AutoCAD 2000 – How to create wavy line indicating a truncated view of an obect

[GreensandsParticipant @greensands]

Hi all – I am currently using AutoCAD 2000 for my 2D drawings would like to be able to insert a wavy line (similar to a sine wave) as commonly used to indicated that only a small proportion of  a disproportionately long object is being displayed. Initial thoughts centred on using the Polyline feature but I cannot get it to deliver the required results. Any advice would be most welcomed.

[David JuppParticipant @davidjupp51506]

Web search on ‘AutoCAD 2000 broken view’ suggests that BREAKLINE command may be what you need.

[David JuppParticipant @davidjupp51506]

Web search on ‘AutoCAD 2000 broken view’ suggests that BREAKLINE command may be what you need.

[GreensandsParticipant @greensands]

I have attached a hand drawn example of the ‘wavy line’ symbol indicating a truncated object which I would like to be able to reproduce using AutoCAD 2000.

[Michael GilliganParticipant @michaelgilligan61133]

It appears that the ‘problem’ is that AutoCAD does not support that ‘curvy’ convention, but instead uses the jagged breakline.

MichaelG.

[Michael GilliganParticipant @michaelgilligan61133]

This may [with the usual AI caveats] help explain

.

.

MichaelG.

 

[Greensands]

On Greensands Said:

I have attached a hand drawn example of the ‘wavy line’ symbol indicating a truncated object

What you are looking for is called a ‘pipe break symbol’. As above, a search suggests the BREAKLINE command, using a block, is one possibility.

What you have drawn in your own sketch is incomplete in those terms as the convention is to use three arcs.

If you only want two arcs, and there is an automatic way of doing it, you would have to delete one of the ‘factory’ items after insertion.

For what it is, two arcs meeting on the centreline of the object, would it not be simpler just draw to them thus as two individual entities?

You only need to do this once per drawing as you can then copy and scale them thereafter.

[Alan CharlestonParticipant @alancharleston78882]

Hi,

Not sure about autocad, but in DeltaCad I made the wavy line using the spline function. I make the first point of the spline at the end of one side of the pipe, the second 1/4 of the way across and the same distance beyond the end of the pipe, the third 1/2 way across flush with the end of the pipe, the fourth 3/4 of the way across and the same distance before the end of the pipe and the fifth at the end of the other side of the pipe. This will give a wavy line across the end of the pipe as shown in your drawing.

I presume Autocad lets you draw splines.

It’s a shame DeltaCad bit the dust. It was the easiest drawing program to use if you had learnt to do technical drawing on paper. When all is said and done, all you really need to do is draw straight lines (vertical, horizontal and angled), circles around a given centre, splines for ellipses and to dimension the finished drawing. Everything else in Autocad only makes things quicker while making them too complicated to use.

Regards,

Alan C.

[JasonBModerator @jasonb]

Not good to actually draw the part broken as how do you dimension it when the dimensions on a 2D drawing are derived from the part.

If it is anything like Alibre then create the part full length so it can be changed at any tiime and looks right in an assembly. THEN when producing the 2D drawing look for a “broken” or similar option. Alibre does give a few options for the form the break lines take but it only does round objects like Greensands sketch not the correct way that should show the “cut” edges if a round item.

This is a 1000mm long part broken to fit an A4 sheet and the unbroken one below, red is how it really should be shown for round items

 

[Alan CharlestonParticipant @alancharleston78882]

Hi Jason,

Again not sure about Autocad but in DeltaCad the part would be dimensioned in the normal manner and then edited to the correct value.

Regards,

Alan C.

[Author]

Posts