automatic routing of jumpers connected to different net classes

   Link for attachments mentioned in previous post:

   http://www.mediafire.com/carrotgarden

user@domain.invalid wrote:

Hello, Eagle Users;

 

Any help is much appreciated --- Please take a look on attachments;

 

GOAL:

 

I need to create wires for the "same logical nets", but with different

withs (power ratings), and route them automatically;

 

For example, say I have +5V and GND nets that feed a high power load as

well as low power signal sense load --- see schematics;

 

SOLUTION:

 

I am trying to solve this by creating an smd jumper that looks like wire

with 2 pins, basically a zero resistance shunt resistor; this shunt

shows up in schematics as a separate component;

 

 

PROBLEM

 

When 2 smd pads of this shunt are indeed connected with a wire, as part

of device package, auto router does NOT rout shunt/jumper at all;

when you create a package without a wire, the auto route just fine;

 

Please let me know:

a) is there a better solution for the original goal

b) what to I do to resolve the problem with current solution?

 

Thank you,

 

John.

<user@domain.invalid> wrote in message

news:gavfha$ig0$1@cheetah.cadsoft.de...

 

  Link for attachments mentioned in previous post:

  http://www.mediafire.com/carrotgarden

 

 

user@domain.invalid wrote:

Hello, Eagle Users;

 

Any help is much appreciated --- Please take a look on attachments;

 

GOAL:

 

I need to create wires for the "same logical nets", but with different

withs (power ratings), and route them automatically;

 

For example, say I have +5V and GND nets that feed a high power load as

well as low power signal sense load --- see schematics;

 

SOLUTION:

 

I am trying to solve this by creating an smd jumper that looks like wire

with 2 pins, basically a zero resistance shunt resistor; this shunt

shows up in schematics as a separate component;

 

 

PROBLEM

 

When 2 smd pads of this shunt are indeed connected with a wire, as part

of device package, auto router does NOT rout shunt/jumper at all;

when you create a package without a wire, the auto route just fine;

 

Please let me know:

a) is there a better solution for the original goal

b) what to I do to resolve the problem with current solution?

 

Thank you,

 

John.

Hi, John

Don't see that anyone else is answering so I'll give it a shot, but I'm a

bit new to Eagle so excuse me if my answer isn't the best one. This is the

way I'd go about it...

Power traces are the ones I run first, and I use power supply symbols so I

don't have wires all over the place in the schematic. The other advantage is

that it is easy to connect and disconnect the symbols.

I'd start by defining classes for all the wire sizes I intend to use in a

project. Just type the word  class  in the command bar in either the

schematic or the board editor, make sure each class meets boardhouse specs.

Now, in schematic editor, connect all signals that you wish to all be of one

size wire. For power, just place the appropriate symbol into the editor and

(important) use the net command to join the symbol to the part pin. This

creates an airwire in the board editor. Continue until you have all items of

the same class connected and they all have airwires. Save your work. Go to

the board editor and click Change and select Class. Click the class wanted,

even if the check mark is already on the desired class setting. Now click

one of the airwires, the whole net will highlight for a moment. Click Info

and make sure all airwires you want for that class really now are of that

class. Now, click the autorouter and leave on only the layer/s you wish to

route this section of this nest onto. Then click the Select button, and then

click the nest airwires, then click the traffic light icon (above the

command bar), don't click the Stop icon accidently. The autorouter will now

route as directed; you can manually tweak the routing, or ripup and draw

temporary wires around areas you don't like where it routed to and do the

select autoroute procedure again.

Now, connect the same symbol previously used, in schematic editor, to the

pins for the next smallest class to be routed to the same net that was

previously routed already. More airwires appear. Set the class for these

airwires, and let it route. Repeat until your smallest wires have been

routed for the net that now has a common signal but differing trace widths.

You're finished with that specific net, time to move on to another one.

Sometimes a symbol is not practical. In that case you have to route a class

before routing another class to the same net. But remember not to connect a

signal to a pin unless you've finished with the previous class for that

specific net, because you have to assign a class to an airwire and when you

click a particular airwire any others belonging to that same net and not

yet routed will get the new class you specify from then on & after!

Ok, it's not fully automatic. Just semiautomatic. But it doesn't require

jumpers, either. I hope this info helps.

RGM, thank you very much, great answer. John.

RGM wrote:

<user@domain.invalid> wrote in message

news:gavfha$ig0$1@cheetah.cadsoft.de...

 

  Link for attachments mentioned in previous post:

  http://www.mediafire.com/carrotgarden

 

 

user@domain.invalid wrote:

Hello, Eagle Users;

 

Any help is much appreciated --- Please take a look on attachments;

 

GOAL:

 

I need to create wires for the "same logical nets", but with different

withs (power ratings), and route them automatically;

 

For example, say I have +5V and GND nets that feed a high power load as

well as low power signal sense load --- see schematics;

 

SOLUTION:

 

I am trying to solve this by creating an smd jumper that looks like wire

with 2 pins, basically a zero resistance shunt resistor; this shunt

shows up in schematics as a separate component;

 

 

PROBLEM

 

When 2 smd pads of this shunt are indeed connected with a wire, as part

of device package, auto router does NOT rout shunt/jumper at all;

when you create a package without a wire, the auto route just fine;

 

Please let me know:

a) is there a better solution for the original goal

b) what to I do to resolve the problem with current solution?

 

Thank you,

 

John.

 

Hi, John

Don't see that anyone else is answering so I'll give it a shot, but I'm

a bit new to Eagle so excuse me if my answer isn't the best one. This is

the way I'd go about it...

 

Power traces are the ones I run first, and I use power supply symbols so

I don't have wires all over the place in the schematic. The other

advantage is that it is easy to connect and disconnect the symbols.

 

I'd start by defining classes for all the wire sizes I intend to use in

a project. Just type the word  class  in the command bar in either the

schematic or the board editor, make sure each class meets boardhouse specs.

 

Now, in schematic editor, connect all signals that you wish to all be of

one size wire. For power, just place the appropriate symbol into the

editor and (important) use the net command to join the symbol to the

part pin. This creates an airwire in the board editor. Continue until

you have all items of the same class connected and they all have

airwires. Save your work. Go to the board editor and click Change and

select Class. Click the class wanted, even if the check mark is already

on the desired class setting. Now click one of the airwires, the whole

net will highlight for a moment. Click Info and make sure all airwires

you want for that class really now are of that class. Now, click the

autorouter and leave on only the layer/s you wish to route this section

of this nest onto. Then click the Select button, and then click the nest

airwires, then click the traffic light icon (above the command bar),

don't click the Stop icon accidently. The autorouter will now route as

directed; you can manually tweak the routing, or ripup and draw

temporary wires around areas you don't like where it routed to and do

the select autoroute procedure again.

 

Now, connect the same symbol previously used, in schematic editor, to

the pins for the next smallest class to be routed to the same net that

was previously routed already. More airwires appear. Set the class for

these airwires, and let it route. Repeat until your smallest wires have

been routed for the net that now has a common signal but differing trace

widths. You're finished with that specific net, time to move on to

another one.

 

Sometimes a symbol is not practical. In that case you have to route a

class before routing another class to the same net. But remember not to

connect a signal to a pin unless you've finished with the previous class

for that specific net, because you have to assign a class to an airwire

and when you click a particular airwire any others belonging to that

same net and not yet routed will get the new class you specify

from then on & after!

 

Ok, it's not fully automatic. Just semiautomatic. But it doesn't require

jumpers, either. I hope this info helps.