﻿ Getting Started Tutorials - MechDesigner > Tutorial 6: Cams: Flat, Barrel, Globoidal, 'Slot' > 6A2: Cam-Shaft & Flat-Faced-Follower > 6A2.2: Swinging-Offset Flat-Faced Follower

# 6A2.2: Swinging-Offset Flat-Faced Follower

### Summary

This tutorial is similar to Translating Flat-faced Follower - see Tutorial 6A2.1

However, the Cam-Follower in this tutorial is Swinging (or Oscillating)

#### Add Parts: Cam-Shaft and Cam-Follower

The Parts for a Cam and a Cam-Follower can be in complex kinematic-chains.

In this tutorial, the kinematic-chains are basic:

The Cam rotates as a Cam-Shaft

The Flat-Faced Follower is a Rocker

STEP 2: Edit the Base-Part

 1.Add a Line - its start-Point will be the center of the Cam-Shaft 2.Add a Line - its start-Point will be the center of the Swinging-Follower 3.Add dimensions and constraints to the sketches 4.Exit the Part-Editor

 1.Add Part 2.Add Pin-Joint 3.Add Motion-Dimension FB 4.Add Motion FB 5.Connect a wire from the Linear-Motion FB to the Motion FB, and from the Motion FB to the Motion-Dimension FB.

The Flat-Faced Follower must be a sketch-loop. One of the sketch-elements must be a Line.

The best shape for a Flat-Faced Follower is a long, narrow rectangle. One of the long sides of the rectangle becomes the contact face.

STEP 1: Add the Flat-Follower Follower sketch-loop

The shape must be a sketch-loop. See dimension in the image to the left.

 1.Edit of the Swinging-Follower Part. 2.Add Line - the long side of the rectangle 3.Add Lines to give a rectangle : Line is short relative to Line . Line and Line are perpendicular (⊥). 4.Add dimensions and constraints. 5.Exit the Part-Editor (e.g. Double-click a sketch-element)

STEP 2: Add a Profile/Extrusion to the sketch-loop

 1.Click Solids toolbar > Add Profile 2.Click the sketch-loop 3.Click in the Command-Manager In this case the flat-face follower is offset to the Pin-Joint.

#### Define a Motion

STEP 1: Define a Motion

See MotionDesigner Help. Use the Blend-Point Editor to edit the motion.

Blend-Point

No

X - Input

Cam-Shaft

Y - Output

Cam-Follower

1

0

0

2

90

24

3

180

24

4

280

0

1

360 / 0

0

Cam is Undercutting

New Motion Timing

Final Cam

 1.Click Machine elements  toolbar > Add 2D-Cam The Command-Manager has two selection boxes for two elements: 2.Click the Part-Outline of the Cam-Shaft Part 3.Click the Flat-Faced Follower Profile 4.Click in the Command-Manager.

With a Flat-Faced Follower, the Outer Cam-Profile is not usually useful.

STEP 2: Hide the Outer Cam-Profile

 1.Double-click the Cam-Profile to open the 2D-Cam dialog. In the 2D-Cam dialog Display tab > Cam Visibilities 2.Click the Inner radio button.

The image above indicates that cam is Undercutting.

STEP 2: Edit the Motion

Use the Blend-Point Editor to edit the timing of the motion - the X-axis Blend-Point

Blend-Point

No

X - Input

Cam-Shaft

Y - Output

Cam-Follower

1

0

0

2

140

24

3

180

24

4

280

0

1

360 / 0

0

Now, the Cam does not undercut.