Doubling up tracks on different layers

Michael Sansom wrote on Thu, 01 April 2010 09:24

Guys,

 

I've got a problem I hope someone can help me out with.  I have some

very high current traces on my PCB (15A and 30A).  I'm using 2oz copper

 

but in order to get track widths that aren't completely ridiculous I

need to double up the tracks on two layers.  I'm new at Eagle (last

used

OrCAD PCB editor which is a stripped down version of Allegro) and I

can't seem to make this happen.  When I route the initial track on the

 

first layer naturally the ratsnest for this route disappears (since it

 

is now connected).  Eagle won't allow me to start a track on the second

 

layer because there is no longer an active ratsnest.  How do I get

around this?

 

This is also a generic issue.  If I want to start routing on a pin that

 

the ratsnest currently isn't touching (but it is unrouted, the ratsnest

 

is just terminated on a different unrouted pin) Eagle won't let me.

This is different from Allegro where I could start routing on any pin

and if it was unrouted the ratsnest would immediately snap to that pin.

 

  This is somewhat annoying since it is forcing me to route nets in the

 

order that Eagle decides to snap the ratsnest to instead of routing in

 

the order that is most logical to me.  I'm sure there is a way around

this, but I've yet to find it.

 

Thanks,

 

Michael

I can't help on the first issue, but for the second one, press and hold

ctrl when you are starting your trace and you can start at any location on

the net.

Also, remember, too, you can press down alt as well to use the alternate

grid spacing temporarily.

DAvid

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.

Michael Sansom wrote on Thu, 01 April 2010 09:24

Guys,

 

I've got a problem I hope someone can help me out with.  I have some

very high current traces on my PCB (15A and 30A).  I'm using 2oz copper

 

but in order to get track widths that aren't completely ridiculous I

need to double up the tracks on two layers.  I'm new at Eagle (last

used

OrCAD PCB editor which is a stripped down version of Allegro) and I

can't seem to make this happen.  When I route the initial track on the

 

first layer naturally the ratsnest for this route disappears (since it

 

is now connected).  Eagle won't allow me to start a track on the second

 

layer because there is no longer an active ratsnest.  How do I get

around this?

 

This is also a generic issue.  If I want to start routing on a pin that

 

the ratsnest currently isn't touching (but it is unrouted, the ratsnest

 

is just terminated on a different unrouted pin) Eagle won't let me.

This is different from Allegro where I could start routing on any pin

and if it was unrouted the ratsnest would immediately snap to that pin.

 

  This is somewhat annoying since it is forcing me to route nets in the

 

order that Eagle decides to snap the ratsnest to instead of routing in

 

the order that is most logical to me.  I'm sure there is a way around

this, but I've yet to find it.

 

Thanks,

 

Michael

I can't help on the first issue, but for the second one, press and hold

ctrl when you are starting your trace and you can start at any location on

the net.

Also, remember, too, you can press down alt as well to use the alternate

grid spacing temporarily.

DAvid

--

Web access to CadSoft support forums at www.eaglecentral.ca.  Where the CadSoft EAGLE community meets.