Line type scales in paperspace

I have a drawing in model space that I have set up in 2 paperspace view
ports. One tab is a A4 size at 1:100 scale, the other tab is a A1 at 1:50
scale. Can I make it so that when I plot both view ports that the line
types scales appear correct?

Many thanks

Steve

 

Set PSLTSCALE=1 and LTSCALE at somewhere between 0.3 and 1.0.
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That will cause the linetypes to appear differently in the two differently
scaled viewports. Not what he's looking for, I'd think.
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Can you explain the range , Paul?

 

It boils down to "whatever looks good." In my experience, machine designers
and civil engineers tend to prefer values closer to 1.0, while architects
prefer something smaller. In our shop we use 1/3 in PS (PSLTSCALE=1), 16 in
MS when the plots will be at 1:48, and 32 for 1:96. This gives slightly
"tighter" lines that look good when multiple scales are used.
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OK, but it has nothing to do with the uniformity of appearance in
paperspace....right?

 

Well, yes, it does. Whatever value you use for LTSCALE in conjunction with
PSLTSCALE=1 will have a *uniform* effect on the appearance of linetypes in
all viewports. IOW, if you want the long dash of a centerline (for example)
to be 1/2" long when plotted, and you choose a value for LTSCALE that
produces that length in one viewport, it will appear that way in all
viewports, regardless of scale. All of this, of course, assumes that you
don't mess with the LTSCALE property of individual objects.
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....but with PSLTSCALE=1 and LTSCALE=x
lines in all ports will look one way (and all the same)
and with PSLTSCALE=1 and LTSCALE=y
lines in all ports will look another way, but still all the same. IOW it's
PSLTSCALE that accounts for the similar presentation across
ports ALONE. LTSCALE changes the way lines look but has no effect
on the similarity of presentation in various ports. Right?

 

Right.
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Stephen

If you set the ltscale for all the lines to a scale of 1 and set the
psltscale to 1
doing this in layouts will make all the linetypes display identically

each viewport will scale the display of the linetypes based on the viewport
scale.

Take a look at the the autocad help for PSLTSCALE.

 

With PSLTSCALE=1 the line spacing of objects is adjusted so that they always
appear the same when printed - irrespective of the scale (or more accurately
zoom) of individual viewports within the layout.

With PSLTSCALE=0 line spacing is constant (you effectively set the spacing,
dashes, dots, etc. as a number of units in the drawing) and that absolute
spacing remains the same in all viewports. In this case setting a
linespacing to be 1/2" @ 1:50 will show as 1/4" @ 1:100 or 1" @ 1:25.

Linetype definitions essentialls work by saying you have a line x units
long, followed by a gap y units long and so on untill you get the form you
want. A dashed line might have a dash 2 units long followed by a space of
0.5 units followed by a dash of 2 units followed by.....

LTSCALE is a numerical value that you can set that multiplies the linetype
definitions of all objects within a drawing by. In the example linetype I
gave above setting an LTSCLE of 10 would mean that your dashes were 20 units
long and your spaces 5 units. The relationship between the two stays the
same, it just gets stretched.

Further to this you can set a linetype scale to individual objects. This
linetype scale multiplies the global LTSCALE that multiplies the linetype
definition. Continuing our example you might have a line with our linetype
definition to represent voids in the ceiling above you as short dashes, so
you set the linetype scale of that object to 0.5 meaning that the dashes
would become 10 units (0.5x10x2) and the spaces 2.5 (0.5x10x0.5) units. You
also want a spline to represent your wiring layout. You want this to be
quite long dashes so you set that object's linetype scale to 1.5
producinging a line with dashes 30 units (1.5x10x2) and spaces of 7.5
(1.5x10x0.5).

The way you resolve all of these different settings is really a matter of
personal choice, best solved through trail and error. I personally like to
use PSLTSCALE=0 and LTSCALE=50 and adjust individual objects within that.
The reasons for this are that I only ever tend to work at one scale on a
drawing so PSLTSCALE=0 allows me to view objects on screen roughly the way
they will plot. The global LTSCALE of 50 means that object linetypes scales
are reasonably sensible numbers.

Hope this helps,


DJ

 

Thanks Daniel, but I knew all this. I just got the impression from Paul's
phrasing that he was saying that PSLTSCALE only did what it did with LTSCALE
set within a certain range. Nice explanation, though! ; )

 

Thanks. I've been trying to explain it all to the guys in my new office
(none of whom have used acad before) I think I've finally ot it <g>

Regarding Paul's post, I suggest that his suggestion of an LTSCALE between
0.3 and 1 is similar to my suggesting it at 50: he finds it tend to produce
sensible results.


DJ