sr721sr Posted February 26, 2009 Share Posted February 26, 2009 I am trying to draw a sloped arc in 3d for a radiused soffit for a building I am working on. My end quest is to measure the radius of the arc to have a CNC router cut a templete for fitting. Any Ideas? Quote Link to comment Share on other sites More sharing options...
shift1313 Posted February 26, 2009 Share Posted February 26, 2009 do you need to draw it for visual effect? or do you have numbers you need to hit with it? Whenever I work with 3d curves is set up some straight lines and use them as snap points. then when i alter the spline curve it will snap to the line so you can move them up/down. do you have the rest of the model? is this for a roof overhang, under stairs, some sort of support? Quote Link to comment Share on other sites More sharing options...
sr721sr Posted February 26, 2009 Author Share Posted February 26, 2009 The soffit is in an atrium of an office. I can use a spline to draw the sloped arc, but after trimming it to the points I can't read a radius. Am I using the wrong line type or commands? Quote Link to comment Share on other sites More sharing options...
shift1313 Posted February 26, 2009 Share Posted February 26, 2009 im not sure if you can pull a radius off it now that you say that. But, if you are sending the drawing to be cut, you dont need to. hopefully someone will have the answer for you. Quote Link to comment Share on other sites More sharing options...
fuccaro Posted February 27, 2009 Share Posted February 27, 2009 If you have the spline, draw over an arc so that it approximates the spline as much as possible. Quote Link to comment Share on other sites More sharing options...
sr721sr Posted February 27, 2009 Author Share Posted February 27, 2009 I can't draw the sloped arc in 3D, only the spline. My reference points along the radius are sloping. I can hit them with a spline, but the only way I can hit them with an arc is to reset my UCS, and that only works for the first few, then it dosen't recognize them. Quote Link to comment Share on other sites More sharing options...
SEANT Posted February 27, 2009 Share Posted February 27, 2009 It sounds like you are describing a helix. This thread (http://www.cadtutor.net/forum/showthread.php?t=31757) does not involve architecture but may be dealing with the same sort of problem. Quote Link to comment Share on other sites More sharing options...
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