Author Topic: Eagle cad Negative?  (Read 1787 times)

arjepsen

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Eagle cad Negative?
« on: September 15, 2017, 01:49:09 PM »
Hey.

I found out, that I could make an etching mask, by spraying black paint on the surface, and then laser the parts to get etched. After lasing, I can easily remove the paint with a toothbrush - works wonders, and I did a nice enclosure etch this way, for a guitar pedal.

Anyways, now I'm trying to do a pcb board the same way.
I've made the layout of the pcb in EagleCad, but now I need to somehow get that design inverted, and imported into t2laser, so it will burn the parts that is supposed to get etched away....
Unfortunately I can't get EagleCad to invert it...
Can anyone help?

Regards
Anders

ThothLoki

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Re: Eagle cad Negative?
« Reply #1 on: September 15, 2017, 03:14:33 PM »
what file format are you importing to t2?
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

Zax

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Re: Eagle cad Negative?
« Reply #2 on: September 15, 2017, 03:15:28 PM »
That was exactly my question but you beat me to the post...

ThothLoki

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Re: Eagle cad Negative?
« Reply #3 on: September 15, 2017, 03:24:24 PM »
That was exactly my question but you beat me to the post...
8)
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

nottingham82

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Re: Eagle cad Negative?
« Reply #4 on: September 15, 2017, 09:40:40 PM »
loki is a forum ninja
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

ThothLoki

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Re: Eagle cad Negative?
« Reply #5 on: September 15, 2017, 10:14:23 PM »
loki is a forum ninja

Sorry. I to not practice ninjutsu. My wife, daughter and I do practice Taekwondo though. Very rewarding. My laser has almost taken a front line side kick before when it decided to act up.

On another note, my company has asked me to make them come coaster for the conference rooms as we have changed our name and logo. When I comes to very small lettering, my 2w laser is a LOT better than my 2.3 pwm. Now I wish I had a 1.6w or 500mw. 25-30 slate coaster order if they like the obe I made ;D
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

arjepsen

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Re: Eagle cad Negative?
« Reply #6 on: September 16, 2017, 11:22:33 AM »
what file format are you importing to t2?
Well, I'm open to suggestions here :-)
Like I mentioned, I have used the laser earlier on an enclosure. For that, I made the graphics in Libreoffice draw, and exported it as a gif.
However, I can't export a gif from Eagle  :-\

laser_cutter

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Re: Eagle cad Negative?
« Reply #7 on: September 16, 2017, 11:55:52 AM »
This should work

create the board is a way that the does not remove unused copper in the etching process.

Save as jpg or or png

Open in T2

Invert colors - this should create a situation where the traces are outlined in black.

Burn/engrave image

Zax

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Re: Eagle cad Negative?
« Reply #8 on: September 16, 2017, 12:41:49 PM »
The gif will work too... I think  ::)

Edit: Yes, you can load a gif but it's not one of my recommended formats so you have to change the type to *.* and then it works.

PNG would be better, the problem with JPG is the compression artifacts.
« Last Edit: September 16, 2017, 12:45:47 PM by Zax »

arjepsen

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Re: Eagle cad Negative?
« Reply #9 on: September 16, 2017, 12:57:01 PM »
Uhm.. as I wrote, I can't - can not - export to gif.
It is possible to export to an image file, but it's not a workable solution, since there's varous text that gets printed as will - some of which pretty much shorts the copper traces....  >:(
I can print to a pdf file on a A4 page format - but still my problem is to get it inverted like a negative.

ThothLoki

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Re: Eagle cad Negative?
« Reply #10 on: September 16, 2017, 01:15:02 PM »
If you are using Eagle, in the PCB editor, just select View-Layer Settings and uncheck the bNames and tNames

Then export to PNG and it should work great in T2
Laser: A5 2000mw with L7 Board / A3 2500mw PWM with Mana SE -- All using T2Laser
3D Printer: Monoprice Maker Select v2.1
Image Resizer Applications (All OS): http://benboxlaser.us/index.php/topic,1434.msg17297.html#msg17297

nottingham82

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Re: Eagle cad Negative?
« Reply #11 on: September 16, 2017, 04:30:40 PM »
and t2 has the option to invert once you load the png.
Laser: 2500mw A5 eleks maker
OS: Windows 10 all in one pc
Software: T2
http://www.gearbest.com/3d-printers-3d-printer-kits/pp_290386.html Paid $160 in 2016

arjepsen

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Re: Eagle cad Negative?
« Reply #12 on: September 17, 2017, 11:49:43 AM »
If you are using Eagle, in the PCB editor, just select View-Layer Settings and uncheck the bNames and tNames

Then export to PNG and it should work great in T2
Thanks :-)
Unfortunately, that's not it. Everything except bottom and pads are disabled.