Globoidal Cam with Indexing Output-Shaft

We can use Machine-Elements toolbar > Add 3D-Cam to model Globoidal Cams.

This tutorial adds the 5 elements you need in the model before we do Add 3D-Cam

Note: 'Globoidal' Cams are also called 'Ferguson' or 'Roller Gear' Cams.

tog_minus        Indexing Globoidal Cams

Sankyo-indexer

Refer to the image:

The input is the Cam-Shaft. It has a Pink Axis
The output is the Cam-Follower Turret. It has a Red Axis.
The six(6) Cam-Follower Rollers are mounted to Cam-Follower Turret.

Their rolling axes - in Green- are perpendicular[⊥] to the axis Red Axis

Commercial Indexing Cams: 'Indexers'

Commercial Cam Indexers are nearly always enclosed in sealed, oil-filled cam-boxes. The cam-boxes are often cast, and then CNC machined to accurately locate the input and output shafts. Even so, there is often an eccentric to finally adjust the position of the output-shaft relative to the input-shaft.

The input and output shafts usually extend outside of the cam-box, although there are hollow output-shaft options, also. Backlash free, torsionally stiff couplings are used to connect the shafts to the other parts of the machine.

Often, the input-shaft is connected directly to a geared-motor. It is important the motor rotates at as near as possible to constant velocity‡. This is not as easy as it sounds, because the load inertia and torque varies considerably within each index period.  The motor must be isolated from these torque fluctuations with a high gear-ratio worm/wheel gearing.

You should make sure the angular velocity of the input-shaft is near to a constant value. For example, use a gearbox to drive the input-shaft so that motor rotates at near to its maximum rated speed at the maximum intended indexing speed. With the gearing, the motor behaves as a flywheel. If the input-shaft cannot rotate at constant velocity, the motion of the output-shaft will not follow exactly the indexing motion. This can cause damage to the Cam-Box, or damage to your machine. If the motor input speed is faster than planned, the accelerations and speeds of the output-shaft may far exceed that of the original motion-design. When the speed of the input-shaft is faster than intended, it is called 'over-run'.

Occasionally, there are two Cam-Follower indexes for each 360º rotation of the input cam-shaft. This is needed when there are many 'Stops'. Read the catalogues carefully.


A Cam from 'Destaco® North America'.

Click to Expand / Collapse Destaco catalogue
Click to Expand / Collapse
Destaco catalogue

Part Number: 140RGS 4H40-270©. See Catalogue Page 14 (IN-RGS-14). – External link to Destaco Catalogue.

'110'

Distance [mm] between the Input and Output Shaft

'RGS'

RDS is a 'Roller Gear with Shaft'.

RDG is a 'Roller Gear with Dial'.

'4'

Number-of-Stops - in this case, '4 Stops'.

The Input-Shaft makes 4 complete rotations for each single rotation of the Output-Shaft.

H32

The diameter of the Cam-Follower Roller Bearings, in units of 1/32 inch!

The diameter of the Cam-Follower Roller is Ø32/32 inches.

'270'

The Number-of-Degrees the input-shaft rotates to index the output-shaft. The Index-Period is 270º.

Thus, the Dwell-Period is 90º.

MS / MSC33

Motion-Law : MS : Modified Sine , Symmetrical.

MSC33 : Modified Sine with a 33% Constant Velocity, Symmetrical.


This Tutorial:

1.Reviews the Planes you need to model a Globoidal Cam
2.Prepares the model.
3.Adds the Globoidal Cam with Add 3D-Cam.
4.Uses the 3D-Cam dialog-box to configure the cam and calculate its coordinates.
5.Exports the 3D-Cam to SOLIDWORKS®.

tog_minus        Review of a Globoidal-Cam exported from MechDesigner to SOLIDWORKS®

GloboidalCam-SW1

In MechDesigner, a Globoidal-Cam is built on four Planes:

1s   A Plane for the cam Part - the Cam Part is a simple Crank

2s A Plane for the sketch of the Cam-Blank

3s   A Plane for the indexing Part, which is the Cam-Follower

4s A Plane for the sketch of the Cam-Follower Roller.

