Brian And everyone,
I was just about to post a very similar message.
I'm currently very irritated because I just found a library problem in a
production run of boards....
Please let me know if I did something really stupid or if Prtoel did something
stupid and
I was too naive to catch it.
The problem is:
I made a schematic and converted it to a PCB.
Gripe 1: There are no matching (default) PCB footprints for the
schematic
symbols. This stikes me as really dumb. There should be a
set...
Gripe 2: The schematic symbol for a pot has pin 3 as the tap/wiper.
I never saw this because my pin names were off...
I converted from sch to PCB and applied the generic footprint
VRn - to avoid wiring problems (hah!). That what the whole
point of this
technology is for isn't it!
I checked my transistors for pin problems and found some (but
I guess I had kind of expected a transistor problem. I didn't
expect a problem in something so basic as a VR and time was
short).
The PCB component was correct - pad 2 is (and as far as I
know is
ALWAYS) the wiper. So as far as I'm concerned the schematic
library component is wrong in a dangerous and dumb way.
I can see that it is an extension of resistor but surely
everyone
would get caught by this.
Question: Take the RETSISTOR TAPPED sch library part for eg.
It does not have any hidden pins (according to library params)
yet I have to use display hidden pins to see the pin nums
etc...
Why is this so ?
Question: What is the correct way of assiging schematic pins so they
match PCB pins (how do I make the change and ensure
correctness)
Question: Do I have to create my own compatible sch and PCB libs which
seems really stupid in as "professional" a product as
PCB.
I seem to remember that others have had to make libs too. Do we have a
shared library pool (schematic compatible). I currently don't feel like
trusting protel libs. ISA9000 or not.
Ok so am I being really stupid/naive or is it a serious problem ?
regards
Kim
On Sunday, February 25, 2001 10:05 AM, Brian Guralnick
[SMTP:[EMAIL PROTECTED]] wrote:
> I know it's a waste of space, but I wish that each schematic library
component
> had it's own dedicated footprint as a default, or the option of an external
> footprint, or copy an external footprint to the schematic component's
> default.
>
> OK, I realize that this is exactly how you currently define any current
> component, but all I want is for the schematic component to be connected, or
> part of the same single library name & file for any component.
>
> _____________
> Brian Guralnick
>
> << File: ATT00002.htm >>
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