How to identify the points in this figure ??

[XuFyan]

 

I know how to draw this figure, first i used the pline to draw the square and then fillet to round the corners of square, but how could i know at which points the circles are drawn in the figure ??

see the red circle marked with the red squares on the figure , how could i know at which point i can draw these circle ??

i want to draw only the left side because i can mirror it to the right

[bbankston]

XuFyan,

 

The drawing looks to be symmetrical vertically and horizontally. Looking at the left side you see that the apex of the 20mm radius is 10mm from the left. And from the top left you see that the apex of the 20mm radius is 10mm from the top. Draw those two circles and you shall see what you need to do.

[bbankston]

The 80, 30 & 160 are center-line dimensions.

[XuFyan]

i know the apex is 10 from the left and the top but i dont know how to draw the circle at that point where it is drawn in the figure actually i donot understand which coordinate system should i use ?? what should be the centre point of the circle ??? how would i find the centre point of all these circle ?? i am stuck on this figure and some other like this.

for example,

if i want to draw the bottom left circle , what should be its centre point ???

[XuFyan]

another figure i am stuck in..!

 

[bbankston]

i know the apex is 10 from the left and the top but i dont know how to draw the circle at that point where it is drawn in the figure actually i donot understand which coordinate system should i use ?? what should be the centre point of the circle ??? how would i find the centre point of all these circle ?? i am stuck on this figure and some other like this.

for example,

if i want to draw the bottom left circle , what should be its centre point ???

 

Are you using AutoCAD? Why would you need to worry about center-point? Incidentally, for the top left circle the Y axis is 30 for the center-point(radius plus 10) & the left middle circle's X axis center-point is also 30 (radius plus 10). Once you see that on your drawing look at your example provided and all will become clear.

[bbankston]

[ATTACH]22814[/ATTACH]

 

I'll answer from top down:

 

It's a fillet of 10. Once you've filleted you'll get the center-point.

 

The 20mm wide rectangle is in the center of your two circle's. You'll just 2 vertical lines that are longer than the overall drawing and trim at the 20 mm circle.

 

You're third question is answered above.