Notes:

1. The image above shows the four planes and their relative positions in a 'finished' Cam in SOLIDWORKS®.

2. I have added the Cam-Follower and Roller Parts and the Frame Bracket in SOLIDWORKS® to help visualise the model.

tog_minus        STEP 1: Add the Output Shaft: the Cam Follower Part with Cam Follower Rollers

The Cam-Follower Part

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STEP 1: Add a Mechanism – use the XY (Front) Plane
STEP 2: Edit the Base-Part, and add a Line – make it Horizontal, from the Origin. Dimension it as 70mm, Exit Part-Editor
STEP 3: Add a Part, edit the Part to be 80mm long.
STEP 4: Add a Pin-Joint: join the Part at its start-Point [origin] to the Line at the Origin of the Base-Part
STEP 5: Add a Motion-Dimension FB (edit its Base-Value to -135º) ; and a Linear-Motion FB
STEP 6: Rename the Mechanism to 'CAM-FOLLOWER' and the Part to 'CAM-FOLLOWER.'
STEP 7: Rename the Plane you selected for the mechanism to CAM-FOLLOWER

The Motion for the Cam-Follower Part

md-140-4h40-180-270-ms_zoom73

Design Note: When there are only a few 'Stops', such as four, the Pressure Angle can be high and the Cam Rib width between the rollers can be small.


MODIFIED SINE

In the catalogue page [see above], a 270º Index Period(β) uses a Modified Sine segment type/motion.

In the image - left - there are two Modified Sine Motions: one with an Index-Periods of 270º (Blue) and the other with an index-period of 180º (Magenta).

The Peak Velocity for the Modified Sine (β=180º) is ~315º/s and ~235º/s for MS (β=270º) index period.

Similarly, the Peak Acceleration is ~2200º/s/s and ~980º/s/s respectively.

That is, an index angle β=180º has ~20% higher peak velocity, and ~210% higher peak acceleration.

md-140-4h40-180-msc33_zoom71

MODIFIED SINE with 33% CONSTANT VELOCITY (MSC33)

In the catalogue page, the cam with a 180º Index-Period uses a MSC33 Cam-Law. This is Modified Sine, with Constant Velocity for 33% of the total Index-Period.

In the image to the left, the motions are Modified Sine (Magenta) and the MSC33 (Blue) - both with an Index-Period of 180º.

Peak Velocity

MS: ~315º/s
MSC33: ~270º/s

Peak Acceleration

MS(β=180º) = ~2000º/s/s
MSC33(β=180º) = ~2425º/s/s

The advantage of the MSC33 is its low peak velocity, NOT its high Peak acceleration!

A motion with a 'Reduced Peak Velocity' has a the 'Reduced Peak Pressure Angle'.

The Cam-Follower Part: Accumulate Output Motion and Gearing FB

MD-FB-MOTION

The Cam-Follower [output-shaft] rotates 4 x 90º to rotate a total of 360º.

The Cam-Shaft [input-shaft] rotates a total of 4 x 360º = 1040º.

To make the Cam-Follower move 4 x 90º, to rotate a total of 360º, you must:

1.Add a Motion FB to the graphic-area
2.Double-click it to open the Motion FB dialog-box.

The 'Select Motion' drop-down box shows all of the motions in MotionDesigner

a.Use the drop-down to select the index motion
b.Select the 'Accumulate Output'
c.Close the Motion FB dialog box.
3.Add a Gearing FB to the graphic-area
4.Double-click it to open the Gearing FB dialog-box. Set the Gearing Ratio = 4
5.Connect a wire from the Linear-Motion FB to the Gearing FB, and then a wire from the Gearing FB to the Motion FB.

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In one cycle of the MMA:

the output from the Linear-Motion FB is 0 – 360
the output from the Gearing FB is 0 – 1440
the Motion FB gives an index of 0 - 90 for each 0 – 360 at its input-connector. This occurs four times.

