bigdarkspot

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bigdarkspot
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  • I wouldn't replace it with a resistor (just saw that question in your post). If you did, your setpoints will change all over the place based on the temperature of the room you're in, either allowing fluid into the exchanger when it's not hot enough…
  • The voltage due to current through the series/parallel circuit including the thermistor, it's parallel resistor, and both the setpoint pots is subtracted from the buffered thermocouple voltage (once for each setpoint) to trigger 555 timers for the h…
  • It appears to function as the cold junction reference for the thermocouple circuit. Without digging in to the details, I couldn't tell you it's temperature coefficient.
  • Retired that one unit, using it for parts. Still haven't played with the Luxim device, but now am considering some different mods. We'll see how that works out.
  • I've never heard the fault noise come from anything but the mirror. It's possible that the logic network driving the 'Enable' pins on the 8-bit latches that drive the motor chip has a fault in it, causing it to respond to the wrong data bits on the…
  • Just something to check. I had a similar, but more intense, problem on a Trackspot that hit my shop recently. It was only one of the motors, the gobo wheel motor, but it jumped around like crazy rather than moving in any particular direction. I w…
  • I heard a rumor a little bit ago, that Lightparts was working on an LED upgrade for the Trackspot... not sure if they ever got it finished, or put it on the market. I would check with them. That said, the Trackspot powers its lamp with a low vol…
  • figured it out... bad connection to the pump... I must've reconnected the pump badly multiple times, because I disconnected the leads from the phoenix connector multiple times to test the pump, but this last time, when I reconnected it, it started…
  • ok, so now i'm even more baffled. I have 2 mainboards.. one from my unit, and one from a freind's (muvement on this board). On my board: I replaced the opto, the SCR, the diode (D4). The pump works if connected directly to 110V. When the fo…
  • Turns out it's not the pump. Supplying power temporarily directly to the pump causes it to work (found this out accidentally by shorting the SCR with a meter probe while trying to measure the output of the SCR). I actually think the problem migh…
  • I love how somehow trackspots became like geese, and hang out in gaggles... I know I always refer to a group of them as a gaggle.. maybe i spread it to you, or you spread it to me.. who knows...
  • I don't know about the gobo size, or gobo holders, might check with LightParts, they may know. If you find out, let me know... The Protocol Translator is fairly rare, i managed to find an almost new one about a year ago from LightParts, but it's…
  • Used to work on vidicon video tube cameras just out of High School.. the High Voltage doesn't bother me that much . Anyway, I think, since I was able to pass data with the strobe energized while it was on the bench, but not while it was on the tr…
  • Thanks for the input. I don't believe the wiring or the connectors to be bad, since unplugging just the AC (and thus de-energizing the relay) allows dmx to loop through perfectly, it's only when the strobe is plugged in, and the relay is energized …
  • i have a couple bottles, and my nebula is in pieces... not sure if i want to get rid of them or not, as I may eventually fix it (got a source for nebulizer stems? i have a broken one). I spoke a while back with the guys at Froggy's Fog about ma…
  • wierd, never seen a trackspot with motor brakes... even my newer models seem to have spring plungers...
  • you mean these:
  • I've never had a problem connecting different versions with the sound to light. I notice, however, that older versions seem to have slightly different Mspeed calibrations and wheel rotate speeds, so it may not do exactly the same thing (might not m…
  • heh, and the elation is a re-branding of the Sunlite software by Nicolaudie, not the other way around...
  • I really like my Enttec dongle and Chamsys Magicq software. I wish i had hard handles to grab, but at least it works well and is reliable.
  • Divine lighting sells Eiki lamps, not the original HES ones (at least they're the ones I received when I ordered). Granted, they do seem to last longer than other ones i've tried, and don't seem to cause the sockets to corrode either. The Divine…
  • Actually, I removed the battery, and the traces seem perfect. I know a little about NiCds and my guess is that since the controller was unused (and unplugged) for the better portion of a year, it probably just became over discharged, and reversed p…
  • On closer inspection, it looks like the battery has gone bad. Any idea what type of batteries these are? It appears to be a 3 cell (4.5v?), but i'm not sure what chemistry the battery is. (NiCd?). Would this cause the error I was seeing?
