# Tutorial 5: Basics: Function-Blocks for Motion

## Function-Blocks (FBs)

MechDesigner is different to normal CAD. Parts move in MechDesigner! Motion is within its kernel, and not added later to a 'standard CAD' package.

Function-Blocks (FBs) can be divided in to two types. They are:

 • FBs that specify or measure the motion of Kinematic elements [Parts and Joints] - we call these the 'Kinematic-FBs'.
 • FBs that we use for modeling - we call these the 'Modelling-FBs'.

Note: Also, there are FBs that we use for Force Analysis. We will show these in a later tutorial.