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  • VDX's Avatar
    Today, 02:05
    ... some sort of sensor/detector (e.g. camera, photo-transistor or some "sensitive" material for "burning tests"), measure signal with direct illumination an then put your test-sheet between -- and look, if the signal lowers significantly :cool: Viktor
    18 replies | 139 view(s)
  • fuzzy's Avatar
    Yesterday, 17:32
    To the main topic: I just bought some cheap 352nm torchlight and will be testing if scotch tape is transparent at this wavelength. If it's fully transparent at 352nm, my only remaining option would be galvo CO2. If it's absorbing a reasonable amount, I will consider buying a galvo 352nm...
    18 replies | 139 view(s)
  • fuzzy's Avatar
    Yesterday, 17:28
    Looks terrific! galvo + CNC is a great combo. Recently, an even better one has become somewhat affordable: laser + 6 degrees-of-freedom robot arm. That allows to go beyond x/y/z and beyond flat objects, but more heavy on software. galvo + XArm6 is the route I am currently seriously...
    18 replies | 139 view(s)
  • VDX's Avatar
    Yesterday, 16:31
    ... this was a 200W@975nm laserdiode, with some microsecond long pulses (IIRC 3Ás), at below 100 Watts of power, on a spot of maybe 0.2mm. Here its burning through a tile - https://www.youtube.com/watch?v=nVsZ07bP-AM Have some of them to combine up to 1.2kW on a 0.4mm-spot :cool: --- ...
    18 replies | 139 view(s)
  • fuzzy's Avatar
    Yesterday, 15:26
    Got it, thanks! These 445nm diode modules are amazing. Yeah. In my case, there are three primary materials: - corrugated carton; light brown. I kind of able to get through it with my fiber laser, but it mostly burns than ablates. - thermal shipping labels. Bright white. It's extremely hard...
    18 replies | 139 view(s)
  • VDX's Avatar
    Yesterday, 13:53
    ... the 2W to 6W laserdiodes were blue 445nm-diodes, focussed on spot diameters around 0,1mm. The fiberlasers were at 1064nm and cuts coloured/dark paper or adhesives without problems, but could be problematic with white or transparent materials. For samples/images -- read through this thread...
    18 replies | 139 view(s)
  • absolom7691's Avatar
    Yesterday, 12:54
    absolom7691 replied to a thread Static Lumia pics in Lumia
    Here are a few projections from my lumia. In person, the colors are super vivid and bright. Best I could do with my cell phone... A video of the dimple tube. It looks soft because I could not get my phone to focus. I may have to get out the dSLR for better results Here it is, it...
    22 replies | 1592 view(s)
  • fuzzy's Avatar
    Yesterday, 12:46
    The fiber laser itself is fine; I have no problems engraving steel / aluminum / brass. As for parameters, it's certainly possible that I just failed to find the right combination of frequency / power / speed. If anyone has a hint, I will very much appreciate it.
    18 replies | 139 view(s)
  • absolom7691's Avatar
    Yesterday, 12:44
    absolom7691 replied to a thread Static Lumia pics in Lumia
    I like it! The term definitely fits! My next post I'll have a short video of my dimple glass. Ions are still king when it comes to uniform divergence, beam quality, and of course, there is no mucking about trying to get your beams lined up to get a good white. Also, the range of wavelengths...
    22 replies | 1592 view(s)
  • mixedgas's Avatar
    Yesterday, 12:37
    IF THAT IS aLL your fiberlaser did at 20 watts, it sounds like it was not programmed correctly, set up properly, damaged, or driven with the wrong signal. Was there an F1 lens in front of the fiber to focus the light? STEVE
    18 replies | 139 view(s)
  • dkumpula's Avatar
    Yesterday, 11:23
    I took a look at the satellite view of Grainger Performing Arts Center in Kinston, NC and see a couple pros and one major con. Pros include a community center and gymnasium right next door. There is also a small park behind the PAC that might be suitable for droning activities. The con is that...
    40 replies | 695 view(s)
  • fuzzy's Avatar
    Yesterday, 10:18
    Hi Viktor, Speaking about the 20W pulsed fiber laser: which wavelength? I did try using 1065nm 20W Q-switched fiberlaser to no availability. It would not cut tape or paper at all. At best, I could burn paper (very slowly). Same question about laser diodes: which wavelength? Also, if you...
    18 replies | 139 view(s)
  • fuzzy's Avatar
    Yesterday, 10:13
    That would be amazing! Thank you in advance. Unfortunately, the boxes are from multiple third-party vendors (mostly from China). There's a zero chance we can influence them to change the box design.
    18 replies | 139 view(s)
  • VDX's Avatar
    Yesterday, 10:05
    ... I've done cardboard ablating, engraving and cutting with blue 2W, 3.5W and 6W laserdiodes or 85Watts CW- or 20Watts pulsed (20W averaged from 10kW pulse peak power) fiberlasers - the more power, the faster. What's another problem with "undefined" materials -- if you cut through, theres's...
