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  • VDX's Avatar
    Today, 06:01
    ... this was with a fiber-laser, so as simple, as setting the power and TTL/PWM-pulses to let it burn. The controller was an E1701D - http://halaser.de/e1701.php Actually I'm programming a similar XY-galvoscanner system with a blue 6W-laserdiode (for engraving foam materials) with one of my...
    36 replies | 768 view(s)
  • dar303's Avatar
    Today, 03:04
    Very nice! What kind of driver for the diode and software for the scanners do you use to produce this?
    36 replies | 768 view(s)
  • Bradfo69's Avatar
    Yesterday, 04:41
    Been to all of these. Why limit yourself to just the US? There's also the UKLEM and CaribLEM which are both great as well as the DutchLEM that I still hope to get to someday. There was also a SoCAL LEM many years ago and there was another one planned in the Great Lakes region but, I don't...
    4 replies | 178 view(s)
  • VDX's Avatar
    Yesterday, 00:03
    ... if a square size of 40x40mm (or 40x300mm) is enough -- I have some ten mirror-stripes with 30x200 or 40x300 from old kopiers, what are such "first surface" types :cool: Viktor
    2 replies | 109 view(s)
  • Bradfo69's Avatar
    04-04-2020, 18:12
    You"re going to want to look for what's called a first surface mirror. Meaning that the mirrored face is on top of the glass. That's a little different from a normal mirror where the mirrored surface is on the back side of the glass. Another words, you don't want the beam to travel through the...
    2 replies | 109 view(s)
  • 10Fenny's Avatar
    04-04-2020, 16:57
    There is also nwlem in the Portland Oregon area
    4 replies | 178 view(s)
  • Kingsoflight's Avatar
    04-04-2020, 15:14
    Interested PM sent.
    7 replies | 753 view(s)
  • BazookaBo's Avatar
    04-04-2020, 12:27
    I'm planning to use some mirrors to beef up my hobby show :) I'm thinking about like 8 or more that I mount in different places in my space. Will cheep stuff like this work at all?...
    2 replies | 109 view(s)
  • HankLloydRight's Avatar
    04-04-2020, 04:53
    There's also NELEM in West Newbury MA. The last one was in 2018, so maybe it's time for another later this year (virus permitting)?. See: https://photonlexicon.com/forums/showthread.php/27190-NELEM-V-September-29-2018! Also, one of the co-hosts is PL member "planters" who runs this...
    4 replies | 178 view(s)
  • Lazerjock's Avatar
    04-04-2020, 03:50
    On the east coast I attend SELEM & FLEM (Florida).
    4 replies | 178 view(s)
  • lasermaster1977's Avatar
    04-03-2020, 11:29
    I've heard about TEXLEM and SELEM, but are there others in the US? Thanks
    4 replies | 178 view(s)
  • VDX's Avatar
    04-02-2020, 13:35
    ... this was with a "pulsed" 20Watt fiber-laser and XY-galvoscanners ... here a video removing the paint from a PCB and then burning through the copper to engrave a QR-code :cool: https://www.youtube.com/watch?v=sxBJtnqhuYw Viktor *** EDIT *** - for the power -- the "20 Watts" is the...
    36 replies | 768 view(s)
  • rns0504's Avatar
    04-02-2020, 12:02
    rns0504 replied to a thread Positive Thinking in The Lounge
    And yes Adam I've switched to the dark side.... that truck does NOT have a bow tie on the front! I've been getting some work done on my old Chevy as well during the evenings... cut out all the IFS junk and fitted an axle from a 79 F250 in its place... That welding and fabrication class sure is...
    1 replies | 212 view(s)
  • rns0504's Avatar
    04-02-2020, 11:57
    rns0504 started a thread Positive Thinking in The Lounge
    Amid everything going on, would like to hear some positive things from our community. Getting frustrated at hearing all the negative. Anybody have any exciting projects going on, or new opportunities? Doing anything fun in any (new found) time off? I've taken the opportunity to head out to...
    1 replies | 212 view(s)
  • dar303's Avatar
    04-02-2020, 11:57
    hehe, found this while looking for drivers...20.000W laser drivers, 4x160Amps plus controller very cheap if you are int the US https://www.ebay.com/itm/NUVONYX-GLG-4X-4-LUMINA-POWER-LDD-5000-160-3-LASER-DIODE-DRIVER/383487329613?hash=item5949a0454d:g:BEMAAOSwhixdnKLD#viTabs_0
    36 replies | 768 view(s)
  • dar303's Avatar
    04-02-2020, 11:25
    Very cool! And expensive! :) I saw a picture on the German forum where you directly etched a copper PCB, what wavelenght/power/pulse rate did you use there? It looks like raster scanning, was it done with galvanometers or X/Y stage?
