- Thread starter Tom-
- Start date

- Joined
- May 3, 2019

- Messages
- 402

Rather than using the focal points as inputs, could I save a step using the overall width and height of the ellipse as inputs?

This problem is my own and if I do not need the focal points to solve this I'd prefer to simplify the problem.

The back ground to this question and myself...

Solving this problem will allow me to build it into a spreadsheet where I can solve thousands of these and thus allow the configuration of a tool path on a machine with an overall elliptical form.

I'm not terrifically math savvy, but am willing to learn. I feel like I could work this out if I had graphics that explained the voids in my knowledge.

Maybe it would be better to ask; what is the best approach to this solution?

It seems the focal distance equation may be unnecessary...?

This problem is my own and if I do not need the focal points to solve this I'd prefer to simplify the problem.

The back ground to this question and myself...

Solving this problem will allow me to build it into a spreadsheet where I can solve thousands of these and thus allow the configuration of a tool path on a machine with an overall elliptical form.

I'm not terrifically math savvy, but am willing to learn. I feel like I could work this out if I had graphics that explained the voids in my knowledge.

Maybe it would be better to ask; what is the best approach to this solution?

It seems the focal distance equation may be unnecessary...?

Last edited:

- Joined
- May 3, 2019

- Messages
- 402

major semi is 4

minor semi is 2

random point on the ellipse is x2.0029 y1.7312

Nray equals 2.0029 divided by 16--->0.12518125 and 1.7312 divided by 4--->0.4328

tan theta = (0.4328 times 4 ) / (1.7312 times 16)

tan theta = 1.7312 divided by 2.0029

tan theta = 0.86435

The knowledge gap here is huge. ugh

If tan theta is 0.86435 then I don't see the value...

- Joined
- May 3, 2019

- Messages
- 402

I just discovered that this site won't let me upload a spreadsheet with .xlsx. If you would like to PM me with your email address, I will email it to you. I don't know why I can't just attach it here.

- Joined
- May 3, 2019

- Messages
- 402

I have gotten very busy with other pursuits and have not yet tried to solve for the other half but hope it is something I can come up with when it is time.

You are very kind to help folks with such things LCKurtz!

Tom-