Thus, the Cam-Follower Part moves [indexes] four times, in one cycle of the Master-Machine-Angle [MMA].

When we design the motion for the Input cam-shaft, we also add a Gearing FB with a Gearing-Ratio = 4].

video1. This is how the model looks.

The Cam-Follower Rollers

A Globoidal Indexer is a 'Body' Closed Cam System.

A roller is in a cam groove/track, or two rollers are 'braced' across a cam rib, or two cam flanks

This design has eight rollers in a groove/track. They are at equal angles around the Cam-Follower Part as a 'dial', or 'turret'.

We will add two 3D-Cams. Hence, we need at least two Cam-Followers.


However, you can, if you want, add all eight of the Cam-Follower Rollers to see the cam engage with a roller for each rotation of the cam. However, this is not necessary.

To add eight Cam-Follower Rollers, each with an axis-of-rotation that is perpendicular[⊥] to the axis-of-rotation to the Cam-Follower Shaft:

Add eight Lines...
Add eight Planes, (select the Lines)...
Add eight Mechanism-Editors to the Planes...
Add a Circle sketch-element to the Base-Part of each Mechanism-Editor...
Add a Profile to each Circle

Remember, most of the effort below is not necessary. You only need to add two cam-followers to get two cam tracks in the cam. Thus, you only need to add two Lines, Planes, Mechanisms and Rollers.

MD-3DGLOB3

ADD EIGHT LINES

Edit the indexing Cam-Follower Part (Output-Shaft).

Prepare a layout sketch for the eight Planes and Mechanisms – see image – the layout sketch is in the Cam-Follower Part.

If we use constraints, we can reduce the number of dimensions to three.

STEP 1: Start the Part-Editor to edit the indexing Cam-Follower Part
STEP 2: Add eight 'long' Lines
Each long Line should radiate from the Origin of the Part. The start-Point of each Line should be at the Origin.
STEP 3: Add eight 'short' Lines.

The start-Point of the short Line should be at the end of the long Line.

This is important because we will select the short Line to add a Plane and Mechanism-Editor. The Origin of the Plane and Mechanism will be at the start-Point of the Line. Then we can sketch the Cam-Follower Roller at the Origin.

STEP 4: Add eight Equal constraints to the 'long' Lines, and eight Equal constraints to the 'short' lines
STEP 5: Add other constraints, such as Perpendicular, Coincident, Horizontal and Vertical.
STEP 6: Rename the short Lines to LRoller1, LRoller2...LRoller8, if you wish.
STEP 7: Close the Part-Editor.

MD-3DGlob4

ADD EIGHT PLANES

Use the eight short Lines in the sketch of the Cam-Follower  to add eight  and eight Mechanism-Editors.

STEP 1: Click Model toolbar > Add Plane in the Mechanism-Editor: CAM-FOLLOWER .
STEP 2: Click the Line: 'LRoller1'
STEP 3: Click OK-tiny-13-17 in the Add Plane dialog
STEP 4: Rename the new Plane to PRoller1

Add Plane Extrudes* the selected Line. Here, the Plane is at 90º to the CAM FOLLOWER-PLANE.

STEP 5: Do Steps 1-4 for each Line, LRoller1...8
STEP 6: Rename each new Plane to PRoller1...8.

*MechDesigner extrudes the Plane from the Line.

0º is coplanar with the active Mechanism-Plane. The default angle is 90º. This means the default setting makes the Plane perpendicular[⊥] to the Mechanism-Plane. You cannot see the Plane in the Front View. Use the arrow keys to spin the view if you want to see the Plane.

MD-3DGLOB5

This image shows the eight Planes.

The Origin of each Plane is at the origin of each 'short' Line.

This is because the 'short' Lines 'start' at the end of the 'long' Lines.

[I have indicated the Origin (0,0) and the +X direction for one of the Lines and Planes]

MD-3DGLOB6

This image shows the eight planes in the Assembly-Tree.

The Planes are children to the CAM FOLLOWER-PART.

