Couple More Eagle Questions

  1. Once you run the autoroute is there a way to make it run again? I moved some things and clicked it again and it didn’t do anything. I know, everyone says to do it manually.

  2. I what to etch a graphic on my board since it will be a home brew board and no silk screening. Is there a way to import a graphic either eps,dxf,bmp, rastor or vector format into the program and have it etched instead of silkscreen.

  3. Is there a dedicated forum for eagle anywhere?

[1] You need to rip-up the tracks you want it to re-route. It will only reoute airwires, so if you use the rip up tool on existing tracks they will turn back into airwires and it can go for it. You don’t have to rip up the whole trace either, you can just do sections of it.

[2] run → import-bmp.ulp

[3] This forum is probably the best I’ve come across, but I’m sure there are others to be suggested…

  1. As far as I know, No. I think you are screwed at that point, and I’m not sure what it is that makes Eagle give up.

  2. I believe there is a way, and I read the answer a little while ago, but can’t find it now. I’m sure someone else will be able to answer this.

  3. The only specific one that I know of is the Eagle news group. It’s not a web forum, so you’ll have to access it through a newsgroup reader.

news://news.cadsoft.de/eagle.support.eng

barkster:

  1. Once you run the autoroute is there a way to make it run again? I moved some things and clicked it again and it didn’t do anything. I know, everyone says to do it manually.

The autorouter will attempt to route any air wires.

If there are none the autorouter has nothing to do.

barkster:
2. I what to etch a graphic on my board since it will be a home brew board and no silk screening. Is there a way to import a graphic either eps,dxf,bmp, rastor or vector format into the program and have it etched instead of silkscreen.

Yes, there are ULP tools to import graphics.[See this thread

barkster:
3. Is there a dedicated forum for eagle anywhere?

Yes. Several, but the motherlode is this newsgroup.](http://forum.sparkfun.com/viewtopic.php?t=13417)

Trialex beat me to it, but as far as air-wires, on the last board I tried to autoroute, just for a lark, Eagle left plenty of air wires untouched and would not even try to route them no matter what I did. Maybe there’s a routing limit on the free version or something?

an easy way to ripup every thing is to group select the entire board and then right click the group with the ripup tool selected.

TheDirty:
but as far as air-wires, on the last board I tried to autoroute, just for a lark, Eagle left plenty of air wires untouched and would not even try to route them no matter what I did. Maybe there’s a routing limit on the free version or something?

The EAGLE autorouter is not crippled on the free version.

The autorouter can only route successfully within

the rules given. It will reach a point of either 100%

complete or stalling when there is no escape from

a trap.

Correct mechanical placement and orientation of

the components using the airwire ratsnest is critical

with any autorouter application. This skill comes from

experience, and newbies trying to avoid the work

often run the autorouter too soon in the design

process and fail.

Wow, thanks for all the quick replies. That should get me going

There will soon be a forum for eagle, I just purchased www.cadsofteagle.com and will install BB on it tonight. If anyone wants to be a moderator or help with topics let me know. I was thinking of a support, help, tutorial, projects, gallery BB

bigglez:

TheDirty:
but as far as air-wires, on the last board I tried to autoroute, just for a lark, Eagle left plenty of air wires untouched and would not even try to route them no matter what I did. Maybe there’s a routing limit on the free version or something?

The EAGLE autorouter is not crippled on the free version.

The autorouter can only route successfully within

the rules given. It will reach a point of either 100%

complete or stalling when there is no escape from

a trap.

Correct mechanical placement and orientation of

the components using the airwire ratsnest is critical

with any autorouter application. This skill comes from

experience, and newbies trying to avoid the work

often run the autorouter too soon in the design

process and fail.

Mine gave up pretty quickly, when there was definitely clear paths to go. I’m going to give it another try on an old project, rip it up and see how far I can get it to go. If it’s not going any farther I’ll post it and see what I’m doing wrong, because I could swear it gave up way too easily. I even tried changing the routing grid. I changed the routing grid to 1 mil, and even though it took a very long time to complete, it didn’t get any better results.

