LT Scale

[Anonymous]

Justt curious, does anyone have a logical explanation why the autocad
default ltscale is set to half the drawing scale. In school I was also
instructed to use this method. The company I have woked at for 6 years sets
the ltscale to match the drawing scale. It seems to make more sense and we
haven't run into any problems other than adding linetypes like hidden4, etc.

Andrew

[Anonymous]

As far as I know, it's more or less a matter of asthetics. Setting it as
half the drawing scale seems to be a basic industry practice, but isn't a
hard fast rule. You could create linetypes when you need something to stand
out a little better, or you could halve the LTscale, just depends on your
setup.

Bottomline is always the finished product, are you getting out on paper what
you need to? How you get there isn't of the greatest importance, while it
does matter in how fast and efficiently you get to that finished product.

"Andrew" wrote in message
news:7A1D3970E4E2EF3789767E4339EDFDDF@in.WebX.maYIadrTaRb...
> Justt curious, does anyone have a logical explanation why the autocad
> default ltscale is set to half the drawing scale. In school I was also
> instructed to use this method. The company I have woked at for 6 years
sets
> the ltscale to match the drawing scale. It seems to make more sense and
we
> haven't run into any problems other than adding linetypes like hidden4,
etc.
>
> Andrew
>
>

[Anonymous]

I agree with you. It seems to me the practice probably started when ltscale
first became a command and the standard linetypes looked best when ltscale
was set to half the drawing scale. The reason we changed was to make it
easier for people with little or no autocad experience. Its easier for them
to remember and I don't have to try to offer an explanation as to why the
standard is to set it to half.

Thanks for you response,

Andrew



"Jason Wilder" wrote in message
news:2CB31F82E620D253E7659D8D74DFC32C@in.WebX.maYIadrTaRb...
> As far as I know, it's more or less a matter of asthetics. Setting it as
> half the drawing scale seems to be a basic industry practice, but isn't a
> hard fast rule. You could create linetypes when you need something to
stand
> out a little better, or you could halve the LTscale, just depends on your
> setup.
>
> Bottomline is always the finished product, are you getting out on paper
what
> you need to? How you get there isn't of the greatest importance, while it
> does matter in how fast and efficiently you get to that finished product.
>
> "Andrew" wrote in message
> news:7A1D3970E4E2EF3789767E4339EDFDDF@in.WebX.maYIadrTaRb...
> > Justt curious, does anyone have a logical explanation why the autocad
> > default ltscale is set to half the drawing scale. In school I was also
> > instructed to use this method. The company I have woked at for 6 years
> sets
> > the ltscale to match the drawing scale. It seems to make more sense and
> we
> > haven't run into any problems other than adding linetypes like hidden4,
> etc.
> >
> > Andrew
> >
> >
>
>

[Anonymous]

It is a matter of aesthetics as the others have said. Be that as it may, the reason
for the one/half drawing scale, is that the hidden linetype in acad is written to be
1/4" long dash with a 1/8" gap. ANSI (American National Standards Institute)
standard for the hidden line is a 1/8" dash with a 1/16" gap. This is one-half the
size of the ACAD linetype. By setting the LTSCALE to 1/2 DSF, you have Hidden2
which is half the size of Hidden, and HiddenX2 which is twice the size of Hidden.
Larger than that is the Dashed linetype. If you set the LTSCALE to the DSF then to
match the ANSI standard for hidden you have to use the Hidden2 linetype. There is
then nothing smaller, unless you create it yourself.

Probably more information than you needed but that is the background.

Mike Sapp

Andrew wrote:
> Justt curious, does anyone have a logical explanation why the autocad
> default ltscale is set to half the drawing scale. In school I was also
> instructed to use this method. The company I have woked at for 6 years sets
> the ltscale to match the drawing scale. It seems to make more sense and we
> haven't run into any problems other than adding linetypes like hidden4, etc.
>
> Andrew
>
>

[Anonymous]

Thanks Mike. That is exactly what I was looking for. I know this has been
standard practice for many years. I wonder why Autodesk didn't fix the
discrepencies between their standard linetypes and the ansi standard long
ago. That way ltscale would always equal the dwg scale.


