MDF "Forbidden"

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(Tom Newsom) #41

Start low power and fast movement. Ramp up the power until you start to see success/failure.


(joeatkin2) #42

Large tube full of meda (broken plates ect ) with watter flowing down and airflow up


(joeatkin2) #43

I think that you paint with etchrisist and then cut it away with the laser


(Andrea Campanella) #44

This gentleman :
https://www.youtube.com/watch?v=t2WC-XdNVDw

Managed it with a speedy 100…

and he released a tutorial:

http://fabacademy.org/archives/2015/doc/fiber-laser-cutting-pcb.html


(Tom Newsom) #45

[googles]

So that’s FR-1, which is the non-reinforced kind.
FR-4 is the type with glass fibres.


(Pete Hellyer) #46

Bear in mind he uses a fibre laser for this, whilst we have a co2 laser. Quite what difference that makes is lost on me, but it may be a thing.


(Tom Lynch) #47

Fiber lasers are designed for engraving metal, this isn’t a fiber laser, it won’t work.

However the spray paint, engrave etch method would work still in much the same way.


(Kunka Velikova) #48

Hello, i see a big discussion on MDF because of the formaldrhyde glues but is it not the same with plywood? They use formaldehyde based glues and we had a lab expert say we exceed the limit twice for such emissions.Can u recommend plywood which uses different type of glue, what type partucularly? Is that what laser-ply is


(Tom Lynch) #49

The MDF concern is historial when we had a different extraction system an the increased amount of wood glup it produces like ply blocks the filters.

However thats not such an issue now, and my understanding is that laser ply and MDF were acceptable still because they are formulated to be better and safer for the laser cutter.

Personally I think it’s snake oil having worked with both, but this is a call for the current @lasertechs


(Dermot Jones) #50

Yes, that’s the idea of laser ply, and laser MDF – much lower formaldehyde content


(Petra) #51

It is the same with plywood - only laser grade plywood can be laser cut here.