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Date:	Mon, 11 Sep 2023 12:13:36 -0300
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Subject:	Re: [geda-help] Help understanding messages from auto-router
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From:	"Cam (camfarnell AT bitflipper DOT ca) [via geda-help AT delorie DOT com]" <geda-help AT delorie DOT com>
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Hi Glen,

These are all good points. All the vias on the board were put there by the autorouter, not by me. I expect that, while autorouting, it put down and ripped up lots of tracks and vias as part of the process. My concern was "why is it telling me about dropping these vias" particularly given that the "dropping" messages came AFTER the message "692 of 692 nets successfully routed."

Cheers

Cam

On 2023-09-10 07:20, Glen W. Ruch (gw DOT ruch AT yahoo DOT com) [via geda-help AT delorie DOT com] wrote:
> I can only go on what the English is telling me.  There are two holes too close together . . .
> 
> I would calculate the distances from point (2.27250, 3.58750) to (2.27250, 3.57250).  The holes are on the same axis, and is 0.015 center to center. I would ask myself what is the radius of the two holes?  The sum of the two hole radius(s) would need to be less than their spacing to keep the holes separate.
> 
> Rinse and repeat for  (4.20250, 5.93650)  (4.20250, 5.95150) with it's 0.015 spacing, and (5.75750, 2.99650)  (5.75750, 3.01150)
> 
> It would seem you have four lines repeated, three times.  I'm guessing you have a feature like a jack, header, etc in these locations repeated 3 times on the board.
> 
> I would look at the feature you have at position (2.27250, 3.58750) and ask myself why there are four vias at the /*exact*/ same location.
> 
> And at (4.20250, 5.93650), and also at (5.75750, 2.99650).
> 
> Someone would think one via to be sufficient.
> 
> Again these are only guess based on what the error message is saying.
> 
> Regards.
> 
> On 9/9/23 13:44, Cam (camfarnell AT bitflipper DOT ca) [via geda-help AT delorie DOT com] wrote:
>> Well, having had no response here, I wrote a Python program which reads in the .pcb file, checks all the lines to see who connects to who and which lines connect to pins, then verifies that at the requested nets match what the line, vias and pins actually do. There were no missing vias, so those perplexing messages apparently convey nothing important.
>>
>> But, given the silence here, I suppose the real message is that I should be using pcb-rnd instead.
>>
>> Cheers
>>
>> Cam
>>
>> On 2023-09-02 20:47, Cam (camfarnell AT bitflipper DOT ca) [via geda-help AT delorie DOT com] wrote:
>>> I'm running PCB "version 4.2.2, Compiled on Mar  9 2022 at 23:53:29" on an Ubuntu 22.04.3 LTS machine.
>>>
>>> After running the auto-router on my board, I get the following messages:
>>>
>>> 692 rat lines remaining
>>> 692 of 692 nets successfully routed.
>>> Dropping via at (2272.50, 3587.50) mil because it's hole would overlap with the via at (2272.50, 3572.50) mil
>>> Dropping via at (2272.50, 3587.50) mil because it's hole would overlap with the via at (2272.50, 3572.50) mil
>>> Dropping via at (2272.50, 3587.50) mil because it's hole would overlap with the via at (2272.50, 3572.50) mil
>>> Dropping via at (2272.50, 3587.50) mil because it's hole would overlap with the via at (2272.50, 3572.50) mil
>>>
>>> Dropping via at (4202.50, 5936.50) mil because it's hole would overlap with the via at (4202.50, 5951.50) mil
>>> Dropping via at (4202.50, 5936.50) mil because it's hole would overlap with the via at (4202.50, 5951.50) mil
>>> Dropping via at (4202.50, 5936.50) mil because it's hole would overlap with the via at (4202.50, 5951.50) mil
>>> Dropping via at (4202.50, 5936.50) mil because it's hole would overlap with the via at (4202.50, 5951.50) mil
>>>
>>> Dropping via at (5757.50, 2996.50) mil because it's hole would overlap with the via at (5757.50, 3011.50) mil
>>> Dropping via at (5757.50, 2996.50) mil because it's hole would overlap with the via at (5757.50, 3011.50) mil
>>> Dropping via at (5757.50, 2996.50) mil because it's hole would overlap with the via at (5757.50, 3011.50) mil
>>> Dropping via at (5757.50, 2996.50) mil because it's hole would overlap with the via at (5757.50, 3011.50) mil
>>> Total added wire length = 41.38553 m, 2476 vias added
>>> Congratulations!!
>>> The layout is complete and has no shorted nets.
>>>
>>> Are these "dropping via" messages something I need to be concerned about? Missing vias would be bad. I couldn't find anything in the manual about this.
>>>
>>> Thanks
>>>
>>> Cam Farnell
>>

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