Ebony

Discussion on what materials you laser cut or engrave
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Jack Martin
Posts: 37
Joined: Fri May 07, 2021 10:17 am
Location: Washougal Washington
Country: USA
Laser Machine Make or Type: OMTech
Laser Power: 50
Laser Bed Size: 12x28
Home Position: TL
Control Software: LIGHTBURN
RDWorks Version: V8
Ruida Controller: Other
Windows Version: 10
Accessories: Rudia RDworks V8, rotory, pass thru

Ebony does not cut very well at all, compared to other woods. Padauk, maple, pine, walnut, camphor burl all cut well, same thickness, speed. Have not tried cobolo yet But ebony is unreal, 8 passes to do what I can with one for the above types... yes the same settings. I would compare it to the difference between acrylic and polyester.

Mostly a curiosity thing at this point, but wonder why.
Brian Book
Posts: 59
Joined: Sat Dec 03, 2016 10:59 am
Location: Burlington, Ontario Canada
Country: Canada
Laser Machine Make or Type: Rayfine
Laser Power: 80W
Laser Bed Size: 24" x 16"
Home Position: TL
RDWorks Version: v18.01.18
Ruida Controller: RDC6442
Windows Version: 10
Accessories: Chuck Rotary

I have the same problem can't even cut 1 mm black acrylic .... have no Idea why ?????
Ray Fine 80w 6040 110v TL
Chuck Style Rotary
RDWorks 8.01.18
Corel Draw 6

Brian
Jack Martin
Posts: 37
Joined: Fri May 07, 2021 10:17 am
Location: Washougal Washington
Country: USA
Laser Machine Make or Type: OMTech
Laser Power: 50
Laser Bed Size: 12x28
Home Position: TL
Control Software: LIGHTBURN
RDWorks Version: V8
Ruida Controller: Other
Windows Version: 10
Accessories: Rudia RDworks V8, rotory, pass thru

That may be polyester and not acrylic. Melts and glues back to self
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Gene Uselman
Posts: 2161
Joined: Thu Jul 07, 2016 3:18 pm
Location: Suburban Minneapolis, Minnesota, US
Country: USA
Nickname: Gene
Laser Machine Make or Type: QC
Laser Power: 130W
Laser Bed Size: 900x1300
Home Position: TR
Control Software: LIGHTBURN
RDWorks Version: RDw .19 & Lightburn
LightBurn Version: Latest
Ruida Controller: RDC6442
Windows Version: Win 10 Pro
Accessories: I have a combining lenses, pin tables [homebuilt], honeycomb tables , wireless remote, Modifed Ultimate Air Assist, home built non-powered rotary device, PrusaMK4 and Mini Prusa printers.

Ebony must be very dense- this is from the website of a local guitar maker:

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Ebony inlay.jpg
Brian- I suspect you have a completely different problem- you might elaborate?
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Jack Martin
Posts: 37
Joined: Fri May 07, 2021 10:17 am
Location: Washougal Washington
Country: USA
Laser Machine Make or Type: OMTech
Laser Power: 50
Laser Bed Size: 12x28
Home Position: TL
Control Software: LIGHTBURN
RDWorks Version: V8
Ruida Controller: Other
Windows Version: 10
Accessories: Rudia RDworks V8, rotory, pass thru

Have done that type of inlay with a small router and can't tell any difference between woods, but the laser really gripes about the ebony. I can cut it for inlay pieces but need to increase the size more that I would with other items I need to take multiple passes at. I think there is an oil or something in the wood. I would like to try a piece of snakewood, ironwood, and a couple others, but so expensive not worth it.
Brian Book
Posts: 59
Joined: Sat Dec 03, 2016 10:59 am
Location: Burlington, Ontario Canada
Country: Canada
Laser Machine Make or Type: Rayfine
Laser Power: 80W
Laser Bed Size: 24" x 16"
Home Position: TL
RDWorks Version: v18.01.18
Ruida Controller: RDC6442
Windows Version: 10
Accessories: Chuck Rotary

I tried cutting Ancient Bog Oak .... still a no go .... my thought is the color black is absorbing the light from the laser
Ray Fine 80w 6040 110v TL
Chuck Style Rotary
RDWorks 8.01.18
Corel Draw 6

Brian
Jeffrey Aley
Posts: 388
Joined: Fri Aug 11, 2017 1:08 am
Location: Folsom, California
Country: United States
Laser Machine Make or Type: Kehui
Laser Power: 50W
Laser Bed Size: 500mmx300mm
Home Position: TL
RDWorks Version: 8.01.24
Ruida Controller: RDC6442
Windows Version: Win10 Enterprise
Accessories: Spray bottle with water (for small fires)
Fire extinguisher (for big fires)

Brian Book wrote: Wed Jun 23, 2021 8:54 pm I tried cutting Ancient Bog Oak .... still a no go .... my thought is the color black is absorbing the light from the laser
I don't know why those materials won't cut. But the idea of the color black absorbing light from the laser is a little bit backwards. You WANT the material to absorb the light (energy) from the laser. That's what causes it to heat up and therefore cut. The opposite would be a mirror, which reflects the light from the laser without being affected.

Also, things that absorb (or reflect) visible light don't necessarily absorb (or reflect) the Infra Red light from our lasers.

Regards,

-Jeff
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