CAD_CAM_EDM_DRO at Yahoo! Groups

Re: Laser "route" Printed Circuit Boards

David LeVine — Sun, 08 Nov 2009 04:23:39 GMT

... That is wire EDM, sinker EDM would just cut through the copper, then bottom out on the FRP substrate. -- David G. LeVine Nashua, NH 03060

Re: Laser "route" Printed Circuit Boards

David LeVine — Sun, 08 Nov 2009 04:13:39 GMT

... No, but it does help limit vibration, and that is why it exists. -- David G. LeVine Nashua, NH 03060

Re: Laser "route" Printed Circuit Boards

Roland Jollivet — Sun, 08 Nov 2009 04:02:23 GMT

What do you mean by 'top to bottom'? Electro-Discharge Machining uses spark erosion to remove metal. So you have the board laying flat in some EDM fluid. Then

Re: Laser "route" Printed Circuit Boards

Will Holding — Sun, 08 Nov 2009 04:02:03 GMT

Not necessarily- sometimes it uses an electrode mounted on a Z axis. I think this is called "sinker" EDM. ... From: "Michael Fagan"

Re: Laser "route" Printed Circuit Boards

Jon Elson — Sat, 07 Nov 2009 19:45:37 GMT

... Somebody, I thought it was LPKF, had a machine a decade or so ago that worked this way. it had a drum that you wrapped a substrate around. This was a

Re: Laser "route" Printed Circuit Boards

Jon Elson — Sat, 07 Nov 2009 19:39:40 GMT

... There is a machine that does this in air, with an EDM-like process. They use a flexible substrate that is wrapped around a rotating drum, and a wire is

Re: Laser "route" Printed Circuit Boards

- - — Sat, 07 Nov 2009 16:01:54 GMT

... what did u have in mind to edm pcb's? That sounds like an interesting idea.

Re: Laser "route" Printed Circuit Boards

Michael Fagan — Sat, 07 Nov 2009 14:42:26 GMT

How would you etch a board using EDM? EDM cuts all the way through from the top to bottom. ... [Non-text portions of this message have been removed]

Re: Laser "route" Printed Circuit Boards

Roland Jollivet — Sat, 07 Nov 2009 07:00:49 GMT

Laser drilling of via's is not new, maybe 10 years old. And yes, pulsed Yag. If you look at any compact board from the east, the via's are barely visible. All

Re: Laser "route" Printed Circuit Boards

Jon Elson — Sat, 07 Nov 2009 05:43:25 GMT

Danny Miller wrote: Yup, if you've ever had a power circuit burn out violently, it will leave condensed copper vapor on the board, and it is nearly impossible

Re: Laser "route" Printed Circuit Boards

Jon Elson — Sat, 07 Nov 2009 05:39:33 GMT

... If they are actually laser drilled, they are drilled by a really high power pulsed laser, YAG I think. The explosive vaporization of the epoxy leaves a

Re: Laser "route" Printed Circuit Boards

Will Holding — Sat, 07 Nov 2009 04:03:17 GMT

Hi Alan; If you are routing it with something like a Dremel, my guess is you are work hardenering the copper (which work hardens very easily) I know Dremels

Re: Laser "route" Printed Circuit Boards

Roland Jollivet — Fri, 06 Nov 2009 22:30:08 GMT

Hi alan Knee jerk response is; If you want to use a CO2 laser, the power would have to be a bit higher than if the substrate was a wafer of steel. Shiny copper

Re: Laser "route" Printed Circuit Boards

Danny Miller — Fri, 06 Nov 2009 22:29:38 GMT

Yep, I was gonna say this. Copper is a near perfect IR laser reflector, and also a great thermal conductor to remove heat from the cutting zone which keeps it

MPG CNC Project

stcnc2000 — Fri, 06 Nov 2009 16:26:54 GMT

Hey guys, for those who want to build MPG. I put a test video and pdf file on how to make it at my CNC projects page.