    18 replies | 139 view(s)
  • mixedgas's Avatar
    Yesterday, 10:02
    I'd laser perforate/ ablate with a zillion tiny holes, then follow by a knife. I know that is/was feasible in the cigarette industry at one time. I just don't know whom, what, when, where and how. I go to church with a fellow who designs boxes, and I'll ask him. I know they use C02 for some...
    18 replies | 139 view(s)
  • fuzzy's Avatar
    Yesterday, 09:55
    I do speak with 3 vendors at the moment including IPG, but it seems that for a random person from the Internet like me, it's easier to get a quote from them than a fair advice. It's still something that I keep doing in parallel to asking for independent opinions. This is not a bad idea,...
    18 replies | 139 view(s)
  • mixedgas's Avatar
    Yesterday, 09:46
    I've never had the chance to do ablation of cardboard, Which is why I'm sending you to professionals. Not the answer you wanted, I know. Don't rule out diamond wire saws, either. Steve
    18 replies | 139 view(s)
  • fuzzy's Avatar
    Yesterday, 09:17
    Hi Steve, thank you for your thoughtful reply! Blade-based solutions are widespread in the industry, so yes - it's known to mostly work. The issue is that nobody succeeded in making a reliable box opener that way and a human is always needed. In our application, human help would only be...
    18 replies | 139 view(s)
  • mixedgas's Avatar
    Yesterday, 09:00
    Given the critical nature of your application I would have a chat with the Applications Lab Engineers at Synrad (Co2) , IPG (fiber) , Light Conversion (Femtosecond) and Coherent / Spectra Physics for UV and Excimer. This is by no means an exhaustive list. It sounds like you want to ablate...
    18 replies | 139 view(s)
  • fuzzy's Avatar
    Yesterday, 08:41
    Ceramic blade would be a good idea, but unfortunately it's not possible to control the "quality" of the incoming boxes. Some of them have metal stables in addition to tape. By the way, this is how state-of-art blade-based box opener machines look like: They are not very reliable in what...
    18 replies | 139 view(s)
  • Bradfo69's Avatar
    Yesterday, 02:47
    what? ..........
    40 replies | 695 view(s)
  • VDX's Avatar
    Yesterday, 00:34
    ... laser-cutting depends on wavelength, power and absorption rate inside the material -- some hundred Milliwatts on a focus as of 0,1mm diameter are enough, if the wavelength will be absorbed ("dark" or UV absorbing material) ... but all the safety/precaution measures will render this...
    18 replies | 139 view(s)
  • fuzzy's Avatar
    05-23-2020, 22:05
    Greetings laser gurus! I am a laser noob with limited hands-on experience with CO2 and fiber lasers, but no theoretical background, and currently trying to solve a practical problem: I need to build a robotic system that would open corrugated cardboard boxes arriving to a distribution center....
    18 replies | 139 view(s)
  • james's Avatar
    05-23-2020, 16:25
    SpiderPlayer is just a simple wave player that knows how to play multichannel waves. Just navigate to the file folder with the waves in it. Every time you double click one Windows opens it in the currently running SpiderPlayer. You should spend some time looking at everything LB can do. It's...
    8 replies | 156 view(s)
  • tboultwood's Avatar
    05-23-2020, 08:59
    Thanks James, ill start by saying thank you, you've supplied me with hours of entertainment. If your ever in the UK hit me up and ill get you a couple of beers! Perfect suggestion, i haven't checked it out yet but i assume its essentially a tilling audio player..? Which is half way there. I...
    8 replies | 156 view(s)
  • HankLloydRight's Avatar
    05-23-2020, 08:49
    Yup! I'm already testing one of those boards and I intend to migrate to it for my next iteration and eliminate the stand-alone BT board: https://www.amazon.com/gp/product/B079PVCF2G
    8 replies | 156 view(s)
  • HankLloydRight's Avatar
    05-23-2020, 08:45
    eh, they can't hear so well anyway. ;)
    40 replies | 695 view(s)
  • tboultwood's Avatar
    05-23-2020, 08:38
    Hello, yes almost. I can actually convert the ild files to memory for use on an Arduino as i have added an SPI interface. It was more of something to mess around with i suppose creating the ild files in the first place. Not like some of software you might find professionally (though maybe i should...
    8 replies | 156 view(s)
  • tboultwood's Avatar
    05-23-2020, 08:31
    I have had a little play with these this afternoon, definitely a start, its tempting me to maybe utilise my day job and make something that i wouldnt say better, but almost 'more customizable '? a lot more sliders so i can manipulate lots of functions and mix equations together? I would alsost be...
    8 replies | 156 view(s)
  • james's Avatar
    05-23-2020, 08:20
    If you create a bunch of nice little waves of various patterns, you can use SpiderPlayer or a similar wave player in loop mode. If you associate the .wav file extension to SpiderPlayer, and you have named all of your waves with good descriptive names, all you need to do is double click away. Each...
    8 replies | 156 view(s)
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