Need Help! SL20 Chip Auger Cycling with NO LOAD


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Thread: SL20 Chip Auger Cycling with NO LOAD

  1. #1
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    Default SL20 Chip Auger Cycling with NO LOAD

    03/00 Production
    MOCON 10.2

    A few days ago I noticed my chip auger was cycling forward and back like the overcurrent protection circuit was kicking in.

    I cleared the chip pan (there were no large chips or parts binding it up), and turned on the auger again. It ran forward for 3 seconds, stopped, and reversed.

    I disconnected the auger so that the only thing the motor had to turn was the gearbox, same cycling issue,

    I disconnected the motor from the I/O board, and hit Chip FWD, the LED lit up and it ran in the forward direction without cycling.

    I pulled the motor and contacted the manufacturer, they sent me a spec sheet and the motor checked out fine, except that the capacitor was out of spec.

    I replaced the cap, and tried running the motor again, and again it cycles back and forth with no load.

    I found some info sheets on replacing the I/O board, and noticed there's a potentiometer adjustment for the overcurrent protection. I was wondering if it might be set on the low side, and if I could tweak it a little. I couldn't' find the specs for my specific board, and several board sheets have a very wide range of settings (from 500ohms to 4,500 ohms).

    I checked the resistance on my board between TP6 and TP7 at R119 and R122, and it measured 3.7K ohms.

    The tag on my I/O Board reads:

    SM01003002
    3080S REV D

    Does anyone have a spec sheet for this board? I'd like to have something on paper before I start turning potentiometers.

    Also, if anyone has any other ideas which may cause this issue, please reply.

    Thanks,

    -John

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  2. #2
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    Default Re: SL20 Chip Auger Cycling with NO LOAD

    Measure your resistance between tp6 and tp7. Adjust the overcurrent to 3k ohms +/- 100 ohms for augers and conveyors.
    Adjust the overcurrent to 4.5k ohms