Darkly Labs Community

E1 Assorted Acrylic Sample Results

I managed to get some sample pieces (approx. 4" x 4") of different types/colors of 2mm acrylic and did some tests

Below is a summary of the results (10mm side square and 5mm OD circle)

Opaque Yellow : 400mm/min; 100% power; 5 passes

Transparent Orange : 400mm/min; 100% power; 8 passes (edges are not smooth)

Transparent Red : 400mm/min; 100% power; 5 passes

Opaque Red (with sparkles) : 400mm/min; 100% power; 5 passes

Opaque Dark Green : 400mm/min; 100% power; 5 passes

Translucent (Smoky) Dark Brown : 400mm/min; 100% power; 4 passes

Opaque Black : 400mm/min; 100% power; 4 passes

See below photo:

Opaque White : CANNOT CUT OR ENGRAVE (not even a scratch) - 400mm/min; 100% power; 16 passes

Opaque Dark Blue : CANNOT CUT even at 400mm/min; 100% power; 16 passes; but engraves

Opaque Light Blue : CANNOT CUT even at 400mm/min; 100% power; 16 passes; but engraves

Opaque Orange : CANNOT CUT even at 400mm/min; 100% power; 16passes; but engraves

Transparent Black : CANNOT CUT even at 400mm/min; 100% power; 16 passes; but engraves

-Joel

2 Likes

The speeds are quite high. Is that a typo or the need to make small cuts in the plastic to avoid burning?

Hi Fred,

It was indeed a typo…should be mm/min and not mm/s…I have updated the above post with corrected speeds.

Joel.

Great post THANKS Joel.  What power head were you using? Also, switch settings??

 

Cheers

Daryl

 

Hi Daryl,

Using the 4W unit at 3 amps (all switches ON)

Joel.

Good stuff.  THANKS Joel.

Thank you for taking the time to experiment and post your results.

Does anyone know if the 4w laser can cut 3mm acrylic? I’m in the UK and having difficulty finding 2mm acrylic in any colours other than black or white.

If anyone can help that would be fantastic :slight_smile:

Hi John
In the UK there is a distributor for Perspex http://perspex.com/key-partners/uk/ and here [http://www.perspex.co.uk/

](http://www.perspex.co.uk/)Perspex is: (from https://en.wikipedia.org/wiki/Poly%28methyl_methacrylate%29)

Poly(methyl methacrylate) (PMMA), also known as acrylic or acrylic glass as well as by the trade names Plexiglas, Acrylite, Lucite, and Perspex among several others (see below), is a transparent thermoplastic often used in sheet form as a lightweight or shatter-resistant alternative to glass. The same material can be utilised as a casting resin, in inks and coatings, and has many other uses.

They have many colors and types of this acrylic glass.

I have requested some samples, and i have received a bunch of them :slight_smile: (see picure). Now i am testing the different colors and types.
Very interesting. When i have made more testing, i will publish the results here.

Regards

Salvi

Thanks for the info Salvi, I’ve just requested some samples myself :slight_smile:

I’m still really hoping that the 4w laser can cut through 3mm acrylic, even if only certain colours.

As I’ve not even assembled my Emblaser, I’m still a complete novice at all of this.

After reading around on the web I found this post regarding cutting 3mm acrylic and they mention changing the z depth on each pass to enable the laser to cut right through, is something that happens/is possible using the Emblaser and Cut2d?

http://jtechphotonics.com/?p=1648 

Ah think I’ve found the answer http://forum.darklylabs.com/index.php?p=/discussion/305/cut2d-material-thickness 

Does that mean that if the optimal focus is set, then applied using the focus tool laid flat on the material to be cut to set the correct height of the laser, then the thicker the material being cut the less optimal the focus becomes the further the down into the material the laser cuts?

If this is the case, would it be possible to set the focus point/laser height so that the lasers focus is at it’s optimal midway through the depth of the material, would this even help?