Jump to content

HELPPPPP


Ponddude
 Share

Recommended Posts

I need a little help here. I bought all this DMX stuff because I knew I would find it nearly impossible, and I was right. Let me explain what I have going on here.

I got the iDMX. My original one was broken and as per usual the outstanding customer service from LOR got me a new one to my house in 2 days. The new one works fine...as far as I can tell.

Now, I also got one of my DMX lights in, the Chauvet MinSpot. I have configured the iDMX, using the "E0" unit ID that it comes with. I power up my moving spotlight, plug in the DMX cable and made sure that the DMX address of the unit was "1". The LOR HU finds the iDMX and when I enter the console I put in the unit idea of E0. I also set my moving head to only 5 channel operation (at least for now). When I use the HU or the short sequence I have created in the SE, I don't get anything happening on the DMX head. I tried the polarity switch on the iDMX and one again nothing happened. Am I doing something wrong? Does anyone have a MinSpot that can help me out?

Personally, I think the light is broken, but please confirm this before I go a hurt someone at Chuavet.

Any help would really be appreciated.

Link to comment
Share on other sites

make sure the cable is plugged into the correct connectors. The male end of the cable into the iDMX and the female into the fixture. - this is a very common problem

Also make sure the shutter is open - channel 3 on the MiN Spot

how are you powering the iDMX?

Link to comment
Share on other sites

iDMX is powered via a controller. The controller is working, I get the status light blinking and solid.

The cabling is also correct, I checked that about 12 times...lol

How do i go about checking if the shutter is open? How do I get to channel 3 if I can't get any commands to the unit at all?

Yes the unit works in stand alone mode.

Link to comment
Share on other sites

I changed it and still get the same result.

The light is funny. When it is on the DMX universe, after about a minute the light spins around into one particular spot and scrolls through all of its colors and gobos. Once that happens I have to reset the controller.

Any more ideas?

Link to comment
Share on other sites

is the fixture self terminating? do you have a terminator installed?

the moving and spinning of gobos, etc is usually a calibration step that occurs at power up

have you updated the firmware on the iDMX?

have you tried the iDMX by itself with no controller? ( you will need a 12v wall wart)

Link to comment
Share on other sites

Hmmm...I am not sure if it is self terminating. Does anyone know if the Chauvet Min Spot is self terminating?

I also haven't tried updating the firmware, which I will do.

The spinning gobos and colors are very interesting. The fixture has a "DMX heartbeat" light. When it is plugged in, the light initially does nothing. Then, after about a minute it does a complete 360 and begins to stutter in one place with the gobos spinning. The heartbeat light isn't blinking as well.

Link to comment
Share on other sites

I was looking at the manual http://www.chauvetlighting.com/products/manuals/minspot_ug-104.pdf

on page 13 you should be able to change a setting so you can test the min spot in an auto mode to make sure it is working properly. i just got an intimidator 2.0 in today and im fixing to try it out in a bit. how bright does the min spot look? i was leary of getting that because a couple people have said that it is not bright enough for them but others have liked it.

Link to comment
Share on other sites

I also found this about the terminating
[align=left]Termination reduces signal errors. To avoid signal transmission problems and interference, it is always advisable to connect a DMX signal terminator.[/align]
I think that if you do not have it sitting around a whole bunch of other electronics it should be okay, but if you have a transmitter on and cell phone and all kinds of stuff around you might need the terminator. but besides that i do ot know anything about the idmx. i do not have one yet.

Link to comment
Share on other sites

So far the light is extremely bright. The real reasons for buying this so early was 1. learning the DMX world and 2. so I could begin sequencing. I want to put the light outside and figure out how far it should pan and tilt. So far, that hasn't been going so well.

I will get a terminator tomorrow.

Link to comment
Share on other sites

Ponddude wrote:

So far the light is extremely bright. The real reasons for buying this so early was 1. learning the DMX world and 2. so I could begin sequencing. I want to put the light outside and figure out how far it should pan and tilt. So far, that hasn't been going so well.

I will get a terminator tomorrow.


you can make one - it is a 120ohm resistor across the data pins 2&3. solder to a 3pin xlr

What cable are you using to connect the spot to the iDMX? Check the cable to verify it is good ( pins not swapped or pin 1 grounded out)

As i never have powered the iDMX from a controller - I would think there may be an issue with the controller not supplying enough power to the iDMX.
Link to comment
Share on other sites

Well this story just keeps getting more interesting.

