gotchy Posted April 19, 2014 Share Posted April 19, 2014 Hello, I need to learn to snap two or three arcs together for blending purposes. I draw cams and this is a must. I enclose a screen shot to demonstrate what I am looking for. I have blended the arcs together on the left hand side, by eye, (rather badly) and if you look at the right hand side you will see what I am trying to do. Thank you, gotchy Quote Link to comment Share on other sites More sharing options...
Dadgad Posted April 19, 2014 Share Posted April 19, 2014 Mightn't circles using the TTR (tangent tangent radius) option give you a nice transition from one arc to the next, after which you could use the TRIM command to remove what was not required, then PEDIT JOIN them? Quote Link to comment Share on other sites More sharing options...
eldon Posted April 19, 2014 Share Posted April 19, 2014 Or even Fillet, with a suitable blending radius. Quote Link to comment Share on other sites More sharing options...
Dadgad Posted April 19, 2014 Share Posted April 19, 2014 Or even Fillet, with a suitable blending radius. Better yet, and much quicker! Quote Link to comment Share on other sites More sharing options...
lamensterms Posted April 19, 2014 Share Posted April 19, 2014 Just want to throw in my two cents, and a heads-up too... I have found that FILLETing can sometimes fail between two curves if the curves are part of a polyline. So if you are finding that you cannot FILLET 2 curves, try exploding them out of the polyline, then you can re-join the polyline after filleting. Quote Link to comment Share on other sites More sharing options...
nestly Posted April 19, 2014 Share Posted April 19, 2014 "Old school" method would be to offset each object by the desired radius and then use the intersection as the centerpoint for the arc/circle. CIRCLE command using TTR and FILLET command are two more solutions, as mentioned above. Another option for those using a newer version of AutoCAD is Geometric Constraints. Quote Link to comment Share on other sites More sharing options...
JD Mather Posted April 19, 2014 Share Posted April 19, 2014 Hello,... I draw cams and this is a must. ... Can you attach an example cam you have designed using AutoCAD? What speeds do these cams operate at? Also need follower shape geometry. Quote Link to comment Share on other sites More sharing options...
gotchy Posted April 20, 2014 Author Share Posted April 20, 2014 Wow am I embarassed. I can't believe that a simple thought like using the Fillet tool slipped by me. I really should have known that one, sorry. gotchy Dr Mather, Sir, Due to Company constraints, I am unable to show any drawings that may or may not be considered "proprietary", other than the simple example that I have shown. Just generally speaking, these are not high speed cams, and average out to about 150 CPM. The cam followers used are simple radial bearings.Their main use is in the Wire-Forming Industry, however I sincerely thank you and all concerned for your help and your effort. gotchy Quote Link to comment Share on other sites More sharing options...
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