EAGLE User Support (English) - Recent Threads

ULP to change class of a net?

jpadie — Tue, 27 Jan 2026 17:17:38 GMT

I've tried things like

if (classNum > 0 && sClass != classNum) {

exit(S.class.number = classNum);

}

and

if (classNum > 0 && sClass != classNum) {

S.class.number = classNum;

}

etc

but nothing seems to be working. What I am trying to do is to reassign a known list of nets to a specific class.

any help gratefully received

RE: ULP to change class of a net?

dougw — Wed, 28 Jan 2026 01:21:32 GMT

It has been eons since I wrote a ULP. You can usually find one someone else made.

Have you checked this out:

https://github.com/plusea/EAGLE/blob/master/ulp/cmd-change-class.ulp

RE: ULP to change class of a net?

colporteur — Tue, 27 Jan 2026 22:21:34 GMT

Great to hear you found an answer.

No. English does not have to be your first language.

Your profile point counts indicates you are a new user. That earns a Welcome.

The question you have asked has no context, no back ground and no reference. If you desire an answer, invest in the question by providing details.

Many users in our community do not communicate with English. It is not a barrier. You will get very little response from me and some others if you post questions to the forum like you post a question to AI. Most times the questions look like it came from young people seeking a quick answer for a school project. That is frowned upon.

RE: ULP to change class of a net?

jpadie — Tue, 27 Jan 2026 21:46:09 GMT

Why are you referring to AI?

Are you suggesting that the tone or content of my message was poor?

Would you prefer that I write in another language? I speak french, Spanish and Italian fluently as well as English. I can probably do something comprehensible in German too.

As it happens I have solved the problem by editing the XML directly. I imagine there is a good ulp solution too.

RE: ULP to change class of a net?

colporteur — Tue, 27 Jan 2026 20:25:25 GMT

The responses you get from posts on this site are human generated. You will have less success if interact with humans the same way you interact with AI.

RE: looking for someone to help capture screenshots of old EAGLE font

cstanton — Mon, 21 Jul 2025 09:37:38 GMT

It was an OSIFONT variant, at least in later versions.

" New EAGLE Vector Font:
- EAGLE now uses a new internal vector font which is very similar to OSIFONT, a common font
implementation in the CAD industry. It covers a bigger set of characters, in particular
common Western European, Greek, Cyrillic, other Eastern European characters and many special
symbols. The new font does not become active unless the option "Keep old vector font in
this drawing" in Options/User interface is unchecked. For new designs, the new implementation
is taken by default.
We give special thanks to EAGLE long term customer Andreas Weidner, (anweid ) who designed this font for us."

Be wary that fonts and typefaces are subject to copyright.

looking for someone to help capture screenshots of old EAGLE font

darthisurus — Thu, 17 Jul 2025 01:26:01 GMT

I'm looking to recreate the old angular font featured in EAGLE/CADsoft. I downloaded a trial of EAGLE FUSION 360 and it didn't have it (or I somehow couldn't access it).

I'd like to create what was in EAGLE as actual usable TTF or opentype font. Want to use it in some design/art projects.

RE: looking for someone to help capture screenshots of old EAGLE font

shabaz — Thu, 17 Jul 2025 03:52:32 GMT

It is a nice font. If you're just looking for any vector line font that was used in the past, then 'Herschey Simplex' may be worth digging up, since that's already in digital formats, whereas the EAGLE one is possibly proprietary and not documented. Herschey Simplex does not look alike however, it uses more curve-like shapes (still straight lines when zoomed in), whereas EAGLE's font embraces straight lines and octagon-like shapes for traditionally curved characters.

Anyway, if you're set on EAGLE, then the two images below can be clicked on to enlarge (and to undistort them because this site sometimes renders my screenshots squashed, unless clicked on), then right-click to save in high-res, in a .png format. One set is on a grid, and the other has a blank background. (looks like we were doing it at the same time dougw ). I did it in the normal pen thickness, and a thinner pen, in case you're trying to get the line segment position values more precisely for recreating the font.

For the ones on the grid, there are 10 grid lines for the capital letter height, so you can approximately obtain line length proportions quickly.

RE: looking for someone to help capture screenshots of old EAGLE font

dougw — Thu, 17 Jul 2025 03:41:58 GMT

RE: Manual trace bottom track across bottom polygon: how to?

shabaz — Sun, 02 Mar 2025 13:34:34 GMT

Hi Gerald,

I'm the same, I prefer manual routing; I meant that modern features for guided routing in KiCad are better than the poor auto-router in EAGLE. I don't mean auto-router is better than manual routing (at least, not for the complexity of boards one would be using these particular tools for).

