Cheap Chinese Laser Engravers are Fun



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Re: Cheap Chinese Laser Engravers are Fun

Postby Jesus Was a Robot » Tue Sep 05, 2017 8:31 pm

crochambeau wrote:
multi_s wrote:here is some low wattage fun maybe you will be into cro-my-beau (scroll down to rusty whale) man (anti?)rusting the the control labelling. that would look hawt. just saying.

https://jenslabs.com/2013/12/16/what-ca ... er-cutter/

here is what you really need though:



I think the reaction I'm looking for is...

MY BONER

jwar wrote:The laser beam does get hot enough and it works fan-fucking-tastic with steel. No doubt about it. However, when annealing steel, which would be close to the same settings as cutting, it causes the opposite side of the steel to oxidize. I'm assuming it's some sort of chemical reaction to the beam, but I've never figured out exactly why. Instant rust and bad, bad, bad.


Oh, hey jwar, I promise I'm not stealing your lines. I just, borrowed it for one second.. see, no scratches or nothing..

While on the surface instant rust sounds like my bag, I agree that it has no place in cutting. Were you introducing any gas?

Realistically, labeling controls through rust would get more of a workout than actual cutting.. at least until I fall in love with square holes. Sort of brings my interest in line with the original Eleksmaker A5 post.


No gases introduced. Just oxygen after the lasering process.

So what I'm assuming is occurring is that while the laser is creating exothermic conditions (which would be annealing or cutting), the steel gets super heated to the point of causing a reaction when introduced to oxygen. So perhaps, and this is just a theory, the rust like conditions only occur when the steel cools too fast or is introduced to oxygen. With the machine I had, it was air tight, so that would explain the rapid interaction.

Again, I'm just guessing here based on my knowledge base.
"My boner"

-Jwar

"You may caress my harem of large velvety hammers any time".

- The Velvet Hammer

"#I'mwithJwar"

-D.O.S.

"Also this thread is now on page 2399, and the pt2399 is the most used delay chip for most dirty delays. Coincidence? therefore 9/11".

-multi_s
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Re: Cheap Chinese Laser Engravers are Fun

Postby culturejam » Sun Sep 17, 2017 10:44 am

Madbean said to me the other day: "Hey, I wonder if plastic knobs can be etched?" So I had to try it. It works, but you really need a larger, flatter knob for it to be useable for anything beyond just a single letter.

The main problem is that while it looks cool when finished, the "black" in the letters is basically plastic soot, so it smudges when you touch it and will eventually wear out/off. So on suggestion of some other DIY guys, I cleaned out the soot and inked the letters with black acrylic paint. Worked very well and was easy to apply and clean up. I'm going to do another wipe down to get last bits of acrylic off the top, but it looks good as is until you really look at it close (ie - while using a pedal, you'd never bend down and put your eyeball right on top of the knobs).

Image
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Re: Cheap Chinese Laser Engravers are Fun

Postby multi_s » Thu Oct 12, 2017 7:34 pm

this finally showed up... have not done anything cool yet though... came with a very interesting set of sample images lol.

Image

Image

Image
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Re: Cheap Chinese Laser Engravers are Fun

Postby culturejam » Thu Oct 12, 2017 9:01 pm

Wow, dude. You are not fucking around with that thing. Is that 60W CO2?
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Re: Cheap Chinese Laser Engravers are Fun

Postby crochambeau » Thu Oct 12, 2017 9:07 pm

multi_s wrote:Image


Is that a trophy of a dog wearing a gas mask?

Nice bit of kit!
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Re: Cheap Chinese Laser Engravers are Fun

Postby multi_s » Thu Oct 12, 2017 9:22 pm

culturejam wrote: Is that 60W CO2?


it claims to be 80w Co2. next week i will see how thick ply can really be cut but ya... it seems to work at least. cant really say much else about it yet good or bad.

here is the item on aliexpress if you wanted to see the details

shipping did not end up being totally free since they deliver for free to a port, then you have to arrange freight delivery from there to your actual address, but even still it was not that much.
crochambeau wrote:Is that a trophy of a dog wearing a gas mask?


hmm pretty good guess id say!
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Re: Cheap Chinese Laser Engravers are Fun

Postby culturejam » Sat Oct 14, 2017 12:56 am

That's a serious piece of kit, my man. Congrats!
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Re: Cheap Chinese Laser Engravers are Fun

Postby Jesus Was a Robot » Mon Oct 16, 2017 7:48 pm

You can measure the tubes output with a tool, but I don't have one. It will tell you if you're getting as much wattages as it claims. I can't imagine they'd lie about that, but who knows. Looks cool either way!
"My boner"

-Jwar

"You may caress my harem of large velvety hammers any time".

- The Velvet Hammer

"#I'mwithJwar"

-D.O.S.

"Also this thread is now on page 2399, and the pt2399 is the most used delay chip for most dirty delays. Coincidence? therefore 9/11".

-multi_s
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Re: Cheap Chinese Laser Engravers are Fun

Postby culturejam » Mon Oct 16, 2017 8:10 pm

Jesus Was a Robot wrote: I can't imagine they'd lie about that, but who knows. Looks cool either way!

The less expensive Chinese CO2 machines are notorious for exaggerating wattage. A lot of the 40W tubes have been measured between 25W - 30W. But considering that the whole machine is only about $500, I wouldn't be too upset by it.
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Re: Cheap Chinese Laser Engravers are Fun

Postby multi_s » Mon Oct 16, 2017 8:27 pm

Yes, that's basically how i feel. I definitely take any spec with a grain of salt and just remind myself i went with the cheapest solution so you do actually get what you pay for often with that approach.
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