MD-3DGLOB7

ADD EIGHT MECHANISMS

STEP 1: Click the CAM FOLLOWER Mechanism name-tab
STEP 2: Click the PRoller1 in the Assembly-Tree* to select it.
STEP 3: Click Model toolbar > Add Mechanism
STEP 4: Click OK-tiny-11-15 in the Command-Manager.

* The Planes are easier to select one at a time in the Assembly-Tree, because we have renamed each Plane...

You will 'Jump' to the New Mechanism.

STEP 5: Rename the Mechanism to MRoller1

ADD EIGHT CIRCLES AND PROFILE ELEMENTS for the Rollers

STEP 5: Edit the Base-Part, and add a Circle
STEP 6: Add a Coincident Constraint between the centre-Point and the X-axis and then also to the Y-axis.
STEP 7: Add a Radius to the Circle, make it (40*25.4/32/2)mm
STEP 8: Close the Part-Editor
STEP 9: Add a Profile. Use the Circle as the sketch-loop
STEP 10: Rename the Profile or the Extrusion to 'Profile-Roller1'

MD-3DGLOB8

STEP 11: Click the CAM FOLLOWER Mechanism
STEP 12: Use 'Show Model in Mechanism', ShowModelinMechanism-SMALL
STEP 13: Cycle the Mechanism – use the shortcut: ALT+C

The image to the left shows the new Roller, as shown in the CAM FOLLOWER mechanism.

My default Extrusion Depth is 30mm. A Standard Ø31.75mm Stud Roller is 20mm wide. You can reset the default Extrusion Depth in the Application-Settings | Auto-Profiles dialog-box, or use the Extrusion dialog-box of the Extrusion

video1 - This video shows the model as designed so far.

MD-3DGLOB9

Do 'ADD EIGHT MECHANISM and ADD EIGHT PROFILE ELEMENTS' again.

The Motion for the Cam-Follower and the design of the Cam-Followers is complete.

Rotate the image with your keyboard arrow keys to view the Cam-Follower Part and the all eight Cam-Follower Rollers.

tog_minus        STEP 2: Add the Input-Shaft: the 3D Cam Part

MD-3DGLOB10

There are two requirements for the orientation and placement of the Input-Shaft:

1.The cam-shaft1s-red (input) has an axis-of-rotation that is 90º to the axis-of-rotation of the Cam-Follower2s (output)
2.The Plane3s of the Cam-Follower Rollers intersects with the axis-of rotation of the cam-shaft1s-red

See below for more details.

The cam-shaft Part is Parallel, or co-planar, with the image above. The Pin-Joint for the cam-shaft, is at1s-red (image above). The Axis-of-Rotation is perpendicular[⊥] to the Plane of the image.

Add the Plane and Mechanism-Editor for the cam-shaft

MD-3DGLOB11

Add a short Line. The start-Point of the Line,1s-red gives the Origin of the new Plane. The Plane for the cam-shaft is perpendicular[⊥] to the Plane for the Cam-Follower.

STEP 1: Click the CAM-FOLLOWER Mechanism
STEP 2: Double-click the Base-Part to edit the Base-Part with the Part-Editor
STEP 3: Add a horizontal Line to the sketch, with an Origin1s-red at X=110mm, Y=0mm, and the end at (X+Length)mm
STEP 4: Double-click the Line or Y-axis to close the Part-Editor

[140mm because the Input and Output shafts are 140mm apart].

MD-3DGLOB12B

STEP 5: Click the new Line then Add Plane, Click OK-smallest.

Accept the default 90º for the 'Angle of New Plane:'

STEP 6: Rename the new Plane to P-InputCamShaft

Make sure the 'Show other Mechanism Sketches' and/or 'Show other Mechanisms' is/are toggled on.

STEP 7: Click the new Plane and then Add Mechanism, then OK

You jump to the New Mechanism.

STEP 8: Rename the new Mechanism to M-Input-CamShaft.
STEP 9: Use the Visibility toolbar > Show other Mechanisms in this Mechanism' tool, F11.

