Cam-Coordinates Data dialog-box

See Add Cam-Data FB


Edit a Cam-Data FB to open Cam-Coordinates dialog-box, then:

Select a 2D-Cam
Calculate cam-coordinates in different formats and
Save cam as different file-types
hmtoggle_plus12D-Cam : Related Elements and Actions

2D-Cams have a number of related elements, Function-Blocks and dialog-boxes. Their relationships are indicated in the table below.

Action 1A

Add 2D-Cam

... optional ...

 

Action 1B

Edit 2D-Cam Cam Display and Properties dialog-box

Action 2A                

Add Cam-Data FB

Action 2B

Edit the Cam-Data FB to link it to a 2D-Cam. Do 3A and 3B.

Action 3A

Do Cam-Analysis [with Graph FB]

Action 3B

Edit the Cam-Data FB again. Calculate Cam-Coordinates

*Force and Stress analysis only: Configure Power Source

Cam Coordinates: File types and Formats

 Save Cam Surface as :

Bi-Arcs

Equal Machine Angle Increments

STEP :

N/A

Internal, External as Surfaces

TEXT :

Internal, External

Internal, External, Pitch-Curve

DXF :

Internal, External

Internal, External

 


 

 

Direct export to SOLIDWORKS as :

Internal, External

Internal, External, Pitch-Curve

Table of 2D-Cam file-types and formats


Cam-Coordinates dialog-box

Cam Coordinates dialog-box - MD14.

Cam Coordinates dialog-box - MD14.

Top-Tip:

To 'paste' cam coordinate data directly into Excel®

1.Select the 'Tab' delimiter 11-R-RED
2.Calculate the Data with the Recalculate button8-R-RED
3.Click the 'Copy all data to the Clipboard 3-R-RED
4.In excel, Paste Special

1-R-RED

Icon-DialogCamCoords-Clear

Clear Data in the table

2-R-Red

Icon-DialogCamCoords-Save

Save as File types

STEP
DXF
ASC
TXT

3-R-RED

Icon-DialogCamCoords-Clip

Copy Data in table to Clipboard

4-R-RED

Icon-DialogCamCoords-Cam1

Icon-DialogCamCoords-Cam2

Icon-DialogCamCoords-Pitch

Calculate Coordinates for

Internal Cam 1
External Cam 2

5-R-RED

Icon-DialogCamCoords-Points

Icon-DialogCamCoords-Chords

Toggle :

Equal Increments: Calculate Cam-Coordinates with equal increments of Master Machine Angle with the 'Number-of-Points' as entered in '# Points' [10].

Chord Error: Calculate Cam with Biarcs, with a maximum Chord Error equal to the value in Box [10]

6-R-RED

Icon-DialogCamCoords-Lines

Icon-DialogCamCoords-BiArcs

Calculate Cam Coordinates as:

XY-Points as Equal Machine Angle Increments

Bi-Arcs with a Chord Error

7-R-RED

Icon-DialogCamCoords-SolidWorks

Send Cam-Coordinates to SOLIDWORKS®.

To a new or an existing open SOLIDWORKS® Part document.

Save the active SOLIDWORKS® document before you click button


Bi-Arcs are constructed in SOLIDWORKS as sketch entities.

Points are constructed in SOLIDWORKS as Curves, which you can convert to a Spline sketch-element. See Note 4

Note: You can also save the Cam as a STEP file.

8-R-RED

Icon-DialogCamCoords-RebuildRed

Icon-DialogCamCoords-RebuildGreen

Traffic-Light Red - Click to calculate coordinates.

Traffic Light Green - Cam Coordinates are ready. You can save them to disk or export to SOLIDWORKS®

When you click this icon, MechDesigner calculates the Cam-Coordinates again with:

[4]: Cam 1 or Cam 2 or the Pitch Circle Coordinates
[5] Equal increments of the Master Machine Angle[Points only] or Chord Error [Biarcs only]
[6] Points or Biarcs

 

 

Icon-DialogCamCoords-Open

[Does not do anything [MD14+]]: Closed Cam: When you calculate the Cam-Coordinates, the first and last cam point become different.


Icon-DialogCamCoords-Closed

[Does do anything [MD14+]]  Open Cam: The first and last coordinate become the same. The cam will be closed.

9-R-RED

Icon-DialogCamCoords-Measurment

Click to display a Cam 'plot' of actual cam-points that are calculated.

10-R-RED

Cam-ChordalError

Enter Maximum Chord Error

Use with 'Chord Error' option. [Minimum ~0.1µm. Experiment!]

CamNumberofPoints

Enter Number-of-Points

Use with 'Equal Increments' option. [Maximum ~100,000. Experiment!]

11-R-RED

Icon-DialogCamCoords-SaveOptions

'Save Options' button [See 'Save Options' box, below]

Delimiter for a Cam Save as TXT file: Comma [,]; Tab [   ]; Colon [:]; Space [ ]; Semi-Colon [;]; Dash [-].

STEP File Options:

Spline with End Corrections?

Spline to Interpolate 'actual' Kinematic Points?

12-R-RED

The Calculated Cam Coordinates, using the button settings detailed above.

Save Options button:

'Save Options' box.

'Save Options' box.

Click the Save Option buttons to show:

Delimiters

When you save the Cam data to a text file, you can add a different 'delimiter' between each column of data at each cam  'index'.

STEP Save Options:

End Correction
Interpolate kinematic points.

Notes:

Note 1: For a rotating 2D-Cam (a standard 2D-Cam), make sure the Origin of the Part is the Centre of the Cam.

Note 3: The maximum error between the 'true' cam and the actual cam data is less with Chord Error with Arcs than with Chord Error with Line.

Note 4: The data will be on the XY Plane, with Z columns as '0'. SOLIDWORKS fits a Spline to it immediately.

If you need to put the data on a different plane in SolidWorks, then you will need to change the data slightly in Excel. Add a column of zeros in the X, Y or Z column. Possibly multiply a column -1. Then import the data as a Curve entity into SOLIDWORKS.


The Cam as Arc Data has six columns:

1

2

3

4

5

6

Arc Radius

Arc Start Point X Coordinate

Arc End Point X Coordinate

Arc Start Point Y Coordinate

Arc End Point Y Coordinate

Arc Angle Range (degs)

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