The only time I have seen this is with DXP. It only occurred when junctions
meet, and DXP would remove the junction and allow the wire to pass over the
junction. This may seem minor, except when the junction was the reference
voltage on the +3.3V regulator. Without the junction the +3.3V rose up to ~
+7V and smoked the board, and all its components. When I called Protel, they
said I either needed to turn that "feature" off, or place manual junction at
the intersections. SP2 in DXP and the new Protel DXP did not fix the problem.
They "Protel" could not figure out why I such a big deal about this
non-problem. For it was a feature. To see if this could be your problem,
connect a wire from a component to another component. Connect an additional
wire somewhere along the wire. At the connection point where the blue junction
is displayed, connect a third wire to that connection point. When you add the
third wire, the junction disappears, and the desired connection is no longer.
The two later added wires are transformed into a single wire, which crosses
the first wire, and no connection is made unless you add a manual junction.
Once the "feature" is turned off, a multi-connection is replaced with two
connections at 45 degrees opposite from each other to the common line.
Old Display:
|
----------------o-------------
|
New Display:
\
-----------o--o-----
/
Wrong Display:
|
---------------------
|
I don't have Protel available at home to indicate the steps to turn this
"Feature" off.
Hope this helps!
Allan Overcast
Link Communications, Inc.
www.link-comm.com
Dennis Saputelli <[EMAIL PROTECTED]> wrote:
what is the version ?
what does altium say ?
this is truly unaccepable if it is just as you describe
there is no way that one could or should need to check the gerbers for
missing connections
i have heard of this sort of thing a long time ago, maybe it was ver 3
but have never seen this sort of thing w/ 99SE
knock on wood
ds
_______________________________________________________________________
Integrated Controls, Inc. Tel: 415-647-0480 EXT 107
2851 21st Street Fax: 415-647-3003
San Francisco, CA 94110 www.integratedcontrolsinc.com
Matt Polak wrote:
>
> Hey Gang,
>
> We've come across a *major* show-stopper problem on some boards
> we just got back from our board house. For whatever reason, there are a
> few spots where DXP decided that our vias should just not randomly
> connect to the power planes their nets are assigned to. Most of the
> board is fine, but we've already found one major cluster that's
> problematic. Take a look at this...
>
> http://www.raven-systems.com/temp/missing_connections.gif
>
> As you can clearly see, when viewing the power plane connections
> in the layout editor, the interconnects show fine. When viewing the
> verbatim generated Gerbers, however (RIGHT IN DXP!) there are missing
> plane connections! The entire top set of 7 vias are not connected to ANY
> planes, whilst the bottom row are connected just fine where appropriate.
> I looked at the properties of all of the top-row vias, and they're just
> fine - nothing out of the ordinary. Surprisingly most of the other vias
> on the board (including the bottom row) connect just fine!!
>
> Has anyone seen this, or know of a way to have DXP scan for it,
> or fix it? We just lost a lot of time and money on this
> spin-and-assemble due to this export problem, and I have a feeling we'll
> likely be finding more of these little via issues as we continue to
> bring the board up. And worse yet, we have to do another Gerber
> generation - am I going to have to hand-check several thousand vias on
> the Gerber outputs to ensure this doesn't happen again?
>
> Honestly, this is bringing me to an absolute last straw in
> continuing to use Protel if we can't even be guaranteed consistent
> WYSIWYG output. Someone PLEASE tell me we did something wrong? I'm
> starting to lose patience with Altium's little "features" in the software.
>
> Frustrated as hell,
> -- Matt
>
>
>
> At 07:47 AM 3/16/05, you wrote:
>
>>> Hello All,
>>> I have a PCB design that has several ground planes in it. I
>>> have all of
>>> the ground vias directly connected to the planes. I have all of the
>>> thru-hole components grounds connected using thermal reliefs. If I
>>> look at
>>> the PCB with the internal planes tab selected and with the multi
>>> layer view
>>> option turned off, I see the thermal reliefs.
>>>
>>> When I generate the gerbers using the embedded apertures
>>> (RS274X), most of
>>> the thermal reliefs are gone. This only happens with the power
>>> planes. I
>>> have several polygons in this design and their thermal reliefs are
>>> intact.
>>>
>>> Has anyone else seen this? Does anyone know what I am doing
>>> wrong? Any
>>> information that you can give me will be greatly appreciated. Thank
>>> you for
>>> your time.
>>>
>>>
>>>
>>> John Branthoover :
>
>
>
>
>
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