Laser Engraving Machine Can you efficiently cut MDF wood for a Subwoofer box using an Engraving laser?
I work at an engraving company. We have a Laser machine that can cut straight through 2 inch hardwood in two passes. I have been planning a build for a custom subwoofer box and just now thought of how easy it would be to draw the designs in C.A.D. and use the laser to precisely cut the pieces. How will the MDF handle the heat? Would I have to use low power and make multiple cuts? I do however foresee a problem cutting angles on the edge *The 3/4" side*. I can always at least use it to cut the circle perfectly!
Hi kyleryantoth,
We have a 60W laser and have cut a number of templates from MDF. The biggest problem in laser cutting MDF, and plywood for that matter, is the glue used to bond the material, not the wood itself. When laser cutting any of these materials I highly recommend using wood with an all natural bonding agent instead of the heavy chemical glues found in the MDF and plys you get at most hardware stores. Check with your local lumber yards for these better materials. When laser cutting thick MDF do not try to cut it in 2 passes like you would with 2" hardwoods since, again, it is not the wood that is the issue but the glue. I would suggest 5-7 passes at slightly faster speeds. The glue, like cutting thick acrylic, will re-bond if cut too hot too slowly. You will also get too much flare-up if not done properly.
Specifics:
How will the MDF handle the heat? Too much heat at a very slow speed will torch the wood. Plan on many passes at 100% power but faster speeds (start about 20%-25% speed).
Would I have to use low power and make multiple cuts? No and Yes. On 3/4" MDF aim for about 1/8" deep per pass (roughly 6 cuts) at full power.
I do however foresee a problem cutting angles on the edge *The 3/4" side. - instead of angle joints try dovetail or box joints. They will look better and make the box more sturdy if you plan on 10"+ sub woofers.
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