The image to the left shows the new Base-Part1s-red of the new M-Input-CamShaft mechanism. You can see, in grey, the other eight Base-Parts, with sketches and Cam-Follower Profiles.

Add the cam-shaft to the new Mechanism

MD-3DGLOB13

The Input-cam-shaft is a Crank. The Pin-Joint is at the Origin of the Base-Part in the new Mechanism: M-InputCamshaft.

STEP 1: Add a Part
STEP 2: Add a new Horizontal Line to the Base-Part, with its 'start' point at 0,0 in the Base-Part
STEP 3: Add a Pin-Joint between the Part and Line in the Base-Part
STEP 4: Add and connect a Linear-Motion FB to a Gearing FB to a Motion-Dimension FB
STEP 5: Rename the Part2s (Crank) to cam-shaft
STEP 6: Open the Gearing dialog-box, and set the Gearing-Ratio to 4.
STEP 7: This means it will rotate 4 times in one Machine-Cycle. The Gearing Ratio is the same as the Cam-Follower Part.
STEP 8: Open Motion-Dimension dialog-box. Change the Base-Value of the cam-shaft to 0º.

Click the video icon to the left to view the model so far. video1.

tog_minus        STEP 3: Add the Cam Blank Sketch – the shape of the Cam without Cam Tracks

Make a Cam-Blank Sketch. It must have the same 'cross-section' as the block of metal [Blank] before the Cams are cut.

Q: Where do I add the Sketch for the Cam Blank?

A: Add the Cam-Blank to the Base-Part of a new Mechanism and Plane.

Q: Why not use the same Plane as the cam-shaft Plane?

A: Although we can use the same short Line as the source of the Cam-Blank Plane, the Cam-Blank Plane is at right angles to the cam-shaft Plane.

It is coplanar with the Cam-Follower Plane.

Q: Why do we not add the Cam-Blank sketch to the Base-Part/Plane of the Cam-Follower Mechanism?

A: That is a good question! However, we must put the Cam-Blank a new mechanism. If you put the cam-blank sketch in the Base-Part of the Cam-Follower then when you come to transfer the 3D-Cam to 3D CAD, you will find the Cam-Blank is not in the correct place.

Orientation of the Cam-Blank

MD-3DGLOB29

To help orientate yourself relative to the other parts and mechanisms, you can use two useful tools

STEP 1: Click the Cam-Follower mechanism.
STEP 2: Click Visibility toolbar > Show Other Mechanisms and Sketches – F11
STEP 3: Click Visibility toolbar > Show Model in Mechanisms

MD-3DGLOB27

This is the view slightly rotated. Use the 'up/down' keyboard arrows.

Add Plane and Mechanism for Cam Blank Sketch.

MD-3DGLOB27A

STEP 1: Click the Cam-Follower Mechanism
STEP 2: Click the short Line that we used to add the Plane for the cam-shaft.
STEP 3: Click Add Plane

MD-3DGLOB27B

STEP 4: Enter '0º' for 'Angle of New Plane'
STEP 5: Click OK-tiny-13-17 to close the Add Plane dialog-box
STEP 6: Rename the Plane to Cam-Blank

MD-3DGLOB27C

STEP 1: Click the new Plane – in the graphic-area, or Assembly-Tree, and make sure it is in the Selection-Window
STEP 2: Click Add Mechanism
STEP 3: Click OK-tiny-13-17 in the Command-Manager
STEP 4: Rename the new Mechanism to CAMBLANK

Sketch the Blank and Add a Profile

MD-3DGLOB27D

STEP 1: Edit the Base-Part of the Mechanism CAMBLANK

Use the sketch tools to add a Sketch

Add the sketch as a Sketch-Loop.

The cross-section of a Globoidal Cam-Blank looks a bit like the sketch to the left!

STEP 2: Add a vertical Line to give the axis for the centre of rotation of the 'cam-shaft'
STEP 3: Rename the vertical Line to 'Axis-of-Rotation'.

