quick creation channel on design 2d

[stefanoart]

Good morning, everyone.
for 2d design, I need to create, from one line, a channel formed by offset on two sides, connected (round or square is equal)
I call it channel and it is used in the shoe industry to calculate the tomaia motaggio, leaving the reference.
I would like to automate this tool. Is there a way for you? better vector graphics, being a drawing 2d?thanks to attention
steak

 

[stefanoart]

Bye to all,
I see I have not received many answers,
Maybe I misjudged the question?
Who knows if anyone can help me?
Thank you.

 

[Cristallo]

Try with a dline, but I don't think it keeps the axis in the center.
otherwise do a pline and do the whole and external offset.

 

[stefanoart]

Okay, thank you. Could you please explain to me how you would do that? I currently do internal and external offset, but then I have to pick up the lines, cut them, in short, a long job, I hoped there was a plug in or a faster method.
Thank you.

 

[Cristallo]

Quick? My answer is six months ago...

 

[Tristus]

I do not know at the bottom rhinoceros, but if on rhinoceros you have the possibility to distribute the 2 arches that represent the fittings between the first offset and the second then you could distribute them along the central polylinea between the two, which would act as a trajectory for the command "series". in autocad you could do this way. so you avoid drawing each time the two arches. Of course, there's gonna be a big command, but the job would be a little bit faster than before.

 

[stefanoart]

@cristallo,by rapid I meant the way, not the answer... :@tristus, first of all, thank you, your proposal seems simple to me, but I have not understood well what commands...discuss me, could you give me more info?
Thank you.

 

[Tristus]

with autocad I would proceed in this way:
in step 1 I would build 2 circles to have the bows. search, because if I built the arches then the command "long series trajectory" these would not be distributed exactly and I would be forced to use also the command "extended" to extend the arc along the lines.

with step 2 I would distribute the 2 circles along the trajectory that I designed in red (command "long series trajectory). At this point of the speech I must add that with the command "long trajectory series" of autocad I set the base point in half the distance between the two circles, so autocad makes a further adjustment.

with step 3 I cut the parts that do not need

with step 4 I have eliminated further parts that do not need
It's always a malicious procedure, but at least it avoids you drawing bows every time. it is only about cutting and eliminating.
if on rhinoceros there is a command like the "long trajectory series" of autocad you could try to use it big way with the same procedure to see if it lightens your work.

 

[Tristus]

or, instead of the circles, you could draw the bows directly, but they're a little plentiful arches, which go beyond the lines. this in order to prevent the "series" command from using the "extended" command to extend the part of the arc if it did not come to touch the lines in black.