I've not seen what improvements KiCad 9 has made (I don't think they have the rubber-banding feature you mention). In v8, there's a kind of slight approximation, which is the auto-complete. It allows you to move a part, and all connections will turn to air-wires as you mention; however, if you then press Shift-F (with the component highlighted), it will try to auto-fix the connections, i.e. the end result of a rubber-banding sort of operation. Here's a video of it, where I moved a part, and then deleted the traces that I didn't like to remain, and then selected the component and pressed Shift-F. Not as smooth as rubber-banding of course. You can see it missed one trace, but that's easy to fix, by clicking on that trace and pressing Shift-F again.

Personally I don't use this tool in this way (I sometimes use it per track, using just the 'F' key). For general routing, I usually have KiCad set to the 'walk around' mode, and find that very useful minimal guidance while routing (but the other options are very useful too).

community.element14.com/.../track_2D00_autocomplete.mp4

The EAGLE imports of libraries is already excellent in v8, however since EAGLE had issues with slotted pads and shaped pads, it is beneficial to either try to clean up those specific footprints, or to recreate them, using the direct KiCad support for those features.

But it would be wise to retain old EAGLE for old projects for sure (even though, again, KiCad support of EAGLE project import is pretty good too).

Personally, I've over time just redone the footprints that I wanted to use, rather than use the EAGLE version (however, I have still imported the EAGLE footprints, so I can easily compare, to reduce the risk of error).

Regarding the 3D models, I now try to always have a 3D model for each new component I add, simply because I've found it reduces errors so much, in two ways:

(1) The obvious way, which is that you can easily see if there are clashes between parts on the board, and optimize the position of parts on board edges, etc.

(2) Not-so-obvious (at least not initially to me!) - it greatly reduces the risk of error in the PCB footprint creation process in the first place, because, if your 3D model doesn't match the pads and outline, then it's immediately clear there is an error in the footprint or the model! This has been immensely useful, because often some dimensions may be vague or missing in the drawings in the datasheets, or I may have introduced some accidental error. The 3D model lets me instantly get a decent amount of additional confidence that the footprint is good.

Manual trace bottom track across bottom polygon: how to?

earckens — Sat, 01 Mar 2025 11:40:15 GMT

I need to get a bottom trace between two via's that currently are connected with an airwire.

However, when doing the trace at the bottom, the polygon does not cede to make way for that trace.

Using Eagle v7.6.0

How to solve?

RE: Manual trace bottom track across bottom polygon: how to?

earckens — Sun, 02 Mar 2025 13:03:02 GMT

Great explanation, thank you geralds.

Personnaly I abhor Autocad's tendency to bring (in my view) superfluous version updates. And especially their policy of not allowing offline work. I also do 3D design, and use Freecad. I had a look at Autocad's 3D programs but turned off when realising they only work online.

To each his own :).

RE: Manual trace bottom track across bottom polygon: how to?

geralds — Sun, 02 Mar 2025 12:46:24 GMT

Hi shabaz!

Yes, many users strictly ignore modern functions.

Fusion 360 (Eagle 9.6.0 on the web) has a 3D function, has a "modern" autor-outer, but ... so far, I like manual routing - it's a training for my brain.

One of the best autor-routers I've worked with was this one from PCAD - now actually an Altium.
But Altium is extremely expensive, as is Autodesk. Well, you have to specialize somewhere, and that's what I did with Eagle - Fusion 360.

KiCad has great features now.
I'll also be switching to KiCad soon - 2026, when Autodesk will no longer support Eagle in the offline version (Cadsoft version).
Until then, or even sooner, if:

I really want the connection of the components to the wires to be electrically fixed and that the traces are real rubber bands.
Every time you move them, then they dissolve into lines.
Traces should be treated as traces. Eagle does that very well.
Eagle treats wires/traces strictly separately from drawn lines, just like Altium's PCAD (since 1985, my first ECAD I worked with).

The gimmicks with a super-great library, with or without 3D components, are very good so far, I also like playing with it, I'm currently building up a decent library, but it's not really necessary for a real product.
Electrically! There must be no errors.
Unfortunately, only a few software manufacturers can program it properly.
Yes, I also look at costs, of course, but I understand that everything costs something somewhere.
It should just be fair.

I'm curious to see what KiCad will bring this year when I read these explanations and update descriptions on their website.

RE: Manual trace bottom track across bottom polygon: how to?

earckens — Sun, 02 Mar 2025 12:14:08 GMT

Very useful answer! Thank you, Erik

RE: Manual trace bottom track across bottom polygon: how to?

shabaz — Sun, 02 Mar 2025 12:02:59 GMT

You can improve this significantly. You may say "Eagle, for me, does what I want it to do" but I think you're ignoring modern features and relying on the pretty rotten auto-router, and I can imagine the performance will be bad. Your PCB is on version 12.. that's not normal.

