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PCB Editor Allegro Copper Etch is Highlighted
I am not sure why all the layers have copper etch highlighted and also some pins.
View ArticleAllegro 17.4.030 Hangs after Launch on Windows 10.
For whatever reason, this issue started after I tried to import an Eagle design. What I see and what I've tried:The edit screen appears and then all I see is the little spinning circle.I -can- launch...
View ArticleAllegro - Tip of the Week: Preventing Shorts
It is possible to override a DRC using properties in PCB Editor. Most of the times, we do it on purpose, with a goal in mind. However, we can’t rule out those other times where an oversight might cost...
View ArticleWrite to File without double quotes
When I write a string to file then the string gets written with double quotes. How can this string be written without double quotes?I have played with parseString() and buildString() and couple of...
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Vias in Hatched copper fills
I'm trying to get Allegro to properly connect ground vias to a hatched ground plane. It seems to work sometimes and not others. Comparing designs, I am failing to find an obvious setting to make this...
View Articleunable to do mirror option in OrCAD 17.4
While doing mirror (edit >> mirror) for components getting a error (SPMHA1-247): Illegal mirror flag. in command windowunable to do mirror in orcad 17.4
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error in startup script
I get the this error when I open a project. What might be the reason for that?We moved to one drive environment and there is a space in the file extension after Onedrive.Could it be the reason? We...
View ArticleConnecting solid and crosshatched shapes
Hello,Is there a standard way to connect a solid shape to a crosshatched shape (with both shapes being dynamic) in OrCAD PCB Designer?background:I'm using OrCAD PCB Designer Professional 17.4 for a...
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How to check the violation type differential pad parasitic capacitance by...
Hi everyone,I would like to check the violation type differential capacitance by skill or any tool quickly.It means check cut out reference GND plane underneath the AC pad capacitor.
View ArticlePCB SKILL Update Text Using Comment
I have a bunch of version numbers in my PCB database. I have added a comment property to the version number TEXT in the database. What I would like to do is use SKILL to go through all of the text on...
View Articleconstraint region - defining both single-ended and diff pair widths
I am using OrCAD PCB Designer Pro 17.4. I need to define different constraints for an area that has both single-ended and differential pair nets. I don't see a way to define a physical constraint set...
View ArticleCadence 17.4 axlUIViewFileCreate html not working
Below Code used with 17.4 axlUIViewFileCreate does not display HTML format, but 17.2 works fine.fprintf( logwindow, "<!DOCTYPE html>\n" ) fprintf( logwindow, "<html>\n" ) fprintf(...
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How to use “Quickplace” feature for component placement on your PCB
Quickplace lets you floorplan a design faster in the layout editor. You can add unplaced components to the board design. You place logic-bearing symbols outside the board outline, in either a default...
View ArticleSyntax error while trying to export OrCAD schematic to PCB editor
I am getting the following error while trying to export my schematic to PCB editor.:#1 ERROR(7) Syntax error : string not closedEnd of line inside string in lines 2934-2935How can this be fixed?
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Artwork and NC Drill scaling mismatch
The scaling of NC drill does not match the scaling of other layers artwork. NC drill size looks bigger than the artwork in gerber viewer. What settings I need to change to match scaling of NC Drill...
View ArticleHeads up Display
I'm trying to route some differential pairs in Allegro 17.4 and want to ensure my phase error is less than the specified MAX. Everything I'm reading and seeing online refers to a heads up display that...
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Symbol has extra pin
Hello !I have a really annoying situation here where Allegro cannot load a footprint after importing a netlist. The error is : ERROR(SPMHNI-196): Symbol 'TO254P1524X483-4_3N' for device...
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Cross-section Table Display Question
When I generate the cross-section table for placement (Manufacture->Cross-section Chart->Table), the view that is generated only shows the Primary stack-up as defined in the Cross-section editor....
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Allegro – Tip of the week: Voiding GND clines through GND plane
Here is the method to auto-void GND sense lines being routed through a GND plane. In the following example, a GND net is routed through a GND shape.To achieve this, use the ‘VOID_SAME_NET' property on...
View ArticleIncorrect Via is Being Placed
I have some blind vias in my design. The vias I have in the desing are:1. Default Via 2. Blind via from Top to Layer 23. Layer 2 to Layer 34. Layer 3 to layer 45. Layer 4 to Layer 5 6. Layer 5 to...
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