what about the question of octagon vs arcs on the pours?
we use the arcs (without notable problems) for whatever that is worth
they look nice anyway

Dennis Saputelli

Brad Velander wrote:
> 
> Tim,
>         first my observations. I have always found that 45 degree polygons
> are a lot slower than 90 degree polygons at repouring. Since yours is
> completely filled I don't see where 45 degree is doing anything for you.
> Second, rather than using a grid matching the track width, I normally use a
> "0" grid which spaces the tracks according to the track width. Just a couple
> of tips from my experiences.
>         As for your other questions, I have never observed Protel to do any
> gerber optimization for polygons. It will draw the polygon using the same
> aperture as your track width and draw line for line what is in the database.
> There is a setting in the gerber advanced tab that will optimize gerber
> elements for drawing but this is just a distance travelled optimization
> similar to the drill travel optimization in the NC Drill generation.
> 
> Sincerely,
> Brad Velander.
> 
> Lead PCB Designer
> Norsat International Inc.
> Microwave Products
> Tel   (604) 292-9089 (direct line)
> Fax  (604) 292-9010
> email: [EMAIL PROTECTED]
> http://www.norsat.com
> Norsat's Microwave Products Division has now achieved ISO 9001:2000
> certification
> 
> > -----Original Message-----
> > From: Tim Hutcheson [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, September 30, 2002 8:16 AM
> > To: peda
> > Subject: [PEDA] Best settings for polygon fill on signal layer?
> >
> >
> > Hello all,
> >
> > I'm finalizing my PCB for first proto.  Its a 4-layer board
> > w/o internal
> > planes but uses signal layer polygon fill on each layer for
> > the GND, SGND,
> > +15, -15 planes.  My question today is: What considerations
> > need to be made
> > when selecting the polygon fill parameters, relative to the
> > gerbers and
> > photoplotter etc.  I presently am using 13mil track and 13mil
> > gap on 45
> > degrees with octagon surrounds on pads, which gets the
> > computations done
> > reasonably quick and seems to look ok.  Do the gerber routines emit
> > optimized large aperture settings with steps to minimize the photo
> > operations, etc?
> >
> > TIA
> >
> > Sincerely,
> >
> > Tim Hutcheson
> > Institute for Human and Machine Cognition
> > University of West Florida
> > 40 South Alcaniz St.
> > Pensacola, FL  32501
> >

-- 
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