Re: CAD draw 4th axis part
hy, i guess the problem is that you have to keep the cutting section orientation constant, while the software is tilting it, in respect to path orientation
i could start my SW and give it a try, but anyhow, i would not aproach it like that, because i know that when a 4th axis is used, you have somehow to corelate the feed and everything, because the motion is interpolated, and not all cam's are doing it right, thus they may output the toolpath, but may fail in computing the correct feed
i would actually draw the cilinder in 2d, and output parametric code for the finishing, because i believe that you are looking for some tight tolerances, and like this i would obtain the level of control where i would be comfortable
otherwise, you may be lucky, if wall deviation is < required tolerance, and in such a case, you could machine it just like that ( for example, if you look for 0.2 tolerance and walls deviation is 0.1, then is all ok )
i am not saying that fixing SW is not possible ... i am just saying that i can do it faster in 2d + wrapping the final code ( using a macro eq, etc ), then the time required to dig for a sw fix / kindly
ps : i also hit into something similar a while ago, when trying to design reamers with tilted flutes ; truth is that a cut-sweep may output a toolpath <> then what a cutting tool would generate; in your case, the problem is keeping the section orientation constant, and my problem was that the section was much smaller in comparison to tool section ... maybe you should ask inside the sw forum
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