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

# Kinematic FB | Add Measurement FB

### Why use a Measurement Function-Block?

 Measurement FB: •A driven dimension •At the output-connector(s) - the dimension, its first, and its second motion-derivative. Output-Connectors: •Two output-connectors for a measurement between two Points - see more below. •One output-connector for a measurement between other sketch-elements. Measure: •Length of a Line , Radius of a Circle •Distance between: two Points, a Line* and a Point, two parallel Lines* •Angle between: two Points, two Lines*, three Points. *A Line and CAD-Line, ,You can also dimension between a sketch-element and the X-axis or Y-axis of a Part.

STEP 1: Add the Measurement FB

 1.Click Kinematics FB toolbar > Measurement FB or 1.Click Add menu > Measurement FB 2.Click a sketch-element, or sketch-elements between which you want to measure. 3.Click the graphic-area.

The Measurement FB and the Measurement Dimension show in the graphic-area.

Uses :

Connect a wire from the output-connector of a Measurement FB to the input-connector of a:

 •Motion-Dimension FB or Motion-Path FB - the Motion-Part or Motion-Point uses the Measurement as its motion. •Motion FB - the Measurement becomes the X-axis for the Motion, and the output from the Motion FB will be the Y-axis of the Motion Note: Message 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 of a different kinematic-chain.