Anyway, if you think you're doing fine then I'm not going to interfere.

RE: Manual trace bottom track across bottom polygon: how to?

geralds — Sun, 02 Mar 2025 11:36:14 GMT

"The 'issue' with the polygon I solved yesterday. No need to switch off the polygon, just trace the track across the polygon, do a refresh (ratsnest) and the polygon will have cleared a path for the added track."

Yes, you don't need to switch off. I just suggested it for easier working.

Refreshing the rat's nest works perfectly in Eagle Version 7.6.0, but sometimes corners and edges are visible after refreshing.
This happens when you work in "off-grid" mode, and calculation errors (rounding errors) are visible.
An unfavorable setting of the distances, fine gradation - polygon component - can also cause such rounding errors.

I always check whether I am laying the conductor tracks on the set grid and make sure that these, especially the slanted conductor tracks, are really 45.0 degrees or a multiple of that.
I always set the grid levels to be breakable down to a multiple or divisible so that the components are also placed on a grid.

-> Your autorouter is obviously set to route "off-grid" because it edges and slant the conductor tracks in such a way that it jumps around to the components.

I route mainly manually myself, including multilayer PCBs. That way I have control everywhere. Time is relative...

I also observe high frequency guidelines. Especially where there are clocks or high switched currents/voltages.

I almost never route between the component pads on SMDs, that can be critical unless it is not a problem because the distances are far enough, or the conductor does not carry any frequencies.
I try to use a direct route strategy (in cardinal directions: east-west, north-south, east-north, west-south), with as few vias as possible.
Vias next to the components are better than underneath them.

For SMDs, I make sure that I route on the top side, for through-hole components, I make sure that I route on the bottom side.

Here, the through-hole components are mountet on the bottom side (mirrored), so the tracks are on the top side.
I've all manually routed. North-south, east-west; left top power-in, right top signal-out

-> On your board, one of many issues:
the large electrolytic capacitors are connected to the top-layer traces.

This can cause major problems at high temperatures and under physical stress.
-> "cold solder joint", then the capacitor wobbles and you have problems, even where the conductor track breaks across.
-> How do you then repair it?

As well the "high-current" traces are very small, and they are going across the PCB. Your PCB is a power supply that can be very warm, or even hot, containing a µC module.

- So, my suggestion: connect power tracks (if there is no other option, make a power layer, or change the layer, but it is better not to lead them to the components on top) on the bottom layer side, then you have good stability and can also repair the connections better.
I have had to repair many such errors in the past, e.g. TVs, monitors with CRT screens, industrial devices, power supplies, etc...
I had to patch many burned-out holes in PCBs.

I wish you the best with your projects.

Gerald

---

RE: Manual trace bottom track across bottom polygon: how to?

earckens — Sun, 02 Mar 2025 09:52:42 GMT

The 'issue' with the polygon I solved yesterday. No need to switch off the polygon, just trace the track across the polygon, do a refresh (ratsnest) and the polygon will have cleared a path for the added track.

I am not interested in 3D design features such as for libraries: mine do very well for me. And I do not want having to recreate every library in my folders.

Also, designing new packages never has been a problem for me, no issues with error codes. Eagle, for me, does what I want it to do: create schematics, libraries, and from there pcb tracing, all in a well flowing manner. To me Eagle just is a workhorse to make pcb's. Hundreds of them for over a decade.

RE: Manual trace bottom track across bottom polygon: how to?

geralds — Sun, 02 Mar 2025 09:23:22 GMT

Hi,

1.) your routing traces are not very ideal as well some components.

-> rotate R7, R2,

-> the traces between R7 and R5 are very critical > go another way

2.) you can switch off the polygons

-> a.) click on a polygon (on the edge off this polygon, e.g top) with the right mouse button

b.) unroute this polygon

The same do it with the other (bot polygon)

Then they are switched off and you can route your traces.

3.) switch on the polygons

-> click on the ratsnest button on eagle

4.) routing - you can change the routing strategies because this what you use is not very optimal

because the trace walks from the LM_IC far down at 45 degrees.

Actually, I use the version 9.6.0 (all versions since 5.4.0) - Fusion 360 from Autodesk

I have installed the version 6.6.0 pro, the 7.6.0 in standard version (100x80mm), and the version 9.6.0 pro.

So, I can help you with the latest version, saving the schematics as well the PCB downgrading to the version 7.0.0

-> with this you can open it with your Eagle version

KiCad – so, yes and no…

Yesterday I installed version 9.0 (I already had version 8).

The big problem is that the traces get lost when I rotate a component, for example.

The traces are not a rubber band when I move a component or a track vertex.