"Mike Sapp" wrote in message
news:09C146BB00F1F1054C9D33284F612951@in.WebX.maYIadrTaRb...
> It is a matter of aesthetics as the others have said. Be that as it may,
the reason
> for the one/half drawing scale, is that the hidden linetype in acad is
written to be
> 1/4" long dash with a 1/8" gap. ANSI (American National Standards
Institute)
> standard for the hidden line is a 1/8" dash with a 1/16" gap. This is
one-half the
> size of the ACAD linetype. By setting the LTSCALE to 1/2 DSF, you have
Hidden2
> which is half the size of Hidden, and HiddenX2 which is twice the size of
Hidden.
> Larger than that is the Dashed linetype. If you set the LTSCALE to the
DSF then to
> match the ANSI standard for hidden you have to use the Hidden2 linetype.
There is
> then nothing smaller, unless you create it yourself.
>
> Probably more information than you needed but that is the background.
>
> Mike Sapp
>
> Andrew wrote:
> > Justt curious, does anyone have a logical explanation why the autocad
> > default ltscale is set to half the drawing scale. In school I was also
> > instructed to use this method. The company I have woked at for 6 years
sets
> > the ltscale to match the drawing scale. It seems to make more sense and
we
> > haven't run into any problems other than adding linetypes like hidden4,
etc.
> >
> > Andrew
> >
> >
>

[Anonymous]

Why do you have it set at the scale of that sheet? You are aware that
AutoCAD will do this setting for you?

--
Humpty Dumpty


"Andrew" wrote in message
news:7A1D3970E4E2EF3789767E4339EDFDDF@in.WebX.maYIadrTaRb...
| Justt curious, does anyone have a logical explanation why the autocad
| default ltscale is set to half the drawing scale. In school I was also
| instructed to use this method. The company I have woked at for 6 years
sets
| the ltscale to match the drawing scale. It seems to make more sense and
we
| haven't run into any problems other than adding linetypes like hidden4,
etc.
|
| Andrew
|
|

[Anonymous]

Just in case you did not know this:

Command PSLTSCALE controls paper space linetype scaling.

0 No special linetype scaling. Linetype dash lengths are based on the
drawing units of the space (model or paper) in which the objects were
created. Scaled by the global LTSCALE factor.

1 Viewport scaling governs linetype scaling. If TILEMODE is set to 0, dash
lengths are based on paper space drawing units, even for objects in model
space. In this mode, viewports can have varying magnifications, yet display
linetypes identically. For a specific linetype, the dash lengths of a line
in a viewport are the same as the dash lengths of a line in paper space. You
can still control the dash lengths with LTSCALE.

When you change PSLTSCALE or use a command such as ZOOM with PSLTSCALE set
to 1, objects in viewports are not automatically regenerated with the new
linetype scale. Use the REGEN or REGENALL commands to update the linetype
scales in each viewport.

--
Humpty Dumpty

[Anonymous]

In the case where you are using the PSLTSCALE = 1, with the whole ANSI thing, set
the global ltscale to .5 and scale to paperspace. This will be the same as setting
the LTSCALE to 1/2 DSF.

Mike

Humpty Dumpty wrote:
> Just in case you did not know this:
>
> Command PSLTSCALE controls paper space linetype scaling.
>
> 0 No special linetype scaling. Linetype dash lengths are based on the
> drawing units of the space (model or paper) in which the objects were
> created. Scaled by the global LTSCALE factor.
>
> 1 Viewport scaling governs linetype scaling. If TILEMODE is set to 0, dash
> lengths are based on paper space drawing units, even for objects in model
> space. In this mode, viewports can have varying magnifications, yet display
> linetypes identically. For a specific linetype, the dash lengths of a line
> in a viewport are the same as the dash lengths of a line in paper space. You
> can still control the dash lengths with LTSCALE.
>
> When you change PSLTSCALE or use a command such as ZOOM with PSLTSCALE set
> to 1, objects in viewports are not automatically regenerated with the new
> linetype scale. Use the REGEN or REGENALL commands to update the linetype
> scales in each viewport.
>

[Anonymous]

Thanks for all your replies. I'm not having any problems with the way we
have it set up and I understand the relationship between tilemodes, ltscale,
linetypes,etc. I'm just trying to encourage some discussion as to why the
ltscale set to half the dwg scale has become the standard. Again, I think
it is related to the fact that the linetypes that come standard aren't
correct.



