Re: [PEDA] Polygon ground question

2003-05-31 Thread JaMi Smith
One other thing to note and remember is that, in the absence of any other
specific rules, the Polygon Clearance will default to the default whole
board clearence in effect at the time that the Polygon Plane was poured.

This means that if you change your default clearences for any reason, and
then repour a Polygon Plane, the clearence between the Plane and other
nets will change to the default clearence in effect at the time of the
repour.

JaMi



- Original Message -
From: Madhu Annapragada [EMAIL PROTECTED]
To: Protel EDA Forum [EMAIL PROTECTED]
Sent: Wednesday, May 28, 2003 6:45 AM
Subject: Re: [PEDA] Polygon ground question


 If I read this right, then your solution might be to set your design rules
 right; make sure you have specified a clearance between polygons and all
 other nets. Also make sure you have the polygon track width etc picked out
 right; look at the user manual for some good tips on this topic.
 Regards
 Madhu
 -Original Message-
 From: Miao, Yi-Jun ( [ @ v IAC-N) [mailto:[EMAIL PROTECTED]
 Sent: Tuesday, May 27, 2003 9:25 PM
 To: [EMAIL PROTECTED]
 Subject: [PEDA] Polygon ground question


 Dear sir:
   In placing polygon ground, there always exist some tiny polygon,
 these tiny trace will interfer signal trace.
   I  have 2 methods to deal with this:
  1: dobule click the polygon plane, unlock primitive ,then
 modify the tiny traces.
   The shortcoming is:  If I need rebuild the polygon, I have to
 modify again.
  2: In relative layer(eg TOP layer),route an trace( no
net)
 to keep from the tiny trace, let the tract' s properties is keepout, then
 rebuid the polygon, it will no tiny trace.
  The shortcoming is:  After fulfil these work, I have to delete
 thesekeepout trace, but maybe I need rebild the polygon.
  So I still havn't thought good method to do it. Can you give me
any
 guide?

 Best regards,
 Miao yijun
 Phone:(86)25-2262313 EXT 438
 Fax: (86)25-2267474
 E-mail: [EMAIL PROTECTED]





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Re: [PEDA] Polygon ground question

2003-05-29 Thread Ian Wilson
On 11:25 AM 28/05/2003, =?big5?B?Ik1pYW8sIFlpLUp1biAowVukQLZ2IElBQy1OKSI=?= 
said:
Dear sir:
  In placing polygon ground, there always exist some tiny 
polygon, these tiny trace will interfer signal trace.
  I  have 2 methods to deal with this:
 1: dobule click the polygon plane, unlock primitive 
,then modify the tiny traces.
  The shortcoming is:  If I need rebuild the polygon, I have to 
modify again.
If these small islands (tiny sections of polygons) are disconnected from 
the polygon net they can be removed automatically by selecting the remove 
dead copper option on the polygon pour dialog. Dead copper is sections of 
a polygon that can not connect to a pad or track of the same net as the 
polygon.  This option may help.

 2: In relative layer(eg TOP layer),route an trace( no 
net) to keep from the tiny trace, let the tract' s properties is keepout, 
then rebuid the polygon, it will no tiny trace.
You can place a layer specific keepout.  This is a track or a fill that you 
place on a layer like any normal track, but you then tick the Keepout 
attribute on the fill or track dialog.  Layer specific keepouts are placed 
on the layer you wish to control, they are more specific than something 
placed on the keepout layer.  You can place keepout objects directly from 
the Place-Keepout menu.  Layer spcific keepouts are outlined in the keepout 
colour.  Layer specific keepouts do *not* get produced on gerners.  They 
are not copper even though they are placed on copper layers.

I have used layer specific keepouts to control polygons.

Ian Wilson



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Re: [PEDA] Polygon ground question

2003-05-29 Thread Madhu Annapragada
If I read this right, then your solution might be to set your design rules
right; make sure you have specified a clearance between polygons and all
other nets. Also make sure you have the polygon track width etc picked out
right; look at the user manual for some good tips on this topic.
Regards
Madhu
-Original Message-
From: Miao, Yi-Jun ( [ @ v IAC-N) [mailto:[EMAIL PROTECTED]
Sent: Tuesday, May 27, 2003 9:25 PM
To: [EMAIL PROTECTED]
Subject: [PEDA] Polygon ground question


Dear sir:
  In placing polygon ground, there always exist some tiny polygon,
these tiny trace will interfer signal trace.
  I  have 2 methods to deal with this:
 1: dobule click the polygon plane, unlock primitive ,then
modify the tiny traces.
  The shortcoming is:  If I need rebuild the polygon, I have to
modify again.
 2: In relative layer(eg TOP layer),route an trace( no net)
to keep from the tiny trace, let the tract' s properties is keepout, then
rebuid the polygon, it will no tiny trace.
 The shortcoming is:  After fulfil these work, I have to delete
thesekeepout trace, but maybe I need rebild the polygon.
 So I still havn't thought good method to do it. Can you give me any
guide?

Best regards,
Miao yijun
Phone:(86)25-2262313 EXT 438
Fax: (86)25-2267474
E-mail: [EMAIL PROTECTED]



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Re: [PEDA] Polygon ground question

2003-05-28 Thread Ian Rozowsky
 In placing polygon ground, there always exist some tiny polygon, these
tiny trace will interfer signal trace.

When placing or editing the polygon plane, click on the Remove dead copper
box. This will clear all unconnected copper bits

Ian Rozowsky
RD Director
Centurion Systems (Pty) Ltd.
Box 506 Cramerview 2060 South Africa
[EMAIL PROTECTED]
||Anti-spam - please remove the ** from the e-mail address before sending||
http://www.centsys.co.za




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