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anxb26 / fritzing

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DIY pdf is not accurate enough for DIY #529

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
This is the simple blinking LED example from the basic 101 course in 
electronics.

It was kinda hard to make it autoroute successfully, but with some help it 
managed.
However the produced PDF is not accurate enough to create a DIY etched board.

Attached, is the .fz file, the .pdf file and an annotated pdf to show where the 
problem areas are.

1. the first resistor R1 is shifted to the right so its pads do not touch the 
copper of the right trace, 
but the copper of other traces.
2. very thin connection between trace to the top connector of the small cap C1
3. almost touching left pad of resistor R3 (GND) and a Vcc trace (very likely 
to create shortcut)

Original issue reported on code.google.com by dirk.van...@gmail.com on 22 Jan 2009 at 11:08

Attachments:

GoogleCodeExporter commented 9 years ago 
We saw something similar to error pointed to in point 1 in Reto's class the 
previous
week but i thought it had been resolved so perhaps this is something new.

Regarding point 2, i can't tell if this is the already reported issue of the 
solder
pads not being large enough.  But in the example you attached, it looks like 
not only
is the pad too small, but also not in the correct position.

Original comment by jenn...@gmail.com on 23 Jan 2009 at 10:39

GoogleCodeExporter commented 9 years ago 
I just took a look at the diy export of the examples and they're all suffering 
from
these issues.  There's lots of traces that should be connected that are a bit 
off.

Original comment by jenn...@gmail.com on 23 Jan 2009 at 12:30

GoogleCodeExporter commented 9 years ago 
It looks like a different bug: so far I have found that the parts that are not 
lining
up correctly have been rotated in pcb view.

Original comment by irasc...@gmail.com on 25 Jan 2009 at 9:24

GoogleCodeExporter commented 9 years ago 
i believe this is fixed r2257, but will keep it open for people to confirm

Original comment by irasc...@gmail.com on 26 Jan 2009 at 2:05

GoogleCodeExporter commented 9 years ago 
Indeed, r2257 fixes point 1 & 2.

Issue 3 is still possible to happen I believe. The keepout of pads (and 
traces?) are not taken into account in the 
autorouter. And thus the chance of creating a short in your circuit is very 
likely.
(See the attachment for another example).

Original comment by dirk.van...@gmail.com on 27 Jan 2009 at 10:37

Attachments:

GoogleCodeExporter commented 9 years ago 
Is the almost-touching bug an autorouter bug (the traces are being routed too 
close),
or an export diy bug (correct traces are being incorrectly positioned by the 
export
function)

Original comment by irasc...@gmail.com on 27 Jan 2009 at 3:32

GoogleCodeExporter commented 9 years ago 
This is a routing bug. The traces also almost touch in the pcb view on the 
screen.

Original comment by dirk.van...@gmail.com on 27 Jan 2009 at 6:17

GoogleCodeExporter commented 9 years ago 
closing the export bug and opening a different bug for the autorouting issue

Original comment by irasc...@gmail.com on 27 Jan 2009 at 11:16