancel the command).

Adding Flag Notes: Create a symbol (a triangle) —» Create a text in the symbol —» Block —» Block Definition (Name + Select Objects + Pick Point) —» OK

Array Command: F9 (Snap Off) —» AR or Modify tab —» Array —» select objects —» Right-click —» array type: Rectangular / PAth / POlar Array —» select Grip (arrow) to edit array (click on screen to enter) —» COL —» Enter (Column spacing distance) —» R —» Enter number of Row —» Right-click —» Enter.

Center Mark: Annotate —» Dimension tab —» select Center Mark —» select a circle or an arc (continue selecting circles/arcs to place center marks —» Enter.

Drawing a Circle: Circle —» Circle / C —» Enter —» (select a center point in the drawing area) —» specify the diameter —» Enter.

Drawing a Polygon: Polygon / Pol —» Enter —» (enter number of side) —» (turn on object snaps = F3) select the center of polygon —» RMC —» Enter (to accept Default = Inscribed in cirle) or select Inscribed in cirle or Circumsribed about circle —» specify radius of the circle —» Enter. The Circumscribed option draws a polygon whose sides are tangent to the circumference (đường tròn, chu vi) of the circle.

Drawing a Rectangular: Draw —» Rectangle / RECT —» F12 Tooltip On/Off (click in the drawing area) —» type X dim, Y dim (Dynamic Input button is on for this step. If it’s not, AutoCAD treats an input of 36,36 as absolute coordinates) —» Enter.

Dynamic Input Tooltip —» F12 Tooltip On/Off — DSETTINGS —» Dynamic Input —» check Enable Pointer Input (select Settings for options) + Enable Dimension Input where possible (select Show 2 dimension input fields at a time) + Show command prompting and command input near the crosshairs + Show additional tips with command prompting (select Drafting Tooltip Appearance for options) —» OK.

Fillet a Rectangular: Fillet —» Fillet / FIL —» type R —» specify the radius (.xx) —» Enter —» select Polyline / P —» select the rectangle —» RMC to Cancel or Esc.

Hatch: Turn off Snap / F9 —» Ortho / F8 —» Object Snap / F3 —» Create a Hatch Layer and Set current—» H or Draw tab —» Hatch —» Select objects —» Properties —» select ANSI31 —» Scale = 1.0 (or type in a number to change) —» Angle (type in a number to change) —» Right-click —» Enter.

Modify Dimension Style: Lines, Symbols and Arrows, Text, Fit, Primary Units, Alternate Units, Tolerances —» Dimsty or select a Feature + Enter.

Navigation Bar —» NAVBAR (On/Off) — System Variable —» NAVBARDISPLAY (On/Off).

Offset an Object: Modify —» Offset / O —» specify offset distance —» Enter —» select the original object —» click where to offset —» RMC to Cancel.

Printing / Ploting: Paper space layouts is for creating arrangements of the drawing to be plot, these arrangements usually include a title block. PLO / Ctrl + P or Print Icon —» Printer/ploter (select a printer) —» Paper size (select the paper size) —» Plot area (select Limits: This is the entire drawing area specified with the drawing set up) —» Plot offset (select the Center the Plot check box) —» Plot scale (deselect the Fit to Paper check box and choose 1:10 – Scale used to setup the drawing) —» Plot Style Table (choose monochrome.ctb) —» Yes —» drawing orientation (Lanscape / Portrait) —» Preview —» x (close) —» OK (to print).

Setting up Layers: Layer Properties —» LA —» New Layer —» Name = Column —» color = 5 (blue) —» New Layer —» Name = Part Feature (ex: Base, Holes) —» color = 4 (cyan) —» New Layer —» Name = Dim —» color = 7 (black) —» select Part —» RMC —» set Current —» OK

Stretch Command: To stretch or move objects. The key to using STRETCH is specifying a crossing selection box properly. S or Modify tab —» Enter —» select objects (by crossing-window or crossing polygon) —» Right-click —» select a base point —» F8 / Ortho On —» enter the distance to stretch —» Enter.


TEXT, SYMBOLS & SPECIAL CHARACTERS


Unicode Strings and Control Codes.

Name Control Codes Unicode String
Degree (°) %%d U+00B0
Plus/Minus Tolerance (±) %%p U+00B1
Diameter (Ø) %%c U+2205

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