"Mike Sapp" wrote in message
news:C4BBE24861B57ABA6468184FDF4ECE6F@in.WebX.maYIadrTaRb...
> In the case where you are using the PSLTSCALE = 1, with the whole ANSI
thing, set
> the global ltscale to .5 and scale to paperspace. This will be the same
as setting
> the LTSCALE to 1/2 DSF.
>
> Mike
>
> Humpty Dumpty wrote:
> > Just in case you did not know this:
> >
> > Command PSLTSCALE controls paper space linetype scaling.
> >
> > 0 No special linetype scaling. Linetype dash lengths are based on the
> > drawing units of the space (model or paper) in which the objects were
> > created. Scaled by the global LTSCALE factor.
> >
> > 1 Viewport scaling governs linetype scaling. If TILEMODE is set to 0,
dash
> > lengths are based on paper space drawing units, even for objects in
model
> > space. In this mode, viewports can have varying magnifications, yet
display
> > linetypes identically. For a specific linetype, the dash lengths of a
line
> > in a viewport are the same as the dash lengths of a line in paper space.
You
> > can still control the dash lengths with LTSCALE.
> >
> > When you change PSLTSCALE or use a command such as ZOOM with PSLTSCALE
set
> > to 1, objects in viewports are not automatically regenerated with the
new
> > linetype scale. Use the REGEN or REGENALL commands to update the
linetype
> > scales in each viewport.
> >
>

[Anonymous]

ahhhh yes... that would be my guess as well.

--
Humpty Dumpty


"Andrew" wrote in message
news:A33E07DF2EDE1EEA45381DDFAD46FDAC@in.WebX.maYIadrTaRb...
| Thanks for all your replies. I'm not having any problems with the way we
| have it set up and I understand the relationship between tilemodes,
ltscale,
| linetypes,etc. I'm just trying to encourage some discussion as to why the
| ltscale set to half the dwg scale has become the standard. Again, I think
| it is related to the fact that the linetypes that come standard aren't
| correct.

[Anonymous]

On Mon, 7 Jul 2003 09:37:19 -0700, "Andrew"
wrote:

>Justt curious, does anyone have a logical explanation why the autocad
>default ltscale is set to half the drawing scale. In school I was also
>instructed to use this method. The company I have woked at for 6 years sets
>the ltscale to match the drawing scale. It seems to make more sense and we
>haven't run into any problems other than adding linetypes like hidden4, etc.

This is generally because it "looks better on the display".

The dimensions for patterned lines is set out in your local national
technical drawing standards (i.e. ANSI, JIS, DIN, BS, AS, NZS, etc).

Of course outside the US where the metric world exists, there are many
offices that still use a factor of 25 or 12 because they did not have
anyone who understood how LIN files were defined, so they accepted the
default (only) imperial definition files at the time and came up with
the factors. Many do not understand why a factor of 25 or 12 looks
better.

--

Regards,

Ian A. White, CPEng
ianwhite@wai.com.au
WAI Engineering
Sydney 2000
Australia

Ph: +61 418 203 229
Fax: +61 2 9622 0450
Home Page: www.wai.com.au

[Anonymous]

You obviously have your answer, just thought I'd add that at my firm the explanation is even harder, as the "powers that were" in the early days of our use of AutoCAD settled on 3/8 of the intended plot scale as the most aesthetically pleasing. That was so long ago that the out-of-the-box ACAD.lin did not even include the "2" and "2X" variants. The "powers that were" ended up making custom linetypes for just about every non-continuous linetype we use anyway, and set the numbers so that the 3/8 factor works for them as well.

--

David Koch
Member of the Autodesk Discussion Forum Moderator Program

[Anonymous]

I've found (from running psltscale =1 in layouts)
that LTSCALE=0.3 (which is real close to 3/8) is the most effective and
aesthetically pleasing. So 3/8 plot scale with LTSCALE = 0 sounds the best. 1/2
is just a lot easier to calculate

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"David_W._Koch" <
href="mailto:dkoch@ewingcole.com">dkoch@ewingcole.com> wrote in message

href="news:f174f7a.10@WebX.maYIadrTaRb">news:f174f7a.10@WebX.maYIadrTaRb...

You
obviously have your answer, just thought I'd add that at my firm the
explanation is even harder, as the "powers that were" in the early days of our
use of AutoCAD settled on 3/8 of the intended plot scale as the most
aesthetically pleasing. That was so long ago that the out-of-the-box ACAD.lin
did not even include the "2" and "2X" variants. The "powers that were" ended
up making custom linetypes for just about every non-continuous linetype we use
anyway, and set the numbers so that the 3/8 factor works for them as
well.

--

David Koch
Member of the Autodesk Discussion Forum
Moderator Program

[Anonymous]

It may be because they had something in mind way, WAY back, when it all
began, and got stuck with this scaling... Linetype definitions are
(probably) the ONLY thing that haven't changed in the history of acad.

