I do a lot of sheetmetal layout & have to rotate my UCS to align with each
piece of a multi sided transition..
what I am thinking is a one step block command that prompts for 3 point ucs
, then prompts for object to make block then switches to world or view UCS
& prompts for insertion point. I know lots of you guys could write this in
less than hour & it would take me a week since I know very little about LISP
programming... any takers? TIA
Rob
I'm not being snotty here, but that also makes it a great beginners'
project.
Why not give it a (long)shot? ; D
I'm sure you'll get help when stuck, and you'll have a new skill....
Doesn't sound rough at all.
Send me a better description of EXACTLY what you're needing and I'll get
something to you. From what I'm gathering from your post, it almost sounds
like you don't need much more than the 'object' option of the UCS command
(which makes me think I'm not properly interpreting your request.)
the most common example is a twisted fitting.. .take 2 square flanges for
example around 2 foot square
looking at them flat in world ucs , move one up (on z axis) a couple feet,
rotate 45 degrees in xy plane, then rotate it 20 degrees on each x & y axis,
now draw triangles with 3d face (these triangles should always go in the
directions that doesn't choke the volume of the fitting )to represent the sheet metal sides of this
transition. (I draw only the inside face of the metal since it will be fit
for corner welding, the outside or metal thickness is irrelevant.)
now to lay out all the pieces to be cut on a cnc laser... I use 3 point UCS
align, then trace over the 3d face with a polyline & writeblock it to a junk
file, I rotate around the fitting with my UCS aligning with each one from
outside looking in & create 8 Blocks, then set my UCS to View or World &
insert all these blocks flat into one view & DXF out to the laser to cut. I
was actually thinking it would be nice if the WBlock box had UCS alignment
options it would cut that work in half,,, but if anyone has any other ideas,
I'd like to hear em... If my description is hard to follow I'd gladly post
a dwf or dwg or email it if desired...
still sound easy? how about a lisp that would take the whole fitting &
produce all the cut files with one click???
ideas?
TIA
Rob
for general unfoldings you should try out my
www.black-cad. It will sove your "twisted problem" too ...
regards
Jochen
"longshot" schrieb im Newsbeitrag
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Certainly. Email a couple of samples.
I wouldn't go that far, but it doesn't terribly difficult, either. As long
as you're not in a super hurry and promise to tell me if you find something
else, I'll give it a try. No promises.............of course, what do you
expect for free? ;)
Hi
"Robert Harrison" skrev i en meddelelse
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Architects still today think that the most advanced feature about programs
like AutoCAD, is the option of having a surface unfolded , to produce the
building as a primitive mesh entity , as done 20 years ago.
Bad acturly, as the idea of unfolding is up against some very conservative
engineers idears .that is about that the only geometrie you must use being a
designer using CAD, is "known geometrics" ; ----- this acturly is a 2D way
of thinking.
So when you get this link as reply, it is becaurse a lot of profesional
think, that surface is what the thing is about.
Now I builded lots of boats with my own software, doing unfolded panels from
single curved surfaces represented as mesh entity, and that acturly work
even projecting nice tradisional wooden boats , on the screen with a lot of
Lisp applications ----------- but with my experience I know, that surface is
the least thing about it ; acturly the structure is much more important, the
structure or framework to place the panels with. Beside ,try being a bit
critic about buildings produced from mesh entity ; where are the core
structure, the floors and walls ?
Is the best and most progressive realy an emty metal tophat, where you need
to build another house within, just to get the floors and walls ?
Surfaces is acturly easy unfolded with a bit Lisp, and AutoCAD offer direct
access to the drawing database , ------ that's from my point of view much
better, than a script like way of placing UCS's , as doing it by calculating
can "unfold" a surface with thoousands of faces in one go. Like what you se
done with the paneling for these boats ;
formatting link
But if structure is the issue, if you want . If you don't want just an emty
mesh entity but the floors and walls in an assembly structure, please check
this ;
Hi longshot,
please send me the file too.
Regards
Jochen
scj.schulz(at)t-online.de
"longshot" schrieb im Newsbeitrag
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