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  1. #11

    Re: Plexiglass Cutting - HELP

    A couple of years ago I did a couple of edge lit plexi signs. I had the same issues. I did a bunch of research and tried everything I could find. The one thing that seemed to work the best, besides slowing everything down, was to put a puddle of liquid dish soap over the area where you are going to cut.
    Yes it makes a bit of a mess, (not as much as you would think) but it worked well at keeping everything cool and melt free. And of course, just washes off.
    The material I was using was from Home Depot (Canada) and may not be the same as what you are using, but give it a try....


    Ray
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  2. #12
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    Re: Plexiglass Cutting - HELP

    My friend ordered some name brand Lexan to try. We'll see how it goes next weekend.

    Dan
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  3. #13

    Re: Plexiglass Cutting - HELP

    v bit, engraving bit the worst for acrylic..
    the small diameter tip don't let a lot federate.


    flooding with soapy water makes tool ""slicky"" and chips evacuating better
    alcohol has a great cooling effect as its evaporating very fast..


    from practical view, don't experimenting on a whole sign, but on letters..


    cast acrylic more rigid, brittle and that's cuts better than extruded
    Last edited by cnclurker; 06-09-2015 at 7:54 pm.
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  4. #14
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    Re: Plexiglass Cutting - HELP

    Screw it. Working with plexiglass is becoming very not fun. Chipping, burning, grinding down bits, the smell of plastic... I like projects made of wood!

    This was a project to help a good friend. It's more or less done with marginally successful results. I don't want to make any more of these thought.

    I do truly appreciate all the help though. Many thanks.

    Dan
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  5. #15
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    Re: Plexiglass Cutting - HELP

    Dan - it's all about fun. Hobbies are supposed to be fun.

    I will get into plastics some day, and I will figure it out, but that is the stuff I like - figuring it out.

    There is stuff I do, that many would not consider to be fun. Cutting PVC plastic is not bad, but it is not like wood either.

    Have fun - play with stuff that you enjoy.
    Art and Creativity - Collide with the Functionality of CNC - priceless
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  6. #16
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    Re: Plexiglass Cutting - HELP

    Thanks, Leo. We got pinched up with this project...not a lot of time to get it done and a steep learning curve. I have also been absolutely swamped with appraisal work which has further cut into any practicing/tinkering time on this.

    I too like working through challenges, much more is learned when things don't work out, but this one has just been slow going.

    I am enjoying the retro clock designs and have other sketches in the works. The friend that I'm helping with this project is a true computer guy. He got the CAM software I'm using (www.Jscut.org) set up to run locally on my machine here - so no requirement to use it live in a browser and connected to a server which is the way it is really supposed to be used. So the speeds are much greater and it all stays 'in-house' so to speak. I was hoping to give him a better product though.

    In the process of this project I did pick up some cool extras for this little CNC. I bought a collet set that works great. It will let you use end mills of six different sizes, including the 1/4" router bits/end mills, I was using on my old machine. It holds very well. I have a lot of 1/4" end mills from my tinkering with the DIY drawer slide machine.

    Oh, well, always learning.

    Dan
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  7. #17
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    Re: Plexiglass Cutting - HELP

    Yeah Dan - I didn't wanna push to hard on working through the challenge - but that is part of the fun. Not always though. Pushing through a challenge needs the time to do so, and if the time ain't there - well it just is not just not fun - it is insurmountable. I get those too.
    Art and Creativity - Collide with the Functionality of CNC - priceless
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  8. #18
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    Re: Plexiglass Cutting - HELP

    Just a couple of cents here from another life.

    Try getting all the chip scraped off and then polish the Plexiglas using formaldehyde. The formaldehyde dissolves the Plexiglas so use it lightly.
    Rich
    Huntington Beach, California

    Surf's up
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  9. #19
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    Re: Plexiglass Cutting - HELP

    Thanks Rich. I'll keep that in mind for the future.

    Here's the sign after a lot of trial and error. (It's for a military guy so I blocked out the name).

    The blue lights help it stand out a bit and the base came out acceptably well.



    Dan
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  10. #20
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    Re: Plexiglass Cutting - HELP

    WOW DAN - that is fantastic.

    How can you NOT be happy about THAT?

    That is on my todo list - but you beat me to it.
    Art and Creativity - Collide with the Functionality of CNC - priceless
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