When I got home tonight I jumped back in. If I switch over to 13ch on the DMX light then things were working great, just like they should be, for a while. Then, I go and get a drink and come back and the light has put itself into self destruct mode and is stuttering, flipping through all the light colors. Now I know it is not the light and not the iDMX....both are clearly doing what they should be.

Tomorrow I am going to get a wall wart and a terminator and we will go from there. Thank you everyone for the great help!

Link to comment
Share on other sites

I did quite a bit of testing with my iDMX powered from just the USB485B... Two separate iDMXs ran the whole season just powered from adjacent controllers, but in both cases, there was less than 5 feet of cable from the controller to the iDMX, and there were multiple controllers nearby that could contribute power...

I will say that it appears that some DMX hardware is just as robust as LOR about running without terminators, to the point where they aren't even recommended, and other hardware just about requires termination...

Also, if the fixture is acting like termination is an issue, it might also be a good idea to look into DMX cable instead of microphone cable.. The O-ring sealed outdoor DMX cables I'm using aren't cheap, but they do seem to be a first rate product...

Link to comment
Share on other sites

Maybe you said this already, but did you try changing the polarity on the iDMX? I had this exact problem at our Hospital display - after a few days and every test I could think of, I read a small blurb about polarity in the iDMX. Flipped the switch on the iDMX, everything worked perfectly. And then I kicked myself for wasting 2 days.

Good luck!

medman2000

Link to comment
Share on other sites

Well after about a whole day of troubleshooting I have come to the conclusion that it is my light that is broken. Several things happen that lead me to this conclusion. I did everything that you people told me to try...bought a wall wart, added a terminator, updated the firmware, move the light away from anything that could cause interference...I even bought a 45 dollar cable...nothing changed how the light functioned. I know that the iDMX is working fine because for the few seconds that the light does work, it works fine. There is a signal light on the Min Spot that should blink steady when it is receiving a signal from a DMX controller. That blinks in very odd patterns. Usually it isn't even on at all. This tells me that it just isn't getting the signal. What is even more interesting is when the terminator isn't installed the light has more of a chance of getting a signal. When it is in, it never gets a signal.

I am going to call Chauvet on Monday and see what they say. Thanks everyone for the help!

Link to comment
Share on other sites

  • 2 weeks later...

I thought I would update everyone on what actually happened with my light just in case somebody else is having the same issues.

My first problem was the fact that my iDMX was broken. As per usual, LOR Support was amazing and I had a new one in my hands within one day. You can't ask for anything better then that!

Once that was working I was still having problems with my light. I ended up contacting Chauvet and they had me do a few things to the light, powering off and on cycles, which eventually didn't do anything. Their support was surprisingly helpful as well. Once they figured out that something clearly was not working, they had me send the light back. Today I got the light back and the fixture itself had a bad DMX input. They replaced that and sent it back to me. Now the light is working perfectly and has been running all day long with no issues what so ever.

One thing I learned from this is please remember that a terminator is a must. Chauvet had me use it and when I did use it things worked better, but not great. That is when they figured out something was wrong with the input. One thing that I find, especially with the MiN Spot is that it does not like a lot of "noise" around it. The light is next to my computer with my monitor and that seemed to hurt it as well. Chauvet had me move the light away from this stuff, again nothing worked. Even now that it is working fine, when it is near all the electronics, things really seem to go a little fishy. Once the terminator is in, it works great.

DMX really adds some nice things to displays and I can't wait to keep adding more fixtures to my display.

Link to comment
Share on other sites

Thank you for the update.. Glad to hear you have it resolved, and very glad you got started with enough time to get it all worked out in advance!!

Termination requirements do really depend on the particular hardware involved.. We contacted the vendor of our LED wall washes, that use the O-ring sealed DMX connectors with rings that screw down to pull the seal tight, and asked them about obtaining a terminator that would work with those connectors. Their response was "Why? We have customers with far more than the 15 units you are using in a chain, and have never heard of any issues where termination was needed"

So, it does appear to depend on the DMX hardware you are using, as well as cable quality, length, and ambient RF interference sources. But, without a doubt, if you are having issues, try installing termination.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

×
×
  • Create New...