Points on curve - measure x, y,

[STUARTF]

Hello,


Can anyone help with the follwing please:


How do I create points on a datume curve (created from an equation) and then measure them from a central point for x, y, co-ordinates?


View attachment 3104

 

[wsylvester]

if you made your curve from equation then placed points on the curve by ratio or len.. then an easy way is to make a hole chart in drawing mode

 

[STUARTF]

Thanks for this - I shall try.


I think I need to pattern points using fill then curve to get lots of points on the curve?

 

[trillicomm]

You can solve for x given with y, or vice versa, using the math equation. Mathcad and Excel Analysis work with ProE WF (Mathcad with M030).

 

[wsylvester]

Stuart,


you can place one point by ratio, then pattern the point.... say ratio is .1 then 10 divisions..... ratio .01 ----100 ...etc


once you have your hole chart setup...if you change the pattern then update the hole table...which can be saved as a text file...through table...select the chart then table drop down has the save as command


hth

 

[trillicomm]

Use this software www.curveunscan.com to populate all points (X,Y) in true scale.

General steps:
1. Export the curve to jpeg and any
2. Scale it
3. Assign the locations of x and y axis
4. Output to excel for x and y coordinates

T.

 

[STUARTF]

Thanks, but I think I need the x, y, dimensions to be in order so they can be input for machining.


The equation: r = 14.5 + 2.64*Sin(1080 * t)
z = 0
theta = t * 360


was put in by my MD and so I don't understand this equation or how to use it in excel etc.


Any more help would be a blessing.

 

[trillicomm]

Gglad to see you reveal the equation, ok, let me play with it. I am kinda of busy now, will give update in 48 hours.

 

[STUARTF]

Thanks trillicomm for the website.


But I do need it to be "spot on" it for some science instrument.


Thanks again though


Stu

 

[wsylvester]

stuart,


milling?....you want centerline path in g-code format??


or maybe what machine..if you want cutter comp

 

[STUARTF]

wsylvester,


Our chap is using 4th axis on a lathe with a 6mm ball nose cutter.


I'm no machinist, but I know they can't use my model . Machine does not have enough memory.

 

[wsylvester]

i'm more of a mill guy but sent you the code to your pm


19k for the path... cl file..no cutter comp..they should be able to cut and paste in their start and end of program for the machine...the numbers are good to .0001 tolerance

 

[wsylvester]

one more thing


your machinist should be able to set the axis to suit lathe..as this is a mill program


and they should be able to work in cutter comp

 

[wsylvester]

sent another file in the other direction.