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  1. #1
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    Default Choose Scale CenterLine and Hidden Lines wrt 1:100 overall scale

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    Hi Everybody,

    Another problem is that I have a centre line to draw in the middle of 200mm. and 150mm. hollow concrete block walls throughout the plans.

    In Linetypes dialog box, I see CENTRE, CENTRE2, CENTERX2. Furthermore, there is the global scale factor and current object scale. The whole plan will be printed in an overall scale of 1:100 on A4 paper. Is there any principle involved for me to choose among the three linetypes and the input in "global scale factor" and "current object scale".

    I also have a HIDDEN LINE to show unseen canopy and unseen beam above but I see three linetypes for HIDDEN: HIDDEN, HIDDEN2 AND HIDDENX2. Does the scale for Centreline applies the same for HIDDEN lines???

    Thank you in advance, a prompt and detailed answer will be much welcomed.
    Nicolas.

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    Banned Alan Cullen's Avatar
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    Nic, use the CENTRE linestyle, but have LTSCALE set in model space at 1. All plotting should be done in Paperspace. Use viewports in Paperspace. In those viewports set the ltscale at 0.1 (for a plot scale of 1:100). Also set PSLTSCALE to 1. That way it will plot correctly, but as you view it in model space it will not look correct. But if you view it through paperspace it will look correct.

    Get back to us for more explanations, this really is a tricky area of acad for beginners.

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    Quote Originally Posted by Alan Cullen View Post
    Also set PSLTSCALE to 1. That way it will plot correctly, but as you view it in model space it will not look correct. But if you view it through paperspace it will look correct.
    In 2008 if you set Msltscale=1, the linetypes will display properly (according to the Annotation Scale shown while in the Model Tab).

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    Banned Alan Cullen's Avatar
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    Ah yes, Ips. Well done mate. Didn't bother with that, after all, he is using 2006
    But our answers have to cover other members. I keep forgetting that.

    May I now go back and crawl into my hole?

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    oops... these old eyes read 2008, maybe it was his Join Date I read...

  6. #6
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    Default Preliminary Results

    Hi,

    Back to you on the scaling of the center line. I have set the ltscale to 1, chose center (not center2, centerx2). When I switch to "Layout1", I entered new data for ltscale to 0.1 and the line looks just as I wanted it to be. I will bother you again however. I want to understand the principle behind choosing 0.1 for a 1:100 overall plan scale in the layout1 view.

    Supposed it was a 1:50 drawing, what ltscale should I use? Is there any formulae? Or is there a way for ACAD to automatically set all the scale like an automatic configuration? Normally if I have to draw a 10,000mm horizontal line at a scale of 1:100, I enter the whole width of 10,000 unit and at printing time, I enter scale 1:100 but is there a possibility where autocad automatically do the scaling...?

    Thanks,
    Nicolas.

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    Banned Alan Cullen's Avatar
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    G'day, Nic.

    We are getting into a bit of a complex area here, well complex for beginners, but very easy once you get your head around it all.

    On a layout tab (paperspace) you create a viewport. It is that viewport that controls linetype scales. Select the viewport and go to (or type) PROPERTIES. In the properties dialogue, you set the required plot scale under "standard scale". In your case that would be 1:100. Then you set the "linetype scale" to match your plot scale, in your case that would be 0.1.

    Now I have to make some assumptions. Your model space is at 1:1, plot scale of 1:1000. To get the linetype scale divide the plot scale by 1000.

    100/1000 = 0.1

    For 1:500 (viewport "standard scale"):
    500/1000 = 0.5. So in that case the linetype scale would be 0.5

    You may also want to read up in acad help on PSLTSCALE. I normally set that to 1.

    Have a play with all that, and get back to us with any problems.

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