Colin,
Bow and twist cannot be predicted from board thickness or planar
dimensions. Bow and twist are results of complex interactions of layup
grain orientation, board materials, copper densities, press temperature and
pressure, hold temperature and time, cooldown rates, etc, etc.
Certain pr
Folks,
Is there a method of determining the maximum permissible size of two board
types?
a) A SMT PCB containing Fine pitch QFP devices
b) A SMT PCB containing PBGA 388pin 1.27mm pitch & Fine pitch QFPs
with respect to Bow and Twist.
I am interested in how the thickness of the board relates to
i meant to say
> it DOES seem to correct itself but I haven't figured out the
> mechanism
not 'it doesn't'
ds
--
___
www.integratedcontrolsinc.comIntegrated Controls, Inc.
tel: 415-647-0480
no good reason other than inertia and the particular methodology I use
but that notwithstanding the problem I mention is not peculiar to
netlist loading, I believe it is to any process in which it pops a
window which has the drop list of currently loaded or recently used DDBS
such as when choosin
Brad
I have tried "keepout arcs" on the same layer as the polygon.
Bob
Brad Velander wrote:
> Hi all,
> one of our engineers just stumped me with a question regarding using
> arcs in a polygon outline. Has anybody ever found a method to better control
> arcs when drawing polygon outl
thanks for the suggestion about putting some text inside the cutout
area. one thing i tend to forget is that people do actually look at the
gerbers. i get in this mode where i think all they do is blindly submit
them to a machine and a pcb comes out the other end. i'll make a
readme file too.
Sorry that was Jim, "Geoff" and Linden.
Brad Velander,
Lead PCB Designer,
Norsat International Inc.,
#300 - 4401 Still Creek Dr.,
Burnaby, B.C., V5C 6G9.
Tel. (604) 292-9089 direct
Fax (604) 292-9010
website www.norsat.com
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* To post a
ian said:
> BTW - Mike, either you are not doing many PCBs or you are much more
> comfortable with Protel and PCB manufacture in general. I recall you
> thinking not so long ago, when you started in this game, that it was all a
>
> bit of a nightmare. Congratulations.
> * * * * * * * * * * *
Thanks Jim, Ian and Linden,
nope I was really hoping there was a conversion utility for polygon
outlines.
I just never use arcs enough to have a handle on them yet but they
are just the biggest pain to deal with since they may add a straight track
and then an arc smaller then desir
If you make the Electrical Grid 'Range' smaller (in Board Options) you may
be able to snap to the center of the pad and not the underlying polygon
tracks.
> -Original Message-
> From: Kirk Haderlie [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, 19 July 2001 1:43 AM
> To: 'Protel EDA Forum'
> yes we have. We know how to do the arcs within a polygon outline,
> but it is another thing to control them or otherwise modify them from
> whatever they seem to feel like doing on their own. (i.e. they seem to be
> limited to only 90 degrees, appear when they want appear, quite often they
> wan
Do you have an Esoniq on-board sound chip? Go to creative lab's web site and download
the updated driver if you do.
_
Brian Guralnick
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, July 18, 2001 6:46 PM
Subject:
Can you please post your listed IRQs at boot up & within NT.
_
Brian Guralnick
- Original Message -
From: <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Wednesday, July 18, 2001 6:46 PM
Subject: Re: [PEDA] Pregnant pauses!
| This was addressed a co
Brad,
Which layer are you trying to place the arcs on?
I have used arcs in polygons on mechanical layers (to generate a
cross-hatch pattern indicating application of sealant, etc.) but had
problems doing it. I experienced difficulty in controlling them as well.
The work around that
This was addressed a couple of weeks ago, and its taken this long to get my
IT dept to look at it. I remember that USB interrupts were one of the causes
which I suggested to the IT people. Unfortunately, I am using a Dell
Optiplex GX1 P3-450 384M RAM, on-board video and Windows NT 4.0. There is no
On 04:39 PM 18/07/2001 -0500, Robison Michael R CNIN said:
>thanks peter,
><..snip..>
>
>hmm... i've got an idea now. i went to tools/preferences/display/
>and selected single layer mode and went thru the various layers
>and the mechanical4 is the only layer which displayed the army-
>green board
Hey, folks, please delete the extra stuff at the bottom of your message
when you reply!
At 05:03 PM 7/18/01 -0400, Jeff Adolphs wrote:
>Thank You!
