Latest plexi 3d

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Re: Latest plexi 3d

Postby johnnydoughey » Sun Feb 01, 2015 7:08 pm

Great work as always, Xxray...

I've attempted to do the 3D on plexi, but my machine's maximum's feed is about 150 ipm (I have reduction gears... 7.2 to 1... for more precision) and a milwaukee router with a minimum rpm of 10,000 rpms. I just added a mount for a dremel, so I will hopefully be able to cut plexi rather than melt plexi. :mrgreen:

Meanwhile, I'm curious... what rpms are you using at the feed speeds of 200 and 250 ipm. Also, do you (or other members) know of any sites which might have various ratios of rpms, feed speeds and bit sizes for good cutting for woods, plastics, etc.?

Perhaps the group might be able to come up with some good data to make a chart if we submit what is working for us on various material.
Just a thought...
Again, nice work indeed!
Bill McGuire
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Re: Latest plexi 3d

Postby martin54 » Sun Feb 01, 2015 8:22 pm

Perhaps the group might be able to come up with some good data to make a chart if we submit what is working for us on various material.
Just a thought...
Again, nice work indeed!
Bill McGuire


Be more difficult to do that than you think Bill, not that I am saying it is a bad idea but there are so many variables to consider, I use the manufacturers recommended settings for speed, feed & material as a starting point & then fine tune from there, plenty of chip load calculators on the net as well to help but it will always come down to the actual machine being used to some extent & what the operator considers to be an acceptable finish.
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Re: Latest plexi 3d

Postby Xxray » Sun Feb 01, 2015 10:43 pm

I'd say that a good sharp bit is more important than feeds or RPM's, just run as fast as you can with slow RPM's as possible and should be Ok.
The code will only move so quickly with 3D anyhow, with alot of Z movement feed is relative.
Doug
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Re: Latest plexi 3d

Postby usLEDsupply » Sun Feb 01, 2015 11:25 pm

Sometimes when cutting or etching acrylic we spray some soapy water on it while cutting with a Windex bottle and it helps keep it from re-welding if you don't have a sharp bit or the speeds aren't fast enough
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Re: Latest plexi 3d

Postby martin54 » Mon Feb 02, 2015 2:14 am

usLEDsupply wrote:Sometimes when cutting or etching acrylic we spray some soapy water on it while cutting with a Windex bottle and it helps keep it from re-welding if you don't have a sharp bit or the speeds aren't fast enough


Does that not give you a problem with chip extraction? I would have though it would be quite difficult to remove damp chips that were all stuck together, mind you my dust extraction isn't very good to start with, but maybe it wouldn't bother a decent system
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Re: Latest plexi 3d

Postby usLEDsupply » Mon Feb 02, 2015 6:30 am

the only times i really do it are when i am carving a design into the acrylic or if i am cutting out small one off parts so i don't really know how the dust collector would handle it. if i am doing thick parts or larger runs i just spend the time to put a sharp bit in and adjust the feeds to get nice big chips.
if your bit has more than one or two flutes you may want to get an up-spiral one as the less flutes the better for low feed rate cutting
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Re: Latest plexi 3d

Postby bill_w » Wed Feb 04, 2015 9:34 pm

Excellent work, very well done
Computers-Yuk....I should junk it...It never does what it should do...only what I tell it.
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