﻿ Getting Started Tutorials - MotionDesigner > Understand the Graphs

# Understand the Graphs

Navigation:  Getting Started Tutorials - MotionDesigner >

# Understand the Graphs

## Motion

Motion is an abstract concept. It is difficult to order a motion off eBay or Alibaba, for example.

Motion design software is only useful if the motion is visible. The easiest method to make a motion become visible is to plot a motion as a graph - this is MotionDesigner.

A different method is to move machine-elements in a model with the same motions as the motion graphs. That is what MechDesigner does.

#### Motion Graphs in MotionDesigner

 You can see up to four graphs in MotionDesigner: Position, Velocity, Acceleration, and Jerk. These are the four motion-derivatives. You can use the P,V,A, J icons in the View Toolbar, to show or hide each motion-derivative. You must show a minimum of one graph. You should understand: : The X–axis  is for all Graphs The four motion-derivatives have one X-axis. The X-axis is at the bottom of the graphs. Most typically, the X-axis is from 0 to 360 degrees - equal to the Master-Machine-Angle in MechDesigner. Other units for X-axis are: radians, cycles, seconds, milliseconds. The X-axis units of each Motion name-tab, can be different. : Each motion-derivatives is the same motion. We show for you the motion-derivative of the same motion exactly above each other. If you edit a motion-derivative of one segment, you also change the shape of the segment of the other motion-derivatives. : Split the motion into Segments It is easier to design a motion when you split it into segments. Each segment has a Motion-Law. You can change the Motion-Law for each segment, with the Motion-Law Selector  - a drop-down box below the graph-area.. : Blend-Points join the segments Blend-Points join the segments end-to-end. (Blend-Points are also called Nodes). 5:  Segment naming conventions. For convenience, we name the segments in the help as the: •Selected-Segment - the RED segment you edit. •Previous-Segment - one segment before (to the left) the Selected-Segment. •Next-Segment - one segment after (to the right) of the Selected-Segment. As soon as you click a different segment, it becomes the Selected-Segment and RED.