﻿ Getting Started Tutorials - MechDesigner > Elements, Symbols, Dialog-boxes, and Parameters > Elements and Symbols in the Graphic-Area

# Elements and Symbols in the Graphic-Area

### Elements and their Symbols

We use symbols to represent different elements in the graphic-area.

You can change the size and color of the different symbols with Graphics > Display Size

#### Symbols in the Graphic Area

 Planes in the Model-Editor. The model has three fixed Planes in the Model-Editor. Model Axes in the Model-Editor The model shows the fixed Red(X), Green(Y) and Blue(Z) axes. They locate the Global Origin of the model. Planes in the Mechanism-Editor. The axes on each Plane show its orientation. The smaller Red, Green and Blue axes are the Plane's X, Y, and Z-axes respectively. They locate the Plane's Origin and any Mechanism-Editor you may add to the Plane. Part-Outlines: Added Parts and Base-Part The Part-Outline is the symbol for a Part. •The Part-Outline symbol for an Added-Part is an oval •The Part-Outline symbol for the Base-Part is a rectangle. The Part's x, Y and Z axes are at its start-Point Each added-Part has a CAD-Line from its start-Point to its end-Point. Part-Outlines:  solved and unsolved Parts Each Part has two kinematic states: Solved and Unsolved The state is indicated by the color of the Part-Outline: •The Part-Outline is Green when it is a Solved Part. It has zero(0) degrees-of-freedom. Other terms for a solved Part are: kinematically-defined Part, and Green Part. •The Part-Outline is Blue when it is an Unsolved Part.  It has a maximum of three(3) Degrees-of-Freedom Other terms for an Unsolved Part are: free Part, and Blue Part. Pin-Joints in the Mechanism-Editor When you do Add Pin-Joint, you select a Point in two Parts. The symbol for a Pin-Joint between •Points in two different Added-Parts is a circle that is slightly larger than Point symbol •a Point in an Added-Part and a Point in the Base-Part is a symbol Slide-Joint in the Mechanism-Editor When you do Add Slide-Joint, you select a Line in two Parts. This symbol for a Slide-Joint is: •a narrow rectangle along one of the two Lines •a wide rectangle along the other of the two Lines •a small arrowhead, which indicates the positive direction of the slide-joint. Part-Axes in the Mechanism-Editor The Part-Axes symbols are 'small' in a Mechanism-Editor. •The Axes of the Base-Part are at the Origin of Mechanism-Plane •The Axes of an Added-Part are at the start-Point of the CAD-Line. Part Axes in the Part-Editor The Part-Axes symbols are large in the Part-Editor. •The X-axis is Orange •The Y-axis is Light Green The length of the CAD-Line maybe longer or shorter than the X-axis. If you zoom-in, the CAD-Line will appear to become longer relative to the axes. Mechanism-Editor Part-Editor Point Symbols Mechanism-Editor: The color of Point and sketch-element symbols depend on the kinematic state of the Part to which the sketch-element is a child. In the help we use these colors to help identify Point: •Mechanism-Editor: Points are Blue (Parts that are not solved), or Green (Parts that are solved) •In the Part-Editor: Points may be Blue (Not defined), or Black (defined) '+' : center-Points (center of Arcs and Circles) 'O' : start-point or end-point of Lines or Arcs. '' : start-Point or end-Point that is coincident with a center-Point The 'Locked Point' Symbol •When you use the Point Properties dialog-box to Lock and Specify a Point in a Part, the Points show as small Position Symbols. A Vector Symbol You can show vectors in the graphic-area when you: •Use the Point Properties dialog-box to show the Velocity-Vector and Acceleration-Vectors of a Point. •Use Calculate Forces and Display Force-Vectors to see the Force-Vectors and Torque-Vectors. Function-Block input-connector and output-connector Symbols Function-Blocks are a graphical icons that represent their function. •The input-connectors are to the left-side of the Function-Blocks. •The output-connectors are to the right-side of the Function-Blocks. •Wires are from an output-connector to an input-connector. Motor Symbol •When you Display Force-Vectors, the Motor-Symbol that drives a Joint is the Power-Source. •This image shows the Motor-Symbol at a Pin-Joint. •The Torque-Vector indicate the Application-Torque that a motor  must be able to drive. Spring The Spring FB element has three symbols in the graphic-area: Symbol : FB - see below Spring FB connectors Symbol : Spring between the anchor-points Symbol : Dimension between the anchor-points. Ball-Joint and Connecting-Part Symbol •The Ball-Joint has its own symbol. •Edit its radius in the Ball-Joint dialog-box. •The Connecting-Part symbol replaces the Part-Outline when you join a Part to a different Part with two Ball-Joints. Mass Symbol Profile Mass: When you add a Profile, the Extrusion has mass. A small symbol shows at the Center-of-Mass of each Profile. Total Mass: When you show Forces, the Total Mass is given next to the center-of-Mass symbol. The color of the symbol is the same as the Part-Outline, which becomes a random color when you Display Forces. Total Mass on EACH Part = Mass of Extrusions + Mass of Imported Solids + Mass of User Defined Mass 2D-Cam Contact Points When you add a 2D-Cam, the Contact points between the Cam and the Cam Follower are shown as small dowel symbols. If these Points do not delete when you delete a cam, then edit the Cam-Part, and delete them. Motion-Points The Symbol for a Motion-Point is a small triangle inside a small circle. The circle is slightly smaller than the standard symbol for a Point. Gear-Pairs The Symbol for a Gear-Pair is two involute Gears. The Gear-Pair is a kinematic-element - it transmits motion from its input part to the output-part. You can edit the Number-of-Teeth, Module, and many other parameters. Pulleys The Symbol for a Driving-Pulley is a different default color to a Driven Pulley See Application Settings > Graphics > Graphic colors. A Belt can drive the Pulleys, or a Pulley can drive the Belt.

#### Why is the Base-Part not Green?

 The Base-Part is not Green! If the Base-Part is a not Green (or a similar color) when you add your first Mechanism-Editor, it is usual that Display Force Vectors icon is enabled. Forces toolbar > Display Forces is enabled However, there are no Force Vectors to see in the model. To make the Base-Part Green, you should disable Show Force Vectors Click the Forces toolbar >Display Forces - it is now disabled. When the icon is gray, Force-Vectors are disabled and the Base-Part should be Green.

#### Why is half of the Base-Part hidden by a Plane?

 BasePart partial hidden by a Plane. The Base-Part is partly hidden by a Plane if the: Visibility toolbar > Show Solids in Mechanism is enabled When the Show Solids in Mechanism is enabled, we also show the Planes. You can do: Click Visibility toolbar > Show Solids in Mechanism to disable.   AND / OR Click Display toolbar > Display Planes to disable Display Planes

#### Why is the Base-Part Purple / Grey?

 The Base-Part is gray. The Grey Part-Outline of the Base-Part in a different Mechansim-Editor. You can see* Kinematic and sketch-elements of other Mechanism-Editors when the: Visibility toolbar > Show other Kinematic and Sketch-Elements - a Global Setting - is enabled AND Mechanism name-tab light-bulb in the other Mechanism-Editors - a Local Setting - are enabled. The Part-Outline of the Base-Part is a kinematic element. To hide the Part-Outline of the Base-Part, click the icon to disable the Global-Setting. Note: The color of the other Kinematic and Sketch-Elements is specified by: Application-Settings > Graphics tab > Graphic Colors > Background Sketch