Custom linetype & fillet help

[Nostrum]

Hi guys, 

 

I'm fairly new to autoCAD although have been using the basic functions for a few months. I'm hoping someone can help me here.

 

I'm trying to draw ventilation ductwork onto plans and have an example of what is commonly used in the industry. I am trying to replicate this and make my life easier my minimising the amount of work required every time I need to do a drawing. I've attached an image of what I'm trying to achieve.

 

The question is, I've created a custom linetype which draws the straight lengths of duct with no problems, but is it possible to replicate the bend radius using fillet or similar or will I need to drop a block in and attach each line onto each end for the bend (this is what i'm currently doing now and it is very time consuming)

 

Hopefully that makes sense, and thanks in advance for any help

 

 

[BIGAL]

So you want a repeating pattern there is lots of guys here that have some really good duct stuff, but none of them appear to have that patterning ? They will comment hopefully.

 

From a programming point of view the pattern is reasonably practical to do, but requires purpose written code. There are other problems when looking really close at image around TP's why is inside outside radius not parallel.

 

Ps your image dwg is not perfect missing bits, program would fix.

[CyberAngel]

If you're using a block, you could define the insertion point where the connecting vents would meet if there were no bend. Then use the Apparent Intersect snap to place the block.

 

See the image below. There's a grip (the blue block) where the insertion point goes. The block is in red. I left out the interior lines for clarity. You'd still have to scale and/or rotate the block to fit.

 

Have you tried drawing the vent centerline with a polyline? You can put it on a separate layer and turn it off as needed. It's there if you need to modify the vent location. Once you've placed the corners, you can draw/move the straight sections.

[eldon]

It appears to me that the pattern is not constrained by the TPs, but follows an even spacing along the centre line.

 

I would think that a linetype by itself would be impossible, and that the command MEASURE along the centre line with two sets of blocks, with titivation at the corners.

 

Editing the duct at a later date would not be easy!

[BIGAL]

Nostrum go to the home page and click on downloads there is a duct program there by tzframpton have a look at that as a 1st step,  pattern matching would require a custom program.