Okay, so here’s an example. I should have removed the polygon, but I didn’t think it would matter.

The one on the left possibly won’t route because there’s a ground that is routed between it, but the one on the right… the pin should be connected to that pad. They are both on the same layer and there is obviously nothing between them. No matter how many times I select autoroute it will not connect that up. Is there something in the setting that could effect this? I’ve gone through the settings a few times and can’t see anything stopping those two from connecting. There’s no limits that I can see that would stop a signal so close and on the same layer from connecting.

http://www.higginstribe.com/temp/air-wire.png

barkster:
There will soon be a forum for eagle, I just purchased www.cadsofteagle.com and will install BB on it tonight. If anyone wants to be a moderator or help with topics let me know. I was thinking of a support, help, tutorial, projects, gallery BB

All well and good, but what will bring traffic to your site?

As it is there are too many forums to visit in one evening,

and those without a body of members will perish.

Seems only this morning you were asking if we knew

of any forums? Have you done any research to find out

what is already available on the 'net to answer EAGLE

specific questions?

You must have your own forum, it really doesn’t matter, if you build it they will come right? I just couldn’t believe their lousy website using usenet newsgroups for support. 95% of internet users have now clue was usenet is.

Thanks for all the great help!

bigglez:
Correct mechanical placement and orientation of

the components using the airwire ratsnest is critical

with any autorouter application.

This statement just could not be any more true! :slight_smile:

I bet, I use the ratsnest button more than anything.

So, despite the assertions that it connects everything up that it can physically route, nobody has an answer for why it won’t complete that simple route? It’s not an isolated case, I get many of those as well. Usually from fine pitched IC’s. Could it have something to do with the IC pads? I originally thought it just didn’t like routing to pins that were so close together, since invariably it would never route traces from two pins that were beside each other.

I’ve really only tried it a handful of times, though. I gave up on it pretty quickly and haven’t even tried it in a long time, until I did that test above.

Check routing grid in autorouter setup. It’s 50mil by default; you need half of the smallest pitch used, for TQFP it’s 0.25mm.

barkster:
You must have your own forum it really doesn’t matter, if you build it they will come right?

Nope, I don’t.

barkster:
I just couldn’t believe their lousy website using usenet newsgroups for support.

Perhaps you don’t need support? I found the usenet

group to be a gold mine of help when I started with

EAGLE. YMMV.

barkster:
95% of internet users have now clue was usenet is.

Citation needed.

felis:
Check routing grid in autorouter setup. It’s 50mil by default; you need half of the smallest pitch used, for TQFP it’s 0.25mm.

Thanks. Like I said, I’ve tried down to 1mil and you can only specify in mils. It takes a really long time to complete it with a 1mil grid. I’ll give it another try and see what happens.

Have you tried to autoroute this single airwire? Or do you always run the autorouter on the whole board?

The Eagle Autorouter is a piece of cr*p. I don’t understand why some one would spend so much time trying to get it work so as to produce a completely ugly layout. When, in short order a nice clean manual layout could be accomplished.

I’ve said it multiple times but will repeat: Manual routing is NOT THAT HARD. Just try it.

felis:
Have you tried to autoroute this single airwire? Or do you always run the autorouter on the whole board?

I have not tried the single wire. Always doing a full board is kinda misleading as I hardly ever use the autorouter. Every once in a while I'll experiment and give it up. I'll try removing a similar route on my already routed board and see what happens. I've tried partial routing, but I don't remember what happened.

Philba:
The Eagle Autorouter is a piece of cr*p. I don’t understand why some one would spend so much time trying to get it work so as to produce a completely ugly layout. When, in short order a nice clean manual layout could be accomplished.

I’ve said it multiple times but will repeat: Manual routing is NOT THAT HARD. Just try it.

Eh. I don't actually plan to use it, I just have this problem in my head and I want to see what the answer is.