Problem coincident contraints and circles Intersections

[Anonymous]

Hello, 

At first, sorry for my bad english, I hope it would be understandable.

I'm beginner on Autocad and I try to learn by myself. I'm currently busy for some hours with a beginner problem, the situation is really simple:

I draw a circle (radius = 800 cm ) and a rectangle ( L=120cm, l=10 cm, those dimensions have to be constant so I have applied dimensions contraints). I would like to force the positionning of this rectangle on my circle: the rectangle must remain horizontal and its 2 upper corners must be ON the circle.

After that, another rectangle (with the same dimensions) will be drawed : the right upper corner must be coincident with the left upper corner of the first rectangle (so on the circle) and its left upper corner must also be on the circle. 2 other rectangles must be drawed following the same way (check my file in attachment).

Is there any way to apply a contraint to make sure that "this point must be on the circle" ? My final purpose is to change manually the radius of the circle (the rectangles however must remain the same) and that rectangles placed on this circle adjust their position depending on the circle radius.

I tried with varied ways (with temporary circles) to spot the exact point who rectangle corners are supposed to be and then using the "coincident" contraint, but it doesn't work ( apparently coincident contraint doesn't work with a corner and a intersection )

Thank you to tackle my problem ! My file is in attachment, I tried to put text to make your understanding easier.

Julien 

[john.vellek · Accepted solution]

HI @Anonymous,

I just found your post on this issue - I apologize for my late response.

I am unsure what your end goal is for this issue. I am imagining that a polar array would be much easier and faster than what you are trying to create.

Please give me some more details and I will try to work through a solution for you.

[Anonymous]

I think your problem is using the "Coincident" constraint.  Select an endpoint on the properly constrained rectangle, then enter "Object" at command line <enter> then select the circle.

[Anonymous]

Hi John, 

Thank you for your answer. 

In fact, I finally found the solution a few days later using the simple "Aligned Contraint". I simply had to select the corner of my rectangle and the center of my circle and to specify the radius of the circle. But up to now, I haven't find any way to use the Coincident Contraint.

In any case, my problem has been fixed.

Thanks for your answers.