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Impedance calculator issue
I am using the impedance calculator for a 14 layer PCB, and although I have only roughly set up the stack the data is not too far out. However I am getting a stupid width for a 50R impedance of 22mm....
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A Guide to PCB Material Selection
Materials are critical for manufacturing a reliable PCB. The performance, shelf-life, and cost of a PCB are determined by the materials used in its stackup. Choosing the right materials is essential to...
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Unable to connect trace due to wrong representation of the part
Hello all,I am trying to route my netlist but It won't let me make the connection and I think it is due to it not showing what it really is in reality and I haven't figured out how to do it and would...
View ArticleExporting design outline (as DXF or image?)
Hi Everyone,I would like to export design outline and import that into another environment (easy eda). Is there a way to export design outlline as DXF or image?Best Regards
View ArticleBuried/blind vias stack up for 14 layer SoC design
Hi,I have a question about usage of BB's in a dense design over 14 layers on a 95x95mm PCB. I used an old project that was similar to what I wanted (not designed by me) and it had a stack-up layers...
View ArticlePCB SKILL Find text body center
Hello,How can I find the body center of a 45 degree oriented text in SKILL? This is not the bounding box (bbox) center nor the origin center. I want to rotate text just like in Allegro by...
View ArticlePanning in PCB Designer
Panning was working fine until 17.4-2019 S024, I think. Now when you click the middle mouse button, the pointer doesn't stay in the layout in the position where you clicked. Instead the layout moves...
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Allegro - Tip of the week: Wondering how to see the constraints between any...
Do you want to see how a constraint resolves between two objects?Use Display > Constraint , and then window-select the two objects to obtain spacing resolution. You can select a single object for...
View Articledeleting lines after compose shape
Hi Everyone,I imported a dxf file choosing outline and made some changes by using "compose shapes" option. But ,I couldn't figure out how to delete the lines that are created just after import. The...
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How to export ascii file (.asc) from Allegro PCB ? (ODB++ ?)
Hi AllI have to export ascii format (.asc) like below from my design designed by Allegro PCB to the Fabso I searched it the way to export asc file, there were some data using by ODB++so I installed...
View Articlemove layout to coordinates of 0,0
I imported a DXF file but it was placed in middle of somewhere . I would like to move the left corner bottom to the coordinates of 0,0. Is there an easy way to do it? The corner is also round shape,...
View Articleoutline vs design outline
Hi All,I am new to pcb design and cadence. I would like to ask what the difference is between outline and design outline?Where to use design outline and where to use outline?Regards
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error in creating design outline
Hi, ALL when i using design outline to creat the shape of the board, i found that the upper right part were missing in 3D mode.How to solve this problem???
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Differential Routing Basics You Need to Know
Single-ended signaling refers to transmitting a signal on a trace and then using a common reference for the signal’s return path. When we route a bunch of traces on the board and the ground plane...
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OrCad Capture V17.4-027 Update Schematic fails
I have set up differential pairs in PCB Designer. When I try to update the schematic, I get a dialog box with the correct Objects, New Values and Old Values. I press the Sync button and the Session...
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Allegro - Tip of the week: Sliding vias/clines freely into dynamic shapes
The “Ignore Dynamic Shapes in Etch Edit” variable, when enabled, will let you freely slide vias and clines into dynamic shapes. Without the variable, you will experience “jumpy” behavior at the...
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Constraint Manager Total Etch Length Green Box, Not Value
I'm using PCB Designer Professional, V17.4-027. I have max total etch lengths set in the constraint manager. Some traces show up as values, as they should. This is good. Some show up as green...
View ArticleCan't zoom in and out when using certain hotkeys.
I use hotkeys for pretty much every command I use on a daily basis in Allegro. That said, I've found that when running certain hotkeys/commands, I cannot zoom in or out in the canvas until I finish the...
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How to check via is closed by solder mask or not by using Allegre free...
Dear Team,I am reviewing a layout using allegro-free physical viewer.I told the layout person to close the via using a solder mask.How I would check whether it is done or not using the allegro free...
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Create meshed plane
Hello!I am tasked with creating a meshed plane. Does anyone know if there is an easy way to do this other than creating a lot of small square planes?
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