>When I tried moving the files to a new directory the .ddb file did not
>recognise the new file names.
>I deleted the .ddb file, tried to open the .p
Robison Michael R CNIN wrote:
>
> thanks peter,
>
> recently we acquired some gerbers for a board that had a hole in it
> that was used as a handle. i tweeked some of the silkscreening
> and sent it off to advanced circuits and they produced the board with
> no problem. i did call them and ask
thanks peter,
recently we acquired some gerbers for a board that had a hole in it
that was used as a handle. i tweeked some of the silkscreening
and sent it off to advanced circuits and they produced the board with
no problem. i did call them and ask if they could do irregular holes
(not pads)
no no
see my message today "caution"
I have experienced problems with this method you describe many times
these problems are not immediately obvious
i suggest to start a new ddb and drag files in there for revision
or tuck them in a folder of the current ddb
Dennis Saputelli
"Jaurique, Brad" wr
At 09:07 AM 7/18/01 +0200, Edi Im Hof wrote:
Place a pad (on grid) outside of your set of components and select it also.
Then this pad will be on one of the four corners of the movin box and you
can use it sa an "on grid anchor".
The problem the user was having is probably related to a bug that
Thank You!
When I tried moving the files to a new directory the .ddb file did not
recognise the new file names.
I deleted the .ddb file, tried to open the .prj file which created a new
.ddb file.
For the PCB directory: I tried to open the .pcb file which created a new
.ddb file. The old .ddb
fil
Robison Michael R CNIN wrote:
>
> hello,
>
> i've never had to place an irregular shaped hole in a board before,
> and i can't figure out how to do it. i looked up "drill," "hole", and
> "irregular" in the help and had no luck.
>
> its essentially an elongated circle. i kinda figure that it i
Jim,
yes we have. We know how to do the arcs within a polygon outline,
but it is another thing to control them or otherwise modify them from
whatever they seem to feel like doing on their own. (i.e. they seem to be
limited to only 90 degrees, appear when they want appear, quite often they
Brad,
Have you tried hitting the space bar to toggle modes as you place the polgon?
Jim McGrath
CAD Connections Inc.
Brad Velander wrote:
> Hi all,
> one of our engineers just stumped me with a question regarding using
> arcs in a polygon outline. Has anybody ever found a method to bet
Hi all,
one of our engineers just stumped me with a question regarding using
arcs in a polygon outline. Has anybody ever found a method to better control
arcs when drawing polygon outlines? It seems that you can only get an arc if
you want 90 degrees and it happens to want to put the arc t
Hello! What's the best way to start a new revision of PCB and Schematics in
Protel 99SE?
Thank You in advance,
Jeff Adolphs
Lake Shore Cryotronics, Inc.
www.lakeshore.com
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* To post a message: mailto:[EMAIL PROTECTED]
*
* To leave this l
I just got burned again on something I knew but forgot
re SP6 (and earlier)
Things get screwy if you move a ddb to a different directory or copy to
a new filename, etc.
In my case I moved L146A.DDB to a new sub.
Later I rev'd the schematic, made a new netlist, stepped the pcb to PCB3
(from PCB2
hello,
i've never had to place an irregular shaped hole in a board before,
and i can't figure out how to do it. i looked up "drill," "hole", and
"irregular" in the help and had no luck.
its essentially an elongated circle. i kinda figure that it involves
perhaps placing some lines and arcs on
After Looking closer at the issue, I realized I have polygon fills in the
selection that cross the center of all the component pads. When clicking on
the center of a pad I was not selecting the pad but the polygon fill, thus
my anchor point was the polygon fill. If I use a via placed in the poly
Paul Gaastra wrote:
>
> Hello. I'm running Design Explorer 99 Spack 6.
>
> I don't make many boards. It seems that every time I create a new
> PCB from a schematic one component gets placed with the text
> information way away from the footprint. The text information is not
> visible. I know
Thank you, Konrad, that's a nice work-around.
Gisbert Auge
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* http://www.techservinc.com/protelusers/leave.html
* - or email -
* mailto:[E
>
>Just dubble click on the blue title bar of the window to maximize it.
>Easier than to finde the maximize button.
>
A little shortcut that I didn't know about before!
Certainly easier than searching for a tiny button. Thanks Edi.
I too have wondered about getting DDBs to open maximised but I
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