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Thread: Working on tripod power distribution, now blinking power light on CEM60 mount?

  1. #1
    cmassa's Avatar
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    Default Working on tripod power distribution, now blinking power light on CEM60 mount?



    I'm working on improving my cable management so that set up will be faster (until I can build an observatory anyway). I bought a RigRunner and PowerPole connectors and have been making adapter cables this evening. This way, all of my cables are on the tripod and I won't have to spend 20 minutes assembling a rat's nest of power cables. I also got a new USB hub (StarTech) which will hopefully be more reliable than my previous very cheap hub.

    CEM60-power.jpg

    After making the cables and attaching everything, I checked to make sure polarity and voltage are correct. Voltage from the supply is 13.9v. I plugged everything in and turned things on and everything works nice.

    However, I then noticed that the power light on my CEM60 is blinking. The mount works fine and when slewing the power light goes solid. No error messages reported in the HC. I took the iOptron cig lighter adapter and tried that with the same power supply and the light stays solid all the time. Voltage coming throught the iOptron cig lighter adapter is the same as through the RigRunner.

    Any thoughts on why the power light is blinking?

    Chris
    OTA's: TPO 10" f/4 Newtonian, Celestron 8" EdgeHD SCT, 0.7x Edge reducer lens, Astro-Tech AT65EDQ, Astro-Tech 50mm guide scope
    Mounts: Software Bisque Paramount MX+, iOptron CEM60
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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    Hi Chris,
    I don't know exactly what is causing the blinking, but it could be that your power supply cannot deliver enough Amps.
    Did you check that your power supply capacity in Amps or watts is sufficient to cover the need of all your 'users' together

    Capacity of Power supply > the sum of all the users together.
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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    It blinks when it is the only thing plugged into the supply which can deliver 10 amps continuous. The CEM60 requires 1-2 amps. The power supply that comes with the mount is 2 amps.

    I have ruled out the RigRunner itself, bypassing it using the powerpole adapters causes the blinking. I tried a different cable, same blinking.

    Using the iOptron cig lighter adapter in the same power supply - no blinking.

    Chris
    OTA's: TPO 10" f/4 Newtonian, Celestron 8" EdgeHD SCT, 0.7x Edge reducer lens, Astro-Tech AT65EDQ, Astro-Tech 50mm guide scope
    Mounts: Software Bisque Paramount MX+, iOptron CEM60
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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    What is the voltage of the power supply? I know they are all nominally "12 volts", but the actual voltage may be anywhere from 13 to 15 volts, depending on what it was designed for.

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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    hmmm interesting...
    If the cig lighter adapter inserted in the same power supply (same connectors I presume) gives no blinking, then the problem should be after the power supply connector in the cable itself..

    Maybe the cable that causes the blinking has a different gauge and impedance of the iOptron one?
    In the blinking cable, Are the soldering of the connectors to the wire well done? no cold soldering?
    no filaments that touch the positive and negative?

    it sound like an head breaker this one.....
    Clear Skies, Marco
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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    13.95v, I measured it. The voltage is the same at the end of the cable.

    There is likely a lot less resistance using my 18g wires and PowerPole connectors than the stock cig lighter adapter.

    I did look through the manual and the blinking is not mentioned.

    Chris
    Last edited by cmassa; 12-06-2014 at 02:33 PM.
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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    Measure the output at the connector you plug into the mount. It sounds like maybe a cable problem. Double check polarity.

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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    I think you'll need to measure the voltage at the mount with the cables plugged in. This can be tricky, but you may be able to get at the back of the connector. Do this in both cases, and may give you a clue.
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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    Polarity is the same, I checked. If it wasn't I think the mount would fry. Voltage at either connector is the same (unplugged). I can't get at the terminals of the cig lighter adapter when it is plugged in but my power pole adapter is 13.93v when plugged in and the mount is on.

    Resistance of my cable is 2.5 ohms, 4 ohms for the cig lighter adapter.

    Chris
    OTA's: TPO 10" f/4 Newtonian, Celestron 8" EdgeHD SCT, 0.7x Edge reducer lens, Astro-Tech AT65EDQ, Astro-Tech 50mm guide scope
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    Default Re: Working on tripod power distribution, now blinking power light on CEM60 mount?

    I got my answer from iOptron. The blinking reports out of range voltage. Fast blinking is >14v. Slow blinking is <10v. Mine must be right at the border which is why when slewing, the light goes solid. The cig lighter adapter must have enough resistance to bring the voltage down just enough to stay under the limit.

    I'll wire up a step down adapter for the system.

    Chris
    OTA's: TPO 10" f/4 Newtonian, Celestron 8" EdgeHD SCT, 0.7x Edge reducer lens, Astro-Tech AT65EDQ, Astro-Tech 50mm guide scope
    Mounts: Software Bisque Paramount MX+, iOptron CEM60
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  11. The Following 3 Users Say Thank You to cmassa For This Useful Post:

    bjswx (11-27-2018),KathyNS (12-06-2014),MCox (12-07-2014)

 

 
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