  • I'd love to know
  • I'm on the same side as Joe, mostly. It sounds like this is a one-off dance party. I do a lot of events like this, from very small shows with 4-8 movers, to large multi-day fesivals with 50+movers. The one thing to remember about a show like th…
  • Also, do you have a lightwave controller (Universal, Trackspot, or Intellabeam all work for the trackspot)? If so, try seeing if it responds to that. The reason I ask, is with all switches off, it should be in Lightwave mode (and you've implied …
  • I had a similar issue recently, and it turned out to be the register IC used to read the dip switches (IC6). I replaced it, and the same thing happened. After futzing around a while, I replaced it again, and it was fixed (must've had a bad part th…
  • hehe, neil, that's the second time you've done that.... responded to a message I posted stating that I'm having the same problem... oh well... cracks me up, though
  • That looks sick... Love the big mirror balls...Almost got one of them (48") for the club I work at a few years ago, but the boss-man didn't want to spend the money.
  • Thanks tim... I clearly need to check this board more often, as I just noticed your description. That helps alot. Think I'll have a look this weekend, and maybe I can get my last 2 remaining emus back in working condition. Thanks, Jeff
  • I'm in Seattle. What was the problem with the power supply board? I'm usually pretty good at diagnosing and repairing electronics, but for some reason these power supply boards confuse me.
  • Recently have been using generics. The odd thing, though, is that only 3 fixtures have the problem and they have it chronically. The same lamps in other fixtures don't have the problem. After I replace the sockets again, I'll try using name bra…
  • "The pointy end of a lawyer or three..." made me laugh.
  • I occasionally see link cards posted in various places. I think Lightbroker might still have a few listed.
  • Might want to try replacing ic6, I had one behaving similarly, and that was the fix. If you have a DSO, you can test it. trigger on pin 19 of ic6, then probe each of the output pins (which are the same as the D0-D7 data lines on the processor). …
  • I haven't had to do it yet, but will need to soon. From what I can tell from the web it appears that Acetone will soften loctite, which may help. The problem is getting the acetone to penetrate through to the loctite that's way down inside the t…
  • Yeah, it would have to have a different power supply. The Luxim device doesn't need an igniter. I'm working on the power suppply issues right now, may actually replace the entire PSB with a custom one, since the logic board only needs unregulated …
  • I know all about working with high voltage... way back in the day, I used to work on Vidicon (tube) video cameras... way more dangerous than anything in an emulator.
  • That's the thing about the Luxim device, it's way safer than any Xenon lamp, runs off 28VDC, and I could get rid of all the high voltage and high pressure inside the fixture.... a safer, brighter, longer lasting emulator...
  • I've been wanting a broken emulator to play around with this Luxim device for quite some time, but wasn't willing to sacrifice one of my working models yet, but it looks like perhaps fate made my decision for me. I may look to buy another working…
  • Well, it looks like the problem is the PSB. Now I need to make the decision as to whether to replace the PSB, or to replace the entire Xenon system with some new tech....
  • Thank you.
  • Yes, both. I don't have any spare boards at the moment. I was going to swap logic boards between a working unit and the bad unit and see which one works when I'm done. If the working unit continues to work, then the problem is with the PSB, if th…
  • I mean the logic board. There is a signal from the logic board to the PSB (P13 pin 4) that should ramp up from cutoff at 1/3Vcc to strike at 2/3Vcc. At the moment, that voltage never gets above 1/3Vcc, so the lamp portion of the power supply is ne…
  • Actually, after further investigation, It almost seems like the problem is not with the PSB. There is a circuit that uses a stepped voltage from the mainboard to cycle the PSB from off to strike, to normal operation. This stepped voltage doesn't s…
  • Yeah, emulators try 4 or 5 times then give up... In any case, I don't think there should be AC on the lamp at any time (from my understanding of Xenon lamps, AC is actually damaging to the electrodes).
  • Understood... that's why i tested just after strike...
  • Ok, got to dig in a bit more on this now that i'm back from vacation. Looking accross P1 (the connector between the PSB and the igniter/lamp) I see about 50 or so volts DC at power up, and it tapers off to around 20 or so volts as expected. If I s…