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Lineweights default values - history

AIR_123
Collaborator

Lineweights default values - history

AIR_123
Collaborator
Collaborator

Hi,

 

Could please anyone explain where default lineweights values are coming from? Why such specific? Thx

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Respuestas (14)

imadHabash
Mentor
Mentor

Hi,

 

you can find it from LW  ( LWEIGHT) command . 

 

uuu.png

 

Regards,

Imad Habash

EESignature

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AIR_123
Collaborator
Collaborator

@imadHabash wrote:

Hi,

 

you can find it from LW command . 


Thx, but this is not what I'm asking.

Maybe I should rephrase....

What is the history of the default lineweights values? Thx

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Alfred.NESWADBA
Consultant
Consultant

Hi,

 

>> What is the history of the default lineweights values?

the values were introduced to AutoCAD as a hardcoded list of values ... and that has not changed for decades now.

I'm also not sure why exactly that values, I can only guess the these are some defaults for metric + imperial standards put into one list together.

 

If you want to ask if you can change them, then sorry no.

 

- alfred -

------------------------------------------------------------------------------------
Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ... blog.ish-solutions.at ... LinkedIn ... CDay 2025
------------------------------------------------------------------------------------

(not an Autodesk consultant)
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AIR_123
Collaborator
Collaborator

@Alfred.NESWADBA wrote:

Hi,

 

>> What is the history of the default lineweights values?

the values were introduced to AutoCAD as a hardcoded list of values ... and that has not changed for decades now.

I'm also not sure why exactly that values, I can only guess the these are some defaults for metric + imperial standards put into one list together.

 

If you want to ask if you can change them, then sorry no.

 

- alfred -


Hi Alfred,

Thx for the answer. No, I don't want to change them. I want to know what stands behind this values, why they are so specific. I'm guessing it has something to do with old plotters pens maybe!?

 

Could anyone from Autodesk explain please? Thx

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imadHabash
Mentor
Mentor

Hi,

 

>> why they are so specific. I'm guessing it has something to do with old plotters pens maybe!? <<

as you know LW used for plotting issues and from plot style table editor you could edit and control LW as your need.

 

Imad Habash

EESignature

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AIR_123
Collaborator
Collaborator

@imadHabash wrote:

Hi,

 

>> why they are so specific. I'm guessing it has something to do with old plotters pens maybe!? <<

as you know LW used for plotting issues and from plot style table editor you could edit and control LW as your need.

 


Please read my previous reply. I don't want to edit and control....

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Vinayv4v
Advisor
Advisor

Hi,

 

Just a wild guess

 

Capture.JPG

 

The smallest among the line groups : .25

 

Capture1.JPG

 

Cheers,

Vinay Vijayakumaran

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john.vellek
Alumni
Alumni

Hi @AIR_123,

 

I believe that they are a reflection of technical pens that used to be used for drafting by hand. Any old dog like myself used to have at least one set of pens that ranged from 000 to 4 mm.  (They are still sold today but I can't imagine there is much market for them)

 

When pen plotters came on the scene, the pen sizes were based upon these technical manual ones because one frequently added manually to the plotted drawings.

 

 


John Vellek


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Anonymous
No aplicable

John is correct, they were based on the standard Rapidograph pen set.

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Alfred.NESWADBA
Consultant
Consultant

Hi,

 

>> they were based on the standard Rapidograph pen set

Ever seen in that set a linewidth 1.06mm or 1.58mm or 2.11mm ... or for inch e.g. 0.083"?

Never have seen such pens, not for Rapidograph and also not for pen-plotters.

 

I see that as "just happened in the past" and that's it, I think the guy who built this list first time into AutoCAD will not answer that today.

And to be honest ... I don't know what this info might help anything in the future :cara_guiñando_un_ojo:

 

- alfred -

------------------------------------------------------------------------------------
Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ... blog.ish-solutions.at ... LinkedIn ... CDay 2025
------------------------------------------------------------------------------------

(not an Autodesk consultant)
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AIR_123
Collaborator
Collaborator

Thanks Guys!

 


@Alfred.NESWADBA wrote:

Hi,

 

>> they were based on the standard Rapidograph pen set

Ever seen in that set a linewidth 1.06mm or 1.58mm or 2.11mm ... or for inch e.g. 0.083"?

Never have seen such pens, not for Rapidograph and also not for pen-plotters.

 

I see that as "just happened in the past" and that's it, I think the guy who built this list first time into AutoCAD will not answer that today.

And to be honest ... I don't know what this info might help anything in the future :cara_guiñando_un_ojo:

 

- alfred -


Well does not need to be helping something, but there should be some logic behind it. If this "system" is outdated, maybe it's time to change it!?

The question popped up when developing internal drafting standard. We were not sure if all the lineweights are good for practical use...

And that is how it's brought up, why lineweights are so "strange". Several people had different opinions. So I became very curious... :cara_con_una_leve_sonrisa:

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Alfred.NESWADBA
Consultant
Consultant

Hi,

 

>> If this "system" is outdated, maybe it's time to change it!?

Yes and no :cara_guiñando_un_ojo:

I see all lineweights that are needed exist in that list, there are just more than needed and so I just don't use them,

Modifying that part would need not just a development update for AutoCAD, but also thousands or millions of applications/plugins ... and that's the negative side of changing something very basic.

 

>> We were not sure if all the lineweights are good for practical use...

As mentioned, the ones I don't need I will not use.

 

>> And that is how it's brought up, why lineweights are so "strange"

Yep, I also don't have an idea for the basic reason of some of these lineweights ... and I also would like to have a change if there is a standard lineweight missing.

But the standards are all there, so for me I accepted to have more than needed.

 

- alfred -

------------------------------------------------------------------------------------
Alfred NESWADBA
ISH-Solutions GmbH / Ingenieur Studio HOLLAUS
www.ish-solutions.at ... blog.ish-solutions.at ... LinkedIn ... CDay 2025
------------------------------------------------------------------------------------

(not an Autodesk consultant)
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john.vellek
Alumni
Alumni

HI @AIR_123,

 

I think you will find that since every print device prints slightly differently that the additional pen widths are there to help users get the printed output they desire.  I suggest using the 4-5 weights that match your work process and print properly on your printers.

 

 

Please select the Accept as Solution button if my post solves your issue or answers your question.


John Vellek


Join the Autodesk Customer Council - Interact with developers, provide feedback on current and future software releases, and beta test the latest software!

Autodesk Knowledge Network | Autodesk Account | Product Feedback
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Anonymous
No aplicable

@Alfred.NESWADBA wrote:

Hi,

 

>> they were based on the standard Rapidograph pen set

Ever seen in that set a linewidth 1.06mm or 1.58mm or 2.11mm ... or for inch e.g. 0.083"?

Never have seen such pens, not for Rapidograph and also not for pen-plotters.

 

 

The "original" pen settings were based on rapidograph pen sets, pen numbers 2 thru 7, which at the time started at 0.014" thru 0.036"