Bogbadbob658 Posted March 26, 2012 Share Posted March 26, 2012 Ok I feel dumb for posting this but I can't figure it out. I have a line and an arc which are offset to each other. How do I fillet between the arc and the line. Every time I try to do it, it doesn't give the solution I want. I have attached a file which will show you what I mean. I want to fillet between the horizontal white line and white arc with a unit size of 6 so that the result is as shown by the red arc. File1.dwg Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 26, 2012 Share Posted March 26, 2012 The red arc has a radius of less than 6. Quote Link to comment Share on other sites More sharing options...
Bogbadbob658 Posted March 26, 2012 Author Share Posted March 26, 2012 The red arc has a radius of less than 6. I draw the red arc by eye just to show what I'm trying to achieve. Quote Link to comment Share on other sites More sharing options...
eldon Posted March 26, 2012 Share Posted March 26, 2012 The simple answer is that there is not enough room to draw the arc of radius 6 between your arc and the line, and so the fillet command will make a tangential arc at the other side of the arc produced. Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 26, 2012 Share Posted March 26, 2012 I think you have some funky geometry and that it (the compound curve) won't work the way you want it to. Quote Link to comment Share on other sites More sharing options...
Dadgad Posted March 26, 2012 Share Posted March 26, 2012 The red arc has a different center than the white one, which seems to be a bit problematic. If you do get it to fillet it won't look like the red arc as drawn, which has a radius of 4.615, or if it does, it won't be in the same place, more like the blue one. Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 26, 2012 Share Posted March 26, 2012 It will work this way though. The angles are 45 deg. Quote Link to comment Share on other sites More sharing options...
Bogbadbob658 Posted March 26, 2012 Author Share Posted March 26, 2012 @Remark - You solution works except that you have to move the centre of the smaller arc relative to the horizontal line. However I have worked out a way of doing it by drawing a circle using tan,tan,radius and then trimming it up. Long winded but it works. Thanks to everyone for there help. Quote Link to comment Share on other sites More sharing options...
eldon Posted March 26, 2012 Share Posted March 26, 2012 Given the positions of your initial entities, I would be intrigued to see how you have managed it. Perhaps you could post a dwg file to demonstrate the final positions of the arcs and lines. Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 26, 2012 Share Posted March 26, 2012 My solution works without fudging it. Quote Link to comment Share on other sites More sharing options...
Bogbadbob658 Posted March 26, 2012 Author Share Posted March 26, 2012 My solution works without fudging it. When I draw it using your method the vertical distance from the horizontal line to the centre of the arc is 3.879 where as my original drawing has the distance as 3.600. What you drew was geometrically correct but doesn't work when the distance is pre specified. @eldon. I have attached a file with the circle drawn before trimming. Using the circle command type in _ttr, select the arc and the horizontal line then type in the radius 6. File2.dwg Quote Link to comment Share on other sites More sharing options...
ReMark Posted March 26, 2012 Share Posted March 26, 2012 Geometrically correct. That's what one would strive for in constructing a compound curve since they would share one common tangent. My background is civil engineering and this is how a compound curve was laid out in the field when staking out the centerline of a road. Quote Link to comment Share on other sites More sharing options...
eldon Posted March 26, 2012 Share Posted March 26, 2012 @eldon. I have attached a file with the circle drawn before trimming. Using the circle command type in _ttr, select the arc and the horizontal line then type in the radius 6. Thank you very much for being so patient. I was still trying to get the Fillet to work (unsuccessfully). As you so rightly say, Circle TTR is the answer. Well done on solving your own problem. Quote Link to comment Share on other sites More sharing options...
Bogbadbob658 Posted March 26, 2012 Author Share Posted March 26, 2012 Geometrically correct. That's what one would strive for in constructing a compound curve since they would share one common tangent. My background is civil engineering and this is how a compound curve was laid out in the field when staking out the centerline of a road. The only point I was trying to make was my solution is also geometrically correct but doesn't rely on moving the arc in it's relationship to the horizontal line. Quote Link to comment Share on other sites More sharing options...
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