Cad drawing problem

peige

peige

peige

Soldato
Joined
18 Oct 2002
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Trying to do a blend between three features, this one has me stumped.

Rad 1 to Rad 2 going through point 3. I don't know the rad but one blending rad should hit all three features (ie tangential blends to 1&2 but through 3). Does anyone know how to construct the geometry that will be the centre of the arc that scribes through all three?

The full circle gives you an idea of the type of bend I need, the green lines are the profile I have so far.

I know, quite random for GD but I know a few CAD people read here.


blend
 
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This would be easy enough to construct in SolidWorks using sketch relations, but I'm not sure in the program you are using. Could you export the geometry as CAD neutral?
 
Hmm pretty sure 3 point would work using the tangent snap on most of the software I use

Maybe try another drawing package?
 
JBuk said:
Hmm pretty sure 3 point would work using the tangent snap on most of the software I use

Maybe try another drawing package?
Click to expand...

I've just got oneCNC, its primarily a drawing to CNC code package but this is the first thing i've tried to draw that I can't :o
 
peige said:
I've just got oneCNC, its primarily a drawing to CNC code package but this is the first thing i've tried to draw that I can't :o
Click to expand...

If you can't resolve it and no one here does it for you then id download a free trial of something like ez-cam, draw it out , take note of the circle centre and radius then draw the same geometry in onecnc

I'd do it for you but I'm not at work and when I am there I won't get time until late on
 
http://a360.co/1Q6CQ6O

ekbzglx.jpg
 
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Well by trying over and over I have arrived at a 17.2 rad which is pretty much close enough.

Still like to know how to do it properly!

/edit. Ok got the above, even smaller than my 17.2 that seemed near... 15.87 it is!

Thanks :)
 
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nevermind just seen your post :p

edit2: even took the wrong point, doh.

i'm probably just stupid but what do you actually need?
the 1st picture is pretty much impossible to get a proper match based of the circle.

see pic I just a used a 3point arc (red line), showing the issue
cad_zpsympspjji.png
 
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peige said:
Well by trying over and over I have arrived at a 17.2 rad which is pretty much close enough.

Still like to know how to do it properly!

/edit. Ok got the above, even smaller than my 17.2 that seemed near... 15.87 it is!

Thanks :)
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No idea what the radius is. Just plonked an arc down on the 3rd point and constrained it tangentially to the other 2 :P
 
dr_volki said:
nevermind just seen your post :p

edit2: even took the wrong point, doh.

i'm probably just stupid but what do you actually need?
the 1st picture is pretty much impossible to get a proper match based of the circle. see pic I just a used a 3point arc (red line), showing the issue
Click to expand...

Thanks for trying though, it was a hard one to explain. The answer of 15.878 is very different to the customers drawn 18.48 which explains why it wouldn't work ;)
 
peige said:
Thanks for trying though, it was a hard one to explain. The answer of 15.878 is very different to the customers drawn 18.48 which explains why it wouldn't work ;)
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I looked at it wrong now i've seen the final dwg, thought at first the black circles are the points you need it from.
And thats why you never let electrical people do mechanical :p
 
I keep misreading the title as 'cat drawing problem'. I wonder whether it would be a problem with drawing your cat, or a problem with your cat drawing (or not, as the case may be)
 
Gilly said:
I keep misreading the title as 'cat drawing problem'. I wonder whether it would be a problem with drawing your cat, or a problem with your cat drawing (or not, as the case may be)
Click to expand...

Well, I was expecting something like this...

NidofWh.jpg
 
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