I just tried to fool Protel into converting it's trace ends from arcs to squares by
modifying an ASCII Protel file. Guess what happened, Protel converted the tracks to
fills on load. Though it didn't do such a bad job, all 45 degree angle tracks were
totally messed up. I guess this is why Protel does not offer the square end tracks in
the first place.
About the Gerber import. For this same potential bug, Protel breaks up the lines into
many elements though it does not have to. When making my SPIRAL.BAS, I discovered the
Gerber pen up & pen down. When importing my spirals, Protel broke them up into all
the elements even though I properly controlled the pen from the beginning to the end.
I'm going try to make another mod to see what happens.
_____________
Brian Guralnick
----- Original Message -----
From: "Brad Velander" <[EMAIL PROTECTED]>
To: "'Protel EDA Forum'" <[EMAIL PROTECTED]>
Sent: Wednesday, June 13, 2001 5:50 PM
Subject: Re: [PEDA] Microwave PCB layout
| Brian,
| more on our (my) methodology. Typically we import DXF or Gerber from
| our RF design/simulation tools. I prefer DXF because Gerber typically has
| too many individual drawn elements making up everything. I then use the DXF
| as a template and duplicate the circuit using traces where applicable and
| fills where square ends are required or the copper element is square or
| rectangular.
| Using the DXF I can usually pop the curved line portions to the
| conductor layer and don't have to enter the curves through Protel. Then I
| can attach a regular trace to the end of curve for a perfect match. The DXF
| rectangles and squares typically come in as fills (unless they are rotated)
| and again I pop them onto my conductor layer. The fills which are rotated
| come in as outlines or a polygon type outline and I will carefully replace
| these with rotated fills on my conductor layer, using the original as my
| guide.
|
| 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
|
|
| > -----Original Message-----
| > From: Brian Guralnick [mailto:[EMAIL PROTECTED]]
| > Sent: Wednesday, June 13, 2001 2:08 PM
| > To: Protel EDA Forum
| > Subject: Re: [PEDA] Microwave PCB layout
| >
| >
| > The most annoying thing about this is that if you make a PCB
| > with the rounded ends, make the gerbers, edit the circles to
| > rectangles in the apertures in beginning of the Gerber file,
| > import the Gerber file into a new PCB, you will have the
| > square ends which you want.
| >
| > _____________
| > Brian Guralnick
| >
|
|
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