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@Steven P It's not required to set any system variable with this routine and I already commented them out if you did not notice that, although it is strongly recommended to have error handle to reset the system variable(s) back once any error take a place.2 points
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Bricscad has 30 day trial and other cad software has the same, like Nanocad, Drafsight used to be free but is very inexpensive.1 point
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Please post the code you have so far and the reference equations you are using for calculating the sag. The equations at this site seem to be straightforward although LISP make make them ugly. Start by calculating x1 and x2 then go on to sag. How do you determine the 1% sag limit with two poles each of different heights and potentially mounted at different elevations?1 point
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Thanks ReMark, of course that was it. For some reason my UNITS setting has been .0000 for distance, 0 for angular. Go figure (hey that was a pun?). Haven't heard from you for a while, hope all is well. I don't do much ACad now that I'm retired. In fact, what I'm doing now is using ACad to layout precise angles for woodworking. I can brag that I'm doing woodworking to 0.0001 degree precision (Ha Ha). Now, if I could only see what I'm doing... Bill1 point