Author Topic: Text engraving on 3/8 thick clear acrylic  (Read 1000 times)

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #15 on: January 08, 2017, 12:04:51 PM »
I have also heard you can use masking tape over the area you wish to etch haven't tried it myself yet. it also supposed to help to stop the charring effect on the edges when cutting wood. still untested though myself

I tested with wide painters blue tape and wide regular tan masking tape...the blue did not work as well as the regular tan masking tape.
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Re: Text engraving on 3/8 thick clear acrylic
« Reply #16 on: January 08, 2017, 12:06:00 PM »
What you are describing is basically the same thing I was saying. When there is no backing paper (like with glass) you can put printer paper down and use that the same way. By spraying the paper with water will make it stick to the surface flat.

Now I see what you mean...I will have to test this...thanks...
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nottingham82

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #17 on: January 08, 2017, 12:22:29 PM »
I tape all my wood projects.  Yes overlaps do make visible lines since it doesnt cut quite the same  on the overlap area.  If you dont overlap it creates worse lines. 

I dunno why but I agree with ralph.  Tan is my favorite.  Blue works too. 

It smells... :( nothing too toxic though data sheets say its just paper and adhesive

I have not tried it on acrylic since acrylic seems to engrave so nicely without it. Although some acrylics dont engrave at all.  maybe it will help there

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treinbert

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #18 on: January 09, 2017, 01:25:58 AM »
I also tape my acrylic projects. It came out even more crispy, than without.

I also use the paper versie, tan.

I may try the paper adhesive used for vinyl cutting posters. As it is thinner and available in very low adhesive, so easy to remove afterwards.

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #19 on: January 10, 2017, 04:45:54 PM »
OK I was finally able to do some testing using wild.bill's suggestion:

I placed an 8.5x11 inch piece of paper, about the thickness of a 3x5 index card, down onto my mesh screen work area.

I did a re-focus on this paper surface.

Next, I slid my 6x6 inch 3/8 inch thick clear acrylic plate into my lower left work area 'pocket'.

I did some laser burn tests.

I'm happy to report that the burn tests were a great success...!!! The advantages of this technique are:

1. I don't have to mirror my Text since the surface burns are taking place on the 'bottom' of the plate as it lays in my laser machine work area.

2. No tape, no sticky paper, nothing of any kind needed on the bottom surface of the acrylic.

This was a great idea wild.bill...all one has to do is just lay down some white, thick paper and then the acrylic and start laser burning the text!!
« Last Edit: January 10, 2017, 04:48:41 PM by Administrator »
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ggallant571

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #20 on: January 10, 2017, 06:19:10 PM »
Please post this technique some place safe. Easy for us less skilled/artistic/talented nerds to find.
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HaniC

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #21 on: January 10, 2017, 08:04:05 PM »
OK I was finally able to do some testing using wild.bill's suggestion:

I placed an 8.5x11 inch piece of paper, about the thickness of a 3x5 index card, down onto my mesh screen work area.

I did a re-focus on this paper surface.

Next, I slid my 6x6 inch 3/8 inch thick clear acrylic plate into my lower left work area 'pocket'.

I did some laser burn tests.

I'm happy to report that the burn tests were a great success...!!! The advantages of this technique are:

1. I don't have to mirror my Text since the surface burns are taking place on the 'bottom' of the plate as it lays in my laser machine work area.

2. No tape, no sticky paper, nothing of any kind needed on the bottom surface of the acrylic.

This was a great idea wild.bill...all one has to do is just lay down some white, thick paper and then the acrylic and start laser burning the text!!

Any pictures you can share?

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #22 on: January 10, 2017, 08:27:07 PM »
Please post this technique some place safe. Easy for us less skilled/artistic/talented nerds to find.

I plan to make a video on this process. Two parts. In Part I, I will show all the steps on how I create the .dxf file, the award sample Text, all from within BCL, no outside CAD program needed.

Part II, I will show the acrylic actually being laser burned on the laser machine using my video camera.

I'm attaching a photo of my prototype acrylic plate...the red arrow is pointing to the test burn using the technique of white paper down, then the acrylic plate on top of that...in other words, showing the results of the burn on the bottom!!

It's just beautiful...so easy to see...!!! BTW that was with a 1.6w laser diode...!!!

« Last Edit: January 10, 2017, 08:29:12 PM by Administrator »
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HaniC

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #23 on: January 10, 2017, 09:05:54 PM »
That's a beautiful effect. I wonder if an engraved picture would work with this technique. A nice greyscale or dithered photo would look great when lit up and serve as a nice gift.

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #24 on: January 10, 2017, 09:19:04 PM »
That's on my BCL radar...my co-developer Paul and I are going to be adding the capability for BCL to pull a graphics image into a CAD drawing, something like a .jpg file of a logo or anything really, and then load that dxf file into BCL and be able to mix graphics and Text. I don't have a time line for this, but it's on our to do list.
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nottingham82

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #25 on: January 10, 2017, 09:30:52 PM »
what speed did you try
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Re: Text engraving on 3/8 thick clear acrylic
« Reply #26 on: January 10, 2017, 10:09:55 PM »
I tried many speeds but what worked best on the acrylic from my 1.6w laser beam was a speed of 100mm/min at full power.
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wild.bill

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #27 on: January 11, 2017, 07:07:18 AM »
I tried about 20 different methods yesterday (lots of failures and some just OK) and I am back to the method that you used. The only difference is that I am using a black craft paper because it works much better than the copy paper that I was using a few day's ago. Also the easiest to use - just put the paper down, focus, put the plastic on top and cut away.

I am using the 2.0W TTL laser and I also ended up at 100mm/min to 110mm/min for the speed. By far this is where I was getting the sharpest images. Any slower and it starts to over melt the edges and burns the paper enough that it starts to be work to get the paper off.

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #28 on: February 14, 2017, 05:56:14 AM »
I have some 6" medium tack transfer tape I use for vinyl graphics/stickers.
Will this work? I may try some it comes in lots of different widths
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wild.bill

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Re: Text engraving on 3/8 thick clear acrylic
« Reply #29 on: February 14, 2017, 07:49:49 AM »
I have some 6" medium tack transfer tape I use for vinyl graphics/stickers.
Will this work? I may try some it comes in lots of different widths
I don't have that material so I have never tried it, but give it a try and show us how it works.