The first time I read the post I thought you were trying to etch PCBs on the Epilog. Either way, it's not going to work - the laser won't cut through the copper. If it's a single sided board there's a chance that you may be able to cut it from the back and finish it off with an x-acto knife or similar.

I've been looking for a solution to etch some PCBs, and I've read that you can lightly coat the board in spray paint, etch on the laser, and the remaining paint acts as a resist. You chemically etch the board as usual and remove the left over paint with acetone.

I asked Epilog. Here's the reply:

Thank you for your enquiry. We have tested FR4/G10 material and it can be cut just using your 75Watt laser as long as there is no copper layer. The material is highly heat resistant so the final cut results in some charring/burning of the edges (which can be wiped clean afterwards, using alcohol).

You can likely cut up to 1/8” or more using a 75Watt.

As far as we know, cutting FR4/G10 does not release any corrosive gasses. Make sure to use a good ventilation system and use air-assist.

Thank you,

Peck Sidara

Epilog Laser

www.epiloglaser.com

Ph: 303.277.1188

Fax: 303.277.9669