MD-3DGLOB27E

If you use the 'Show other Sketches and Mechanisms' Tool, you can view the shadow of the 'Cam-Follower Roller' Profiles. This will help you judge the sketch-loop for the Cam-Blank.

You will notice the cross-section is 'dished'. This gives sufficient space for the swing of the Cam-Follower Rollers.

MD-3DGLOB26

Edit the cross-section where the Cam-Followers 'enter' the Cam-Blank.

MD-3DGLOB27F

STEP 4: Close the Part-Editor
STEP 5: Add a Profile. Use the Cam-Blank sketch-loop.

The image to the left shows the new Profile with the default 'pink' colour.

STEP 6: Rename the Extrusion to 'Profile-Cam-Blank'

MD-3DGLOB27G

Here, I use the 'Shown Model in Mechanisms' and 'Show other Sketches' tools.

The Extrusion Depth of the Cam-Blank Extrusion is 0.1mm thick – see Extrusion dialog-box

This lets you see the Cam-Follower Rollers above the Mechanism-Plane.

tog_minus        STEP 4: Add the 3D Cams

Add two 3D-Cams.

All the elements are in the correct orientation. Now use Add 3D-Cam to give a Globoidal (Ferguson, Roller Gear Drive) Cam.

Add 3D-Cam 1

MD-3DGLOB31

You must select the Mechanism-Editor that has the Part that represents the rotating Cam-shaft.

STEP 1: Click the cam-shaft Mechanism
STEP 2: Use the Visibility toolbar > Show other Mechanisms sketches
STEP 3: Spin the model (up/down; left/right keyboard arrows)

Your graphic-area should look like the image to the left.

Icon-Add3DCam

STEP 4: Click Machine-elements toolbar > Add 3D-Cam

CM-Add3DCam-0

The Command-Manager needs you to select five elements:

STEP 5: The Cam-Follower Part - in Grey
STEP 6: The Cam-Follower Roller Profile - in Grey
STEP 7: The Globoidal Cam Part - in Green
STEP 8: The Globoidal Cam-Blank Cross-Section Profile - in Grey
STEP 9: The Globoidal Cam Rotation Axis - in Grey

Select the five elements in order.

MD-3DGLOB32

STEP 10: Make the Selections in order, 1 to 5.

You have eight possible Profiles you could select for element '2' – the Cam-Follower Roller Profile.

Select the profile for the Cam-Follower Roller that has not yet 'entered' the Cam Blank.

In the image, the red arrow at 2s identifies the Cam-Follower.

Note that you select the Profile contour and not the sketch.

MechDesigner adds the 3D-Cam to the cam-shaft Mechanism.

btn_delkeywordSettings in the 3D-Cam dialog

MD-3DGLOB33

Q: Why is the 3D-Cam similar to a 'Worm-Cast'?

A: It is similar to a Worm-Cast because we calculate the 3D-Cam – like 2D-Cams – for the full 360º of the Master-Machine-Angle. The cam-shaft rotates four times and the Cam-Follower indexes four times.

Q: Why did we increase the speed of the input and output shafts by four times?

A: The Cam-Follower must index more than one time to enter and leave the Cam-Blank. To be sure, we moved the cam-follower four times, and the also the cam-shaft four times. Thus, in the Gearing FB, the Gearing Ratio = '4'.

Dialog-13.2-3DCam

Q: How do we remove the 3D-Cam data that we do not need to calculate the flanks of the 3D-Cam?

A: Use the 3D-Cam dialog-box...

 

STEP 1: Double-click the 3D-Cam, the 'worm-cast'.
or
Use the Selection-Window - see below

The 3D-Cam dialog-box opens, as shown to the left.


If the 3D-Cam dialog-box does not open when you double-click the 3D-Cam in the graphic-area, use the Selection-Window:

1.Click the 3D-Cam element in the graphic-area, or the Assembly-Tree
2.Right-click the 3D-Cam element in the Selection-Window
3.Click 'Edit...' in the contextual-menu

The 3D-Cam dialog-box will open.

