Leonard,
That feature is intended to remove 'unwanted' loops in signal traces.
Unfortunately there is no control over what loop or segments it decides to
remove for you. It will usually remove the nearest loop that is not the segment
you just routed, but no guarantees.
Like Dennis said, it is a handy tool for doing clean-up on traces. I as
well usually leave the loop removal turned on when I do majority of my routing
but there are definite instances where it must be turned off. If you forget it
will automagically remove some of your previous painstakingly placed routes or
stitched vias. With stitched vias you can watch hundreds or vias disappear in a
flash if you left the loop removal on while editing the ground net. Been there
done that, but not too often.
There was something else in your comments that rang a bell. You mention
that sometimes when you finish routing a trace the computer appears to be
running very slowly. This is a well know issue with Protel. When it seems that
it is asleep after just routing a trace, it is actually analyzing all of your
net connections. This becomes worst when you have a large number of gnds routed
or gnd polygon pours already in the design. To get away from this problem, it
can become very bad (20 minutes plus , sometimes), in the Explorer Pane on the
left, select "Nets" in the drop down window. Find you GND net, whatever it is
named, select it, click edit and check the hide checkbox. This will hide the
connection rats nest for your GND but it also stops the annoying sleep mode
while it is analyzing the GND net.
Sincerely,
Brad Velander
Senior PCB Designer
Northern Airborne Technology
1925 Kirschner Rd.,
Kelowna, BC, V1Y 4N7.
tel (250) 763-2329 ext. 225
fax (250) 762-3374
-----Original Message-----
From: Leonard Gabrielson [mailto:[EMAIL PROTECTED]
Sent: Tuesday, November 09, 2004 4:45 PM
To: Protel EDA Discussion List
Subject: [SPAM] - Re: [PEDA] Removes tracks by itself! - Email found in
subject
Well, that didn't take long! Yep, that was it. What is that, exactly?
Thanks alot!
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