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05-18-2009 08:47 PM

Hi all,

I found out in SE 2D drafting after I draw so many line, trimming is very slow...sometimes

it causes the SE crash...

I attached a sample file..

any info how to handle this??

rgrds

Puspo

3 REPLIES

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05-19-2009 04:37 PM

467 lines @ 4 Degrees of Freedom (DOF) each = 1868 degrees of freedom

44 arcs @ 5 DOF each = 220 DOF

21 circles at 3 DOF each = 63 DOF

Total DOF in system = 2151

There are 974 constraints and 103 Dimensions in the file.

The system is solving 2151 equations each with 2151 unknowns.

The problem in this case of overuse of constraints, which is placing an

overburden on solve. To see this, turn off Maintain Relationships. Draw a

line and trim it. It will trim quickly.

My suggestion is to simplify the constraint system. Instead of trimming all

the vertical lines, which adds many connects and other constraints. Use a

combination of layers for the components you want to draw and fill them with

the background color to cover the lines of the other components. For example

use fill in the horizontal pipes to cover the vertical lines. this will

greatly reduce the number of objects and constraints. You will need to put

the vertical components on another layer so that you can turn them off to

fill the horizontal pipes. I can provide an example if needed.

This is a perfect example of something that is easy to model in 3D and

generate drawings from using 3D Solid Edge. You will not see the same

performance problems.

Regards,

Rick B.

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05-22-2009 04:15 AM

Ricky,

thnks for your response..Ihave tried to turn off maintain relationship, but the

performance still slow,

if it is ok with you, I will be very thankful if you send me the example file you

mentioned blow,

thanks,

Puspo

"Ricky Black"

>Your file has the following:

>

>

>

>467 lines @ 4 Degrees of Freedom (DOF) each = 1868 degrees of freedom

>

>44 arcs @ 5 DOF each = 220 DOF

>

>21 circles at 3 DOF each = 63 DOF

>

>Total DOF in system = 2151

>

>

>

>There are 974 constraints and 103 Dimensions in the file.

>

>

>

>The system is solving 2151 equations each with 2151 unknowns.

>

>

>

>The problem in this case of overuse of constraints, which is placing an

>overburden on solve. To see this, turn off Maintain Relationships. Draw a

>

>line and trim it. It will trim quickly.

>

>

>

>My suggestion is to simplify the constraint system. Instead of trimming all

>

>the vertical lines, which adds many connects and other constraints. Use a

>

>combination of layers for the components you want to draw and fill them with

>

>the background color to cover the lines of the other components. For example

>

>use fill in the horizontal pipes to cover the vertical lines. this will

>greatly reduce the number of objects and constraints. You will need to put

>

>the vertical components on another layer so that you can turn them off to

>

>fill the horizontal pipes. I can provide an example if needed.

>

>

>

>This is a perfect example of something that is easy to model in 3D and

>generate drawings from using 3D Solid Edge. You will not see the same

>performance problems.

>

>

>

>Regards,

>

>Rick B.

>

>

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05-22-2009 11:07 AM

Open the attached UseLayers.dft file. First investigate what I have done

with geometry on layers. I put the horizontal geometry on the layer named

'Horizontal'. I put the vertical geometry on the layer names 'Vertical'. I

did this to help me manage the geometry.

You need to use 'Customize Quick Access Toolbar' and add commands with 'More

Commands...'.

Change the combo box in the Customize dialog to Modify.

Add 'Bring to front', 'Send to back', 'Pull up', 'Send down'.

These commands work to change the display order of objects. Anything on top

of another object is displayed after what it is on top of.

I have created geometry to represent horizontal and vertical bars. Currently

the horizontal bars are on top of the vertocal bars. The geometry is not

trimmed. If you modify the dimensions, the horizontal bars still cover the

vertical bars.

To make the vertical bars cover the horizontal bars, it is a simple task.

Hide the horizontal layer. You will see only the geometry for the vertical

bars. Fence select all the geometry. Click on the 'Bring to front' command

that you added to the Quick Access toolbar.

Show the horizontal layer. The vertical bars will now cover the horizontal

bars.

Play with some to get the idea of how I organized the geometry.

Regards,

Rick B.

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