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Dangling track (again)

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9件のコメント

  • Brad Levy

    Select the pad that has the dangling track. Then press the N key to select the next item nearby item. If it is a dangling track, press delete to delete it. If it is a regular track, press the N key again to select the next item at the pad. Repeat until you have deleted all the dangling tracks.

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  • Boss .

    Any dangling track within the pad area can be ignored as during manufacture of the copper layer the manufacturer fills all the holes as part of the etch process and drills through the copper so they are not a manufacturing issue.

    I do not, well rarely get any dangling tracks in pads. Do you know when they may be occurring?

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  • Kevin Craske

    Thank you both for the response. Firstly to Brad Levy, I am now able to get rid of the offending dangling tracks. Also thanks to Boss for the information about  they will not affect the manufacturing process. 

    I do like things to look neat and sometimes DesignSpark PCB changes layers when connecting a track to a component when it is not necessary. I like to remove as many vias as possible. Also some routing is not complete or quite how I want it. Thus I like to tidy up and it is then that I may create the dangling track, say when I change the layout of a track and delete the original track which has part of it hidden under a component pad and this part does not get deleted.

    So perhaps I am a bit fussy but DS has allowed me to now have PCB's made which I would never have been able to as no way can I afford other software which meets the spec of DS. 

    I am still learning and thanks to the help from others which I have asked for on not too frequent basis I have a few projects which I am proud of. I now do electronics as a hobby.

     

    .

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  • David Mackay

    I've had this problem in the past, and finally figured out that the Colours ¦ Layers settings can be used to set the symbol pads as not displayed (just change the Yes to No). You can then see all of the dangling tracks, even the very small ones that can be hard to find when a pad covers them...

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  • Gerald Thompson

    Thanks David.  That's the only solution I can concur works for me.  (Using "N" didn't work.)  If it had a shortcut that might make it quicker.  I get a lot of dangling ends when editing existing tracks.  It seems very easy for things to get messy when doing this...  :(

     

    PS - Boss.  A reliable way of making a good mess is to move component after it has had tracks added!  Even if it's a short move it can cause chaos.  I have tried deleting parts of the tracks when I feel reluctant to have to rebuild them completely, then repair them after the move.  Even then it can be fraught with problems.

     

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  • Boss .

    @Gerald, I did what you suggested and did manage after a lot of attempts to get a dangling track in a pad by moving the component. The conditions for me were to set the grid at 100thou and the snap to grid at 1/40th and I then managed a 5thou dangling track.

    What grid and snap to grid settings were you using?
    It may be that if the snap to grid is less than the hole size a dangling track can be left during the component move? I had to move the component many times by the smallest amount to generate this, hence my question on your settings. If we can define the conditions we can ask DS to examine it.

    As for locating the dangling tracks have you tried the Interaction Bar using Goto Error?
    This image shows the result on the left and on the right clicking in the centre of the pad and clicking "N" as the pad is selected first. Apart from removing the DRC check reports, these can be left as reported earlier as all holes are filled with copper during manufacture.

     

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  • Gerald Thompson

    My grid settings are pretty much always less than the size of the smallest drill hole.  For example drill sizes are .038" and greater.  For snap settings I am generally around .01" and then subdivide by half or quarter.  If I make the grid settings coarser it often means I can't place tracks optimally between pads, they often go too close one or the other. 

    BTW many of my components are placed according to strict and specific locations since they have to line up with other existing boards, hence they are not all snapped into position.

    The interaction bar does not help find hidden errors.  I can already see the error text which indicates coordinates if I hover on it.  The N command does not work with hidden dangling bits.  Usually it just hilites the nearest pad.  Some of the dangling errors are actually separate pieces of tracks, created because in order to fix an error I deleted a track, but didn't realise I had not pressed shift to select the complete track.  Then stranded pieces of track are easily left behind, and if they are quite short and under the pad, they are just about impossible to find, short of hiding or moving the pad.  Which is a good reason for a more convenient and less clunky way to hide or control the selectability of parts?  (Rather than having to use the colour menu...)

    Now I could just turn off the other nags like when I move a track and it breaks design rules - even though I am intending to move several more sections before I'm finished with that track.

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  • Brad Levy

    Regarding:

      Now I could just turn off the other nags like when I move a track and
      it breaks design rules - even though I am intending to move several
      more sections before I'm finished with that track.

    Uncheck Tools > Online DRC

    Regarding the dangling tracks:

    I frequently use a fine grid, because some of the boards I design are very small with many components.

    The N command usually does work for me. You may need to press it several times if there are multiple tracks at a location. One case I could see it not working is if you have a large pad, and a dangling track within the pad but not attached to the center of the pad, and you clicked across the center of the pad from the dangling track.
    One way to make it easier to see the dangling tracks is to press C to open the Colors Dialog. Then change the Displayed and Selectable settings in the Pads and Sym Pads columns of the Layer grid from Yes to No. Do the same for the Displayed and Selectable settings in the Layer Spans grid to No as well. (If a setting is selected, double-clicking will toggle it, or you can press Y or N to select Yes or No correspondingly.) Then click apply. This will hide the free pads, symbol pads, and via pads, but leave the traces displayed. Select and delete your dangling tracks (which are now no longer hidden behindt the pads). Then go back to the Colors dialog and change the displayable/selectable settings back to yes.

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  • Neil Wright

    Excellent Brad

    Many thanks, it works a treat.

    Cheers

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