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A Drill Bug or Not!

Dale Peterson

Once in a while I have a need to create a single sided layout. In 16.6, I was able to click “Modify design padstack- all instances” to switch pads over to non-plated holes. Now in 17.2 (S031) you can’t toggle to the unplated option. Even thou there is a pull down arrow to do so. So now my drill chart continues to read plated for a non-plated design. This confuses the suppliers unless I add a note stating holes for the design shall be un-plated. I have no need to build a separate pad stack library to support single sided designs because they are so uncommon for us. It is much easier to just change the setting in the design. I suspect that is a bug due to the re-write of the padstack utility. Please confirm or advise.

Cheers

  • oldmouldy

    For whatever reason, IPC-2581 only has Thru-Pins as Plated, since the new Padstack Editor follows IPC-2581 conventions, it doesn't allow non-plated Thru-Pins. If it is just the drill chart that is of concern, you could edit the "plated" text to "non-plated" once the Drill Chart has been placed. I would suggest "hacking" the DLT file but it looks like PCB Editor will put "non-" in front of whatever the "plated status" value is set to in the DLT file and not allow a specific string for "plated" and "non-plated" to be set. (You could potentially have had a DLT that only output "non-plated" as the plating status if it did)

  • Dale Peterson
    in reply to oldmouldy

    Well I guess I will not use the IPC-2581 output option. Ya, I could edit the text in the table but, it will not stay put. If you update your design with a new thru hole part you have to rerun the chart. Then you need to edit the text again. One thing too which I did not mention. The NC Drill output file states plated in the drill summary at the top of the file as well. It gets this info right for the pad stack. Not from the chart on the fab drawing. You must select an un-plated pad stack library prior to loading in your parts. But guess what, good luck building a thru hole non plated pin from scratch now. You cant do it. I'm able to modify an existing non-plate hole to make plated. But, I can't make a plated non-plated. I'm calling this a BUG! They have have to fix this. Its not right.

    Thanks for your input thou.  .

  • riklee

    Would you accept changing the padstack type from Through Hole to Mechanical Hole which you can then change to unplated for the design pastacks?

  • Dale Peterson
    in reply to riklee

    Not really. If I were to do that I would not be able to connect to them. Mechanical option is for mounting hole, bosses etc.

    Cheers

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