﻿ MechDesigner Reference & User Interface > 2.2 Mechanism-Editor: > Kinematic elements > Add Magnetic-Joint

# Add Magnetic-Joint

## Add Magnetic-Joint

See also: Magnetic-Joint dialog

See also:

YouTube Video : http://youtu.be/IME9Eb4mpQE

#### Terminology

 Magnetic-Joint : A Magnetic-Joint pulls a circular Profile to be in contact with an irregular Profile or a Curve. Profile : Two contours, that are a copy of the shape of a sketch-loop, that indicate the range of an extrusion - an MD-Solid. Curve : the smooth continuous profile/shape that we derive from a Point-Cloud Point-Cloud : Discrete Coordinates of the shape that you import with a Point-Cloud FB

#### IMPORTANT:

 Do not use Magnetic-Joints for normal modeling. A Magnetic-Joint does not use closed-form mathematical equations. The position of the Magnetic Driven-Part is solved with iterative, root-finding techniques. The model is more than 1000s times slower to solve than Slide-Joint, Pin-Joint, and Motion-Dimension FBs.

#### Preparation for Add Magnetic-Joint (Typical)

The Magnetic-Joint pulls a Circular-Profile onto an Irregular-Profile.

 A Part, to which the Irregular-Profile is a child. An Irregular-Profile, which is a •Profile that you add to a sketch-loop, or •Curve that you calculate from a Point-Cloud A Part, to which the Circular Profile is a child.  The Motion-Dimension FB that becomes driven by the action of the Magnetic-Joint.

### Add Magnetic-Joint

STEP 1: Pre-Position the Circular Profile

 1.HOME the model: Use the ALT+H key combination, or Run menu > Home. 2.Edit the Motion-Dimension FB | Base-Value so that the: Distance from the Circular-Profile to the Irregular-Profile  ... ... <  0.5 × Radius of Circular-Profile Note: See also Magnetic-Joint dialog-box > Advanced

STEP 2:Start the Add Magnetic-Joint command

 Mechanism-Editor: Add menu > Mechanism sub-menu  > Add Magnetic-Joint OR Mechanism-Editor: Kinematic-elements toolbar > Add Magnetic-Joint

STEP 3:Select the elements:

 1.Click the Irregular Profile 2.Click the Motion-Dimension FB that you want to 'drive' with the Magnetic-Joint. 3.Click Circular Profile

STEP 4: Complete the Command

 1.Command-Manager: Click in the Command-Manager.

Result: (usually)

 The Magnetic-Joint pulls the Circular-Profile to be in contact with the Irregular-Profile. A Point Symbol is at the contact. The Magnetic-Joint FB is near to the Point-Symbol There is a Magnetic-Joint icon below and right of the Motion-Dimension FB that is driven by the Magnetic-Joint.

STEP 5: Open the Magnetic-Joint dialog-box

### Video:

Video: Add a Magnetic-Joint