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Manual PCB Construction Question...

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14件のコメント

  • Boss .

    Hi Brian, yes you can, you could just place pads and tracks.
    If you haven't tried the 'Wizards' in the library they would enable you to create the component and would be quite easy and worth getting to know how they work.

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  • Brian McKown

    Hi Boss... thanks for the information.  I have actually worked with bringing stuff in from the various libraries (such as Samacsys) and that worked very well for me.  My current problem, however, involves a couple of odd-ball parts which have no corresponding library items to bring into the schematic.

    Another quick question; after completing my board, many (but not all) of the tracks have the red line running through the center which I assume means that there is a connection problem of some sort (even though it's apparent that the track go where they're supposed to go and there appears to be no conflicts (it's a two sided board). 

    Again, thank you for your help on these matter... any wisdom you can impart would be most appreciated.

    Brian

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  • Boss .

    Hi Brian, you are welcome. Sounds like the wizards are the best option, but you can just place pads, but select them and right click and "Fix" them or you can accidentally move them (advantage of a component is the pads are fixed).

    That normally indicates a connection problem, but from your description of the circuit it sounds unlikely. Can you post an image showing the track between two pad.

    If you place the mouse over the track does the mouse over message make sense? Or right click and look at the properties.

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  • Brian McKown

    Hello again Boss...

    That's kinda what I suspected, but I wanted someone else's opinion before submitting these boards for construction, so I appreciate your input on the matter.  

    Attached is a screenshot of a corner of one of the boards.  Hopefully, the resolution's good enough for you to see the little red line running through some of the traces.  The connections all do seem to mate together properly, 

    Thanks again for your help!

    Brian

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  • Boss .

    Have you changed the colours or other settings?

    It is strange that you have different colour pads, below is a simple connector and free pads and how it appears on my system.

    Through hole pads should be on all layers (hence the same colour). If you launch the Interaction Bar (F9) and select the Layers you can selectively view top and bottom copper layers this may give a clue regarding the pads. Again below is a test PCB view.

    You may have to get support to look at this as they will probably have a better understanding of what may be wrong.

    One other point I noticed is you have files with the ~ symbol at the beginning opened. These are 'security copies' and should not be used directly. You probably opened them by double clicking on them, but my preferred way of using DSPCB is to launch it and then select the file.

     

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  • Brian McKown

    Thanks again Boss.  Yeah... now that I think of it, I assigned the actual pads to correspond only to the layers that their respective traces were assigned to (hence the color differences).  I am really new at this, but to be honest, I have learned quite a bit through the advice of others (such as yourself) as well as simple trial and error experimentation.  I'll keep at it and I'll keep your advice in mind re: how to properly open my files.  Thanks again!

    Brian

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  • Boss .

    You are welcome, the first steps are always the difficult ones. Have a look at the video tutorials, just ignore any references to ModelSource https://designspark.zendesk.com/hc/en-us/sections/202625509-Video-Tutorials

    This is a good introduction https://designspark.zendesk.com/hc/en-us/articles/212623285-First-Steps-Schematic-to-PCB

    I just noticed there are some new ones as well so I'm going to explore them....

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  • Brian McKown

    Hello again Boss.  Here it is Monday morning and back to work...

    On the subject of the color of the solder pads;  I see that each pad's respective color corresponds to the layer that it's been assigned to.  In your demonstration, I see that all of your pads are gray (which to me would indicate that they exist on all layers).  Since I have an abundance of vias in the circuit to do my "though the board" connecting for me, my thinking was that I would simply assign the pads exclusively to the layers that their corresponding tracks exist in.  This is the reason for the different colored pads in my circuit.  Your suggestion that all through hole should exist in all layers makes sense now that I think of it and I plan to re-assign all pads to "ALL" layers.  Again, thank you for your assistance.

    Brian

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  • Brian McKown

    I have another question if you'd be so kind.  Somehow during my trial and error experimentation, I ended up with this little cross-hair symbol on my board.  Any idea how to remove it?

    Brian

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  • Brian McKown

    Regarding the last message, here's a screen shot of the cross-hair.

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  • Boss .

    I'll have to look up how to remove it as I can't remember!

    It is the "Relative Origin" and can actually be ignored as it is only a reference point not a physical part of the PCB.

    It's very useful for placing a pad or component a distance relative to another point, pressing "O" sets it at the cursor or there are other options in the right click menu. If you select another item and press "=" you get a coordinated box, check "rel" and it displays the position or offset from the origin symbol.

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  • Jayx .

    To remove Relative Origin click on Settings->Coords... and untick "Use Relative Coordinates".

     

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  • Brian McKown

    Hello again.  As I continue to familiarize myself with DesignSpark PCB, I have another question pertaining to Gerber files.  I see that there is a process for converting DS PCB's .pcb files over to standardized Gerber files.  That all seems pretty straight forward, but my question is this; because of the relative simplicity of my boards and the fact that I'm using some rather odd-ball components, I went ahead and simply created my boards manually by placing pads and tracks "by hand".  While (for all intents and purposes) everything looks to be fine as far as placemen and spacing goes, I'm still getting a load of DCR errors (like the little line running down that center of tracks).  My fear is that if I convert these boards to Gerber files and send them off to be built, these "errors" are not going to allow the boards to be built!  Forgive me but I'm really new to this stuff... any advice would be most appreciated.

    Brian

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  • Jayx .

    In most cases DRC errors are just an advice, and you can (and sometimes have to) ignore them. But there a few exceptions. DRC stand for Design Rule Check, design rules are often dictated by PCB manufacturer. For example they may say that minimum distance between track and pad is 0.2mm, minimum distance between drill holes is 0.25mm, etc. But in any case you should be able to generate Gerbers, DRC errors can’t stop it. Then you can use for example Eurocircuit online service to check if there are no PCB manufacturing issues with the design.

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