    36 replies | 768 view(s)
  • clickamouse's Avatar
    04-02-2020, 10:55
    Greetings, all; Here is some info about a "laser show" I will be doing April 3 online. One man's struggle to cope with the Covidian Crisis. Background Since 2013, Illuminatus Lasers has been a fixture of FoolMoon, an Ann Arbor light festival/art event. We started on the roof of the...
    0 replies | 226 view(s)
  • VDX's Avatar
    04-02-2020, 10:06
    ... search for "optical isolator" - https://en.wikipedia.org/wiki/Optical_isolator#Polarization_dependent_isolator Viktor
    36 replies | 768 view(s)
  • dar303's Avatar
    04-02-2020, 06:38
    Very cool technology, do you have a picture how it looks?
    36 replies | 768 view(s)
  • dchammonds's Avatar
    04-01-2020, 20:30
    Yes, there are restrictions in place, but people NEED to heed them!
    76 replies | 3624 view(s)
  • carlos3621's Avatar
    04-01-2020, 17:52
    Approximately 20,000 people die every year from the FLU, their are restrictions in place to limit this version of the FLU from spreading. have faith people!!
    76 replies | 3624 view(s)
  • VDX's Avatar
    04-01-2020, 14:23
    ... this should be control/loop sensors -- don't know any system fast enough to prevent overpowering with back reflection. The "Faraday-isolator" in the kollimator heads of the pulsed fiberlasers works "passive" - it's a nonlinear crystal in a strong magentic field, which is changing the...
    36 replies | 768 view(s)
  • dar303's Avatar
    04-01-2020, 13:22
    Have you hacked the back reflector detectors on some of the diodes to use the signals in your own builds? Oh, I want to ask a few questions about the feedback sensors inside the unit! There are a semi reflective glass plate and two sensors, there was a small glass cube loose inside the unit...
    36 replies | 768 view(s)
  • kecked's Avatar
    04-01-2020, 07:01
    I'd still like to see a streaming platform from the internet to ilda. Problem is it needs security or everyone can record it....Can't stop adat. I think an app that receives the data via the web and then sends out a play only stream to a dac could work. We still have he music rights issue to...
    44 replies | 4832 view(s)
  • HankLloydRight's Avatar
    04-01-2020, 05:15
    VR is great, but that still leaves one big question: How is Brad going to cook his amazing meals for us all!?!??! :eat::plate::pizza::bowl::starving::beer::knife::cake:
    44 replies | 4832 view(s)
  • Shadow's Avatar
    04-01-2020, 04:57
    Pretty much a videogame. Like VRchat. Running a server would be easy enough and anyone could join. Just need a custom map designed that will look similar to past LEMs. I'm not 100% sure but I believe you can play videos in it while everyone is there so a good way for people to play their shows via...
    44 replies | 4832 view(s)
  • VDX's Avatar
    04-01-2020, 04:55
    ... if for the exploded fiberlasers -- this are mostly CW-fiberlasers without Faraday-isolator in the kollimator head - here, with too much back-reflection, some or all of the fiber couplers may overheat within Nanoseconds! Had two occasions with two of my CW-fiberlasers, where they stopped for...
    36 replies | 768 view(s)
  • kecked's Avatar
    04-01-2020, 04:04
    8000 people die normally everyday on average in the USA. So essentially this will double the death rate for about 2 weeks. 8000*12.5=1000000. There are 330M people in USA. Thatís 0.03% of the population. If the death rate for covid is 1.5% that means 100000=1.5% infected so 98.5% didnít die of...
    76 replies | 3624 view(s)
  • kecked's Avatar
    04-01-2020, 03:47
    Wow thats a lot of damage. Wonder if it would be worth putting the fibers in a secondary jacket to catch all the combustion products. Thinking a larger diameter soft copper tube like refrigeration tube. You could the add a pressure escape outside the box through a cotton filter. Now if it goes...
    36 replies | 768 view(s)
  • dchammonds's Avatar
    03-31-2020, 19:38
    And now we return to the Gloom and Doom Channel where we'll hear our blue tasseled buddy Zerubbabel deliver an important end time message... His garments get rattier and filthier with every video...*retardo
    76 replies | 3624 view(s)
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