How to create points set on inner most curves in a pattern of curves & how to export those point
How to create points set on inner most curves in a pattern of curves & how to export those point
(OP)
Requirement:
1. I want to make a profile, by creating a pattern of circles along a epicycloid curve and by selecting the radially inner most point of those circles.
What I did:
1. I created the epicycloid curve using expression (fig 1)
2. Then I created a circle at a point on the curve (fig 2) and made instances (pattern) along the curve (fig 3)
Problem:
1. Now I want create points along the innermost curves. How to create such points?
(I created those points by manually creating a line and then pattern it for 360 degree and then making intersection points at the innermost curves (fig 4). But it is very laborious. Is there any easy way by any inbuilt method or by GRIP or by Journaling)
(Mathematically those points are located, normal (towards centre) to the tangent at each point of base curve (epicycloid) curve and those are not simply radially innermost with respect to the pattern circle)
2. How to export those points to excel or text file?
(I searched this forum & got many GRIP or Journal files. But I don't know, which program to use for this specific problem.)




Thank You
Regards
shiva
1. I want to make a profile, by creating a pattern of circles along a epicycloid curve and by selecting the radially inner most point of those circles.
What I did:
1. I created the epicycloid curve using expression (fig 1)
2. Then I created a circle at a point on the curve (fig 2) and made instances (pattern) along the curve (fig 3)
Problem:
1. Now I want create points along the innermost curves. How to create such points?
(I created those points by manually creating a line and then pattern it for 360 degree and then making intersection points at the innermost curves (fig 4). But it is very laborious. Is there any easy way by any inbuilt method or by GRIP or by Journaling)
(Mathematically those points are located, normal (towards centre) to the tangent at each point of base curve (epicycloid) curve and those are not simply radially innermost with respect to the pattern circle)
2. How to export those points to excel or text file?
(I searched this forum & got many GRIP or Journal files. But I don't know, which program to use for this specific problem.)




Thank You
Regards
shiva





RE: How to create points set on inner most curves in a pattern of curves & how to export those point
Going by "4.jpg", it seems to me that if you offset the original epitrochoid curve by the distance of the radius of the circle, all your created points would lie on this offset curve. So, rather than creating all the points manually, you could offset the original curve and use a point set to (automatically and associatively) create any number of points along the curve.
www.nxjournaling.com
RE: How to create points set on inner most curves in a pattern of curves & how to export those point
Sorry! I didnt notice that other figures are not attached!
Here I attach the part file which is created in nx8, in which I made the sketch.
Link
By offset, we will not get the same profile as required. Beacause while offsetting every point on the curve will move radially inwards. What I want is every point should move Normally to its own location.
Thank you
RE: How to create points set on inner most curves in a pattern of curves & how to export those point
www.nxjournaling.com
RE: How to create points set on inner most curves in a pattern of curves & how to export those point
So the offset curve works for this specific problem but it will not helps in selecting outer or inner boundary for other problems.
For example, if the same epitrochoid curve is rotated (circular pattern for 6 times) about an eccentricity (take 2 mm on x-axis), then how to select only the outermost curves! Here I attached the part for reference.
Link
Also please tell me how to export the point sets to excel or txt format.
Thank you
RE: How to create points set on inner most curves in a pattern of curves & how to export those point
www.nxjournaling.com
RE: How to create points set on inner most curves in a pattern of curves & how to export those point
But this also gets so tedious, when the pattern curves are more!
Is there any way by making window selection of all the curves, only the outer or inner boundaries will be selected?
Thank You
RE: How to create points set on inner most curves in a pattern of curves & how to export those point
www.nxjournaling.com
RE: How to create points set on inner most curves in a pattern of curves & how to export those point