Florian Steiper wrote:
DJ Delorie wrote:
Has anyone thought about doing a footprint rotating utility?
The problem isn't rotating the footprint, it's that nothing in pcb
expects pads to be other than orthogonal. For example, the gerber
exporter can't plot angled lines with square
DJ Delorie wrote:
Has anyone thought about doing a footprint rotating utility?
The problem isn't rotating the footprint, it's that nothing in pcb
expects pads to be other than orthogonal. For example, the gerber
exporter can't plot angled lines with square corners, it would have to
draw them
Peter,
I don't believe these small segments are due to the autoroute process.
I see them a lot and I've never used the auto-router. I believe they
can occur when:
You add a line containing several segments with snap to pins and pads
turned on. This can put a short ( 1 grid long) segment
Hello all,
I know when I was using an LPKF machine at school I had to watch
the clearance between vias. The LPKF software we had made two
passes around the vias for extra clearances I assume this was to make
it easier to solder. We made 2 layer boards for our class
project. For connecting layers
The biggest problem with home-made boards is the vias, right? What if
you drilled the outer panels with larger holes, so that you could
solder to the inner layers? You wouldn't even need copper on the
unused outer layer, you could just drill it out.
\\
--==
DJ Delorie wrote:
Plus the usual problem of obtaining the thin outer clads, and precise
enough drilling.
Don't forget the chemicals, tanks, protective gloves, resist, photomask
(or equivalent).
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geda-user mailing list
Don't forget the chemicals, tanks, protective gloves, resist,
photomask (or equivalent).
I'm all set on that. I did the two prototypes for the smd challenge
myself, for example, that's 6 mil rules.
But I haven't seen any 0.016 single clad in small quantities yet. Not
that I've been looking
On Oct 3, 2006, at 8:32 PM, John Griessen wrote:
I think the way some of these come into being is faster-than-the-
eye-can-see action sorta-like contact bounce, but it's mouse-
contact-bounce. Sounds like a deviant kind of ball game. But
really, who knows? ?quien sabe? como estan mouse
On Tuesday 03 October 2006 19:05, DJ Delorie wrote:
No fair, now I'm jealous. I want expensive toys too! ;-)
One of the companies I do consulting for
bought that machine. I think their long term plan
is to do prototype boards for people in the Pittsburgh area.
Right now they are just doing
I always wanted one myself. How that I've actually used it, I think
the funds could have been better used on test equipment.
Yeah, I'm just drooling. I'm a tool junkie.
It makes $33, http://www.33each.com , for a single two layer board
look cheap when you consider all of the time you
how about layer registration? If the tolerances are out of whack,
nothing will line up very well.
DJ Delorie wrote:
Don't forget the chemicals, tanks, protective gloves, resist,
photomask (or equivalent).
I'm all set on that. I did the two prototypes for the smd challenge
myself, for
how about layer registration? If the tolerances are out of whack,
nothing will line up very well.
I think if the individual layers are accurate (or at least equally
distorted), lining up the drilled clad shouldn't be a problem - just
add two corner holes, drill them separately on each board,
DJ Delorie wrote:
The biggest problem with home-made boards is the vias, right? What if
you drilled the outer panels with larger holes, so that you could
solder to the inner layers?
Sounds reasonable when you allow for extra area, which is also reasonable for a
start on a product with
my favorite layout guy once explained the notion of datum lines (I think
that's what they are called). Anyway, if you use an arbitrary line
(datum) in the center of your board, and reference all measurements to
it, the tolerances are only from that imaginary 1/2 way point to the
edges. It's
Sounds reasonable when you allow for extra area, which is also
reasonable for a start on a product with low volume, and afford a
re-layout later.
Right. In the photos, the pads that are relevent are larger.
You wouldn't even need copper on the unused outer layer, you could
just drill it
my favorite layout guy once explained the notion of datum lines (I
think that's what they are called). Anyway, if you use an arbitrary
line (datum) in the center of your board, and reference all
measurements to it, the tolerances are only from that imaginary 1/2
way point to the edges.
Since engineering is just the balancing of cost and performance,
another way to look at this problem is to see that many many power supplies can
be made with one layer plus ground plane boards -- 2 layer,
and RF boards need 4 or six layers,
and the rest need one layer,
and slant your design
DJ Delorie wrote:
Don't forget the chemicals, tanks, protective gloves, resist,
photomask (or equivalent).
I'm all set on that. I did the two prototypes for the smd challenge
myself, for example, that's 6 mil rules.
How do you put on your LPI soldermask? Do you use an old turntable
and slant your design choices towards one layer.
In my case, I have a specific space to fill, and it's in a high noise
environment. I need the power planes to avoid noise issues.
But yeah, fitting a design into less layers (like my current RAM
board, which has flood-filled power polys on both
How did you get that pcbpool quote?
I just got one for a 4 layer 50x50mm prototype and it was 143 euro
which is way more than $104. I'd love to get 4 layers for $100!
-DC
DJ Delorie wrote:
I always wanted one myself. How that I've actually used it, I think
the funds could have been better
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