So, I think that is a big problem. This can cause many other problems – like, tearing apart components to traces to labels, and many other things.

Especially where everything is very close together. This makes the technician very nervous.

"Try doing that when you have to route a multilayer. Well,,,,"

Can you show the complete PCB?

Regards

Gerald

---

RE: Manual trace bottom track across bottom polygon: how to?

shabaz — Sat, 01 Mar 2025 21:53:09 GMT

Glad it's sorted.

Regarding: "Eagle is the best since sliced bread", you'd be surprised. That old EAGLE is missing a ton of useful features that KiCad has. Off the top of my head: 3D (reduces the chance of errors dramatically when you can visualize the board and components in all orientations), real shaped pad support (without all the errors/warnings that EAGLE throws up), slotted holes support (versus needing to draw ovals in EAGLE), and guided routing options (versus nothing in EAGLE apart from the autorouter which is non-ideal), and Gerber inspection capability (versus nothing in EAGLE).

V7 EAGLE must be a decade or so old now.

RE: Manual trace bottom track across bottom polygon: how to?

earckens — Sat, 01 Mar 2025 20:51:26 GMT

I got it solved:

1. from the upper right via a bottom trace to the lower left connecting track, and connect. It will then show a large yellow cross across that connection, solve it with placing a via.

The bottom polygon automatically clears itself around the new trace.

Trace width is per Elecrow design ruls.

Eagle is the best since sliced bread. To me.

RE: Manual trace bottom track across bottom polygon: how to?

shabaz — Sat, 01 Mar 2025 19:46:51 GMT

It's been too long since I used EAGLE, so I can't recall a reason (suggest it's time to move to KiCAD maybe : )

Have you tried closing EAGLE and starting it up again, in case EAGLE has corrupted it's internal temporary data (you're using an old version of EAGLE).

As an experiment, you could back up your files, and then delete the ground plane polygon, and then see if you can lay down the trace (and then add the polygon after that).

Also, your traces look extremely thin.. are you sure they meet the PCB factory design rules? Have you loaded any design rules?

RE: bom3_csv_v2.ulp adds many commas

Oppie51 — Tue, 12 Mar 2024 18:52:35 GMT

I've been generating BOMs with bom-am-19 ULP
Lots of options but I save in html. This opens nicely in a browser for review and imports directly into excel.

bom3_csv_v2.ulp adds many commas

H_Lenk — Tue, 12 Mar 2024 10:48:50 GMT

At my office desktop computer (windows 10, only) I encounter since last year a funny problem when using the ULP: bom3_csv_v2.ulp and also load my parts-parameter file.

When I generate Parts and Values as EXCEL files, the rows of the CSV files start with the parts-parameters and then are filled up with commas until column #470.

It is not nice to work at those files with EXCEL!

This problem does not happen with my home desktop PC.

Because I am not smart enough to understand and change the bom3_csv_v2.ulp program, I wrote a tiny Pythion program to get rid of those surplus commas.

#!/usr/bin/env python

# -*- coding: utf-8 -*-

# BOM_Comma.py

# Copyleft 5.3.2024, lenkh <lenkh@Uni-Mainz.de>

# Program to remove trailing commas in files generated with the

# EAGLE ULP program: bom3_csv_v2.ulp at my Uni-desk PC

import sys

import glob

print()

print(glob.glob("*.csv")) # show local files with csv extension

print()

s = input("Enter EAGLE-BOM file name with many trailing commas => ")

in_file_name = s + ".csv" # input file

out_file_name = s + "_new.csv" # output file

with(

open(in_file_name, "r") as file_1,

open(out_file_name,"w") as file_2

for s in file_1: # read the input file

print(s) # original string

# find first occurrece of the many ,,,,,,,,,,,

print()

i = len(s) - 2 # point to right most character

comma = s[i]

while s[i] == comma: # scan string from right to left

i -= 1 # decrement pointer

# copy the string without trailing commas

out_s = ""

j = 0

print(i,j)

for j in range(i+1):

out_s = out_s + s[j]

print(out_s) # show output string

file_2.writelines(str(out_s) + "\r") # write to output file

file_1.close()

file_2.close()

Pcb board layout green masking remove

Biju — Thu, 11 Jan 2024 14:27:53 GMT

Respected members, please help me solve this problem?. Currently iam designing a Switched mode power supply board in eagle cadsoft 7.6.0 software. I don't know how to remove green masking layer from a certain areas in board layout looks like in the below attached images. Please help me to solve this problem, which tool or layer i have to use for this, waiting for all of your valuable feedback to solve this, thankyou.

RE: Pcb board layout green masking remove

Biju — Thu, 11 Jan 2024 15:41:13 GMT

Thankyou sir for the valuable information, definitely i will try.