· Designing a Cam

· Designing Disc Cams

· We use Design Accelerator Disc Cam Generator to design and edit cams

· We learn

· Design disc cam

· Position the disc cam within the assembly

· Set disc cam properties

· Add your own motion file

· Set file name and display name for newly inserted Design Accelerator component

· Insert disc cam into the assembly (page 1)

· Start the Generator

· Open Cam_Spring.iam

· Design Accelerator assembly panel

· Click the Disc Cam tool

· Disc Cam Component Generator dialog opens in Design tab by default

· Note: To locate the Disc Cam tool for the first time

· In Design Accelerator panel

· Click arrow next to Shaft command (page 2)

· Specify Disc Cam Placement

· To insert model of disc cam into assembly

· Select Component in drop down list

· Select Component option from the pull-down list on the Cam group box

· Note: If you select No Model option only calculation is inserted into assembly

· Cam group box

· Click Cylindrical Face button

· Select cylindrical face of threaded section

· Click Start Plane button

· Click start plane (adjacent to cylindrical face selection) (page 3)

· Specify Disc Cam Parameters

· Cam group box

· Enter parameters for cam

· Enter 22 mm for Cam Basic Radius

· Enter 10 mm for Cam Width

· Click the More Options button in the right lower corner of Design tab to display additional options for cam design

· Follower Type group box

· Select Swinging Arm

· Follower Shape box

· Select Cylinder

· Follower group box

· Roller Radius: 16 mm

· Pivot Distance: 60 mm

· Arm Length: 60 mm

· Reaction Arm: 60 mm (page 4)

· Set Segments Values

· Actual Segment group box

· Drop down list

· Select 1

· Note: Or select segment by clicking on segment in graph

· Note: Segment length can be set by dragging segment end in graph area

· Selecting first segment

· Motion Function drop down list

· Select Double Harmonic - Part 1 type of motion

· First Segment End: 90 degrees

· Lift at End: 5mm

· Seclect Second Segment

· Motion Function pull-down list

· Select the Double Harmonic - Part 2 type of motion

· Second Segment End: 180 degrees (page 5)

· Add New Segment

· Segments added before of after current segment selection with buttons

· Add Before

· Add After

· Delete any new segments added

· Zoom button

· Zoom to cam element graphs on or off

· Save button

· Saves graph data to tab delemeted text file (page 6)

· Add motion file

· The Disc Cam Generator offers a list of motions available within pull-down list in Actual Segment box

· You can define your own type of motion or remove any user motion from the list.

· Define motion within text file

· Example of values of Polynomial motion of third degree:

· 0, 0

· 0.1, 0.028

· 0.2, 0.104

· 0.3, 0.216

· 0.4, 0.352

· 0.5, 0.5

· 0.6, 0.648

· 0.7, 0.784

· 0.8, 0.896

· 0.9, 0.972

· 1, 1

· Save file to desired location (revise instructions here, delimeter is not a comma)

· Click Add new user motion button to add custom motion

· Add Motion dialog box

· Set name of motion and specify path to the saved text file

· Click OK and your motion is added to the list (did not work, look this up in help)

· Each user motion is displayed with "user" icon

· Click Delete current user motion button to remove selected user motion (page 7)

· Perform The Calculation

· Switch to Calculation tab

· Set values to perform calculation and strength check

· Select Cycle time radio button

· Enter 1 s

· Follower Loads box area

· Force on Roller

· Enter 20 N

· Accelerated Weight

· Enter 0.010 kg for the

· Spring Rating

· Enter 2 N/mm for the

· Alowable Pressure

· Enter 200 MPa for for Cam and Follower Materials

· Modulus of Elasticity

· Enter 206700 MPa for both Cam and Follower

· Poisson's Ratio

· Enter 0.3 ul for both Cam and Follower

· Click Calculate

· Inputs that fail the calculation are displayed in red

· Reports of calculation

· Click chevron to display Summary Window below

· Message: "Calculation: Calculation indicates design compliance!"

· Click Notepad type button at top to view HTML report

· Click OK to insert cam into assembly (page 8)

· Filename Settings

· Disc Cam Generator dialog

· File Naming icon at top right of dialog

· File Naming dialog

· Change names as needed

· Check Always prompt for the name box (for every time we create a new component)

· Click OK to insert disc cam into assembly (page 9)

· Insert Disc Cam into the Assembly

· When designing disc cam we were prompted to place disc cam placement

· Thus disc cam is placed into selected position (page 10)

· Place Constraints

· Switch to Assembly panel tools

· Click Constraint

· Place Constraint dialog

· Select Tangent type to constrain cam (page 11)

· Summary

· We used

· Design Accelerator Cam generator to create and edit cams

· We learned

· Design disc cam

· Position disc cam within assembly

· Set disc cam properties

· Add your own motion file

· Set file name and display name for newly inserted Design Accelerator component

· Insert disc cam into assembly

· Must: Check help for further, detailed information (page 12)