And... used in Mechanical dwgs... the LtScale is NOT good looking at 1/2 of
the plot scale... so you still need to go figure...

[Anonymous]

Ian...
(see my other reply, also)

the PLOT's very similar to the display - so it's not just how it looks -
but also how it prints.

And your metric application makes me cringe in sympathy!

[Anonymous]

We do same as you do. Hidden 3,4, Center 3,4, Dot3,4 do exactly what you
expect without any need to fumble with LTSCALE.

Of course the hardcore cad managers will automate all this by code or by
template, but for those of us who have to "make do" by reverse engineering
and/or theivery from a more orderly office - "our" method works just fine.

[Anonymous]

I've been setting LTSCALE to 3/8 of the annotation scale for years,
because I think it looks best as well.

Matt
mstachoni@comcast.net
mstachoni@bhhtait.com

On Mon, 7 Jul 2003 15:35:56 -0700, David_W._Koch
wrote:

>You obviously have your answer, just thought I'd add that at my firm the explanation is even harder, as the "powers that were" in the early days of our use of AutoCAD settled on 3/8 of the intended plot scale as the most aesthetically pleasing. That was so long ago that the out-of-the-box ACAD.lin did not even include the "2" and "2X" variants. The "powers that were" ended up making custom linetypes for just about every non-continuous linetype we use anyway, and set the numbers so that the 3/8 factor works for them as well.

--

David Koch
Member of the Autodesk Discussion Forum Moderator Program

[Anonymous]

I think most started using 3/8 from reading one of the New Riders Publishing
books way back in version 9. At least I did.

- Jim

"Matt Stachoni" wrote in message
news:allpgv4jh87etokq2fbecc7gjlkfpp9mf0@4ax.com...
> I've been setting LTSCALE to 3/8 of the annotation scale for years,
> because I think it looks best as well.
>
> Matt
> mstachoni@comcast.net
> mstachoni@bhhtait.com
>
> On Mon, 7 Jul 2003 15:35:56 -0700, David_W._Koch
> wrote:
>
> >You obviously have your answer, just thought I'd add that at my firm the
explanation is even harder, as the "powers that were" in the early days of
our use of AutoCAD settled on 3/8 of the intended plot scale as the most
aesthetically pleasing. That was so long ago that the out-of-the-box
ACAD.lin did not even include the "2" and "2X" variants. The "powers that
were" ended up making custom linetypes for just about every non-continuous
linetype we use anyway, and set the numbers so that the 3/8 factor works for
them as well.

--

David Koch
Member of the Autodesk
Discussion Forum Moderator Program
>

[Anonymous]

Typically, I just keep adjusting CELTSCALE until what I am drawing looks
pretty - I can't get it to *ork on continuous lines though....



(teasing - everybody gave all the good answers already...)

--
Craig
"And now for something completely different"...


"Andrew" wrote in message
news:7A1D3970E4E2EF3789767E4339EDFDDF@in.WebX.maYIadrTaRb...
> Justt curious, does anyone have a logical explanation why the autocad
> default ltscale is set to half the drawing scale. In school I was also
> instructed to use this method. The company I have woked at for 6 years
sets
> the ltscale to match the drawing scale. It seems to make more sense and
we
> haven't run into any problems other than adding linetypes like hidden4,
etc.
>
> Andrew
>
>

[Anonymous]

funny, I started using .33 because I thought it looked better then .5.

jack Talsky



"Matt Stachoni" wrote in message
news:allpgv4jh87etokq2fbecc7gjlkfpp9mf0@4ax.com...
> I've been setting LTSCALE to 3/8 of the annotation scale for years,
> because I think it looks best as well.
>
> Matt
> mstachoni@comcast.net
> mstachoni@bhhtait.com
>
> On Mon, 7 Jul 2003 15:35:56 -0700, David_W._Koch
> wrote:
>
> >You obviously have your answer, just thought I'd add that at my firm the
explanation is even harder, as the "powers that were" in the early days of
our use of AutoCAD settled on 3/8 of the intended plot scale as the most
aesthetically pleasing. That was so long ago that the out-of-the-box
ACAD.lin did not even include the "2" and "2X" variants. The "powers that
were" ended up making custom linetypes for just about every non-continuous
linetype we use anyway, and set the numbers so that the 3/8 factor works for
them as well.

--

David Koch
Member of the Autodesk
Discussion Forum Moderator Program
>