﻿ MechDesigner Reference & User Interface > 2.2 Mechanism-Editor > Function-Blocks > Kinematic Function-Blocks > Add Point-Data FB

## Point-Data FB

 Use a Point FB to measure the motion of a Point* has with respect to the Mechanism Plane. It has three output-connectors. From top to bottom, the motion-data at the output-connectors are the: ➔Motion of the Point* parallel to the X-axis ➔Motion of the Point* parallel to the Y-axis ➔Magnitude of the motion equal to: o√(X2 + Y2) Note: Motion include: Position, Velocity, and Acceleration of the Point*. * Point, start-Point, end-Point, center-Point, Motion-Point. The Point must be a child to a Part that is kinematically-defined.

STEP 1: Add a Point-Data FB to the graphics-area

 1.Click Kinematics FB toolbar > Point-Data FB or 1.Click Function-Blocks menu > Point-Data (FB) Then: 2.Click the graphics-area

The Point-Data FB is now in the graphics-area (and Assembly-Tree).

STEP 2: Open the Point-Data dialog:

 1.Double-click the Point-Data FB in the graphics-area OR

Point-DATA FB - with no  Point

STEP 3: Select a Point

 When the box is Select a Point: 1.Click a Point* in the graphics-area.

* Point, start-Point, end-Point, center-Point, Motion-Point.

The box is now: Selected Point is:

Point-Data FB- with a Point

STEP 4: Close the Point-Data dialog

 1.Click in the Point-Data dialog

The motion-data of the Point is now at the output-connectors of the Point-Data FB.

How to use the Point-Data FB:

You can connect a wire from the output-connector of a Point-Data FB:

 ... to plot the Position, Velocity and Acceleration of the Point with a Graph FB - see Note 1 below ... to the input-connector of a Motion FB. The motion-data from the Point-Data FB is the independent variable for a Motion in MotionDesigner, More usually, the independent variable is the output of a Linear-Motion FB - see Note 2 below ... to the input-connector of a Motion-Dimension FB - see Note 2 below

Note 1:

To plot the Position, Velocity and Acceleration of the Point in the same graph.

1.Drag a wire from the same output-connector of the Point-Data FB three times to different input-connectors on a Graph FB,

2.Use the Y–axis display options in the Graph Interface to display the three different motion-derivatives.

Note 2:

There is a message in the Feedback-Area: '1 Mechanism dependencies detected'.

You should Click Rebuild Now when the number of dependencies is more than 1 if the data is critical, before you use the data for a Cam, for example.