Dialog-3DCam-Cam-RFlankLengths

Flank-Length

STEP 2: Click the Flank Length separator
STEP 3: Edit the Cam Start Angle and the Cam End Angles

These angles are relative to the Master Machine Angle

MechDesigner calculates the 3D-Cam between only Start-Angle and End-Angle

 

MD-3DGLOB35

It is sometime helpful to add an 'Extrusion' that is a simplified shape of the Cam Blank.

If you have the model of the Cam-Blank in SolidWorks, you can import it onto the CAD-Line of the Cam-Shaft Part.

Here, you can see the

Start Angle > 0

End-Angle is < 360

When you add a simple extrusion, it is easier to see where the 'Cam' enters and exits the 'Cam-Blank'.

Add 3D-Cam 2

MD-3DGLOB36

Now, we must add a 3D-Cam for the other track.

Toggle-off the 'Show Model in Mechanism'.

1.Click Add 3D-Cam again.
2.Click the 5 elements again

However, this time, select the Cam-Follower Roller, as indicated in the image to the left.

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Here, you can see the two 3D-Cams.

The Flank-Length is reduced - see Flank-Length separator, above.

The values are now:

1.1st Cam 'Cam Start Angle' is 17º. The 'Cam End Angle' is 120º.
2.2nd Cam 'Cam Start Angle' is 30º. The 'Cam End Angle' is 194º.

When the Flank-Length is reduced, it is much easier to see where the two 3D-Cams enter the Cam-Blank.

tog_minus        STEP 5: Edit the 3D-Cam and Export the Cam to SOLIDWORKS

NOTE: We recommend from MechDesigner 13+ you follow these instructions, after you have made changes to parameters in the 3D-Cam dialog-box

1.Save the 3D-cam as a STEP file [with the Save button].
2.Then open the STEP in SolidWorks®
3.Save the STEP file as a SLDPRT file
4.Open a prepared Cam-Blank in SolidWorks®
5.Use the SolidWorks® menu | Insert menu > Part... and select the SolidWorks® SLDPRT file of the 3D-Cam

The 3D-Cam should be in the correct physical location. You should be able to:

6.Click the 'Tick' in the SolidWorks® feature manager.
7.Use SolidWorks® menu > Insert menu > Feature > Combine, and subtract the 3D-Cam from the Cam-Blank.

You should now see the track of the 3D-Cam in the Cam-Blank.


Export the 3D-Cam surfaces as mesh data - this can take a long time!

STEP 1.Do you have correct Type-Libraries installed?

Before you can successfully transfer Cam-Data to SOLIDWORKS®, MechDesigner must have the Type-Libraries in its installation directory that match your installation of SOLIDWORKS®.

See Here: MD-Download SOLIDWORKS Type-Library

STEP 2.Open the 3D-Cam dialog-box and Edit the 3D-Cam settings:
1.Double-click the 3D-Cam in the graphic-area.

The 3D-Cam dialog-box should open.

If the 3D-Cam dialog-box does not open, then we recommend this method:

1.Click the 3D-Cam element in the graphic-area or the Assembly-Tree
2.Right-click the 3D-Cam element in the Selection-Window
3.Click 'Edit...' in the contextual-menu

The 3D-Cam dialog-box will open.


The 3D-Cam Separators

Cam tab:

Cam Mesh Density Parameters

See 3D-Cam dialog-box: Cam Mesh Density

Roller Clearances

See 3D-Cam dialog-box: Surface Clearances

Flank Length

See 3D-Cam dialog-box: Flank Length Control

Display tab

Display

See 3D-Cam dialog-box: Display

Rebuild and Save buttons

Rebuild and Save 3D-Cam-Data

See 3D-Cam dialog-box: Rebuild and Save buttons

STEP 3.Send the Cam to SOLIDWORKS

See 3D-Cam dialog-box: Cam Transfer

Tutorial and Reference Help Files for MechDesigner and MotionDesigner 13.2 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd