﻿ MechDesigner Reference & User Interface > 2.2 Mechanism-Editor: > Kinematic Function-Blocks > Add Measurement FB

## Measurement FB

 Use a Measurement FB to measure a Dimension. You can measure the: •Length of a Line, CAD-Line •Radius of a Circle, arc •Distance between two Points** •Distance between a Line* and a Point** •Distance between two parallel Lines* •Angle between two Lines* •Angle between three Points** * Line, CAD-Line, X-axis, Y-axis. ** Point, start-Point, end-Point, center-Point, and Motion-Point. The motion-values at the output-connector(s) of a Measurement FB. The measurement is usually between sketch-elements that are in different Parts. Thus, the dimension changes throughout the machine-cycle. The motion-values at the output-connector(s)§ s of a Measurement FB: •are a function of the Master-Machine-Angle •include the continually changing dimension •include the first and second motion-derivative of the dimension. § There are two(2) output-connectors when you measure the distance between two Points* - see more details below Connect wires from the output-connectors of a Measurement FB You can connect wires from a Measurement FB to a: •Graph FB or Stats FB - to analyze the dimension and motion-values •Motion-Dimension FB or  - to use the output as the motion-values for a Motion-Part. •Motion-Path FB - to use the output as the motion-values for a Motion-Point. •Motion FB - to use the motion-values as the X-axis of a Motion design in MotionDesigner. •Math FB - to use the motion-values in an equation, or to change the units of the motion-values. Messages: Messages in the Feedback-Area may be: '1 Mechanism dependencies detected'. This means, that the motion of a kinematic-chain is a function of (dependent on) the motion (measurement) of a different kinematic-chain. It is usually called Motion-Dependency.

Measurement FB between two Points

 1.Click Kinematics FB toolbar > Measurement FB or 1.Click Add menu > Measurement FB 2.Click a sketch-element or the sketch-elements between which you want to measure. In this example, the Measurement FB and Dimension is between two Points 3.Click the graphic-area.

The Measurement FB and Dimension are now in the graphic-area.

Note:

 In the graphic-area, to move the: •Measurement FB – Drag the FB •Dimension – CTRL + Drag the FB or the Dimension.

### Measurement FB

 Linear Distance
 Angle between Three Points
 Angle between Two Lines