Tuesday, December 29, 2015

First etching attempts.

Hi!

I’ve started to work on the chemical etching process to remove the copper from the laser etched paint PCBs. I’ve used the etchant solution described here:

http://www.instructables.com/id/Is-the-best-PCB-etchant-in-every-kitchen-/

And here are my first results. Macroscopically they look good:

 

IMG_1098-2015-12-28-20-56.jpg

But when I increase the magnification the quality is not enough:

IMG_1097-2015-12-28-20-56.jpg

So, there are lots of improvements to work on yet. The etching time may have been too much, the cleaning of the board may not have been so good, or the choice of paint may have been a bad one.

IMG_1096-2015-12-28-20-56.jpg

Please send me some feedback. I’d appreciate a lot!

Thanks for reading!

Saturday, December 26, 2015

CNC at work.

Hi. I’m posting today a video of the CNC working to draw a PCB on a black painted copper board with a 0.5W 808nm laser diode assembled as described on earlier posts.

http://youtu.be/0gs81iwvZY8

EDIT: Watch this video too:

http://youtu.be/m611W31-SX0

Friday, December 18, 2015

New laser holder.

Hi!

I’ve just installed a new support for the 808nm 0.5W diode laser discussed in previous posts. It is a very simple one, using a copper tube and two PVC plumbing parts. Now the focus position can be changed by moving the Z axis.

thumb_IMG_1070_1024-2015-12-18-16-34.jpg

 

 

thumb_IMG_1071_1024-2015-12-18-16-34.jpg

I’ve also assembled all the electronics in a sealed plastic box, with removable connections to switches and step motors.

thumb_IMG_1045_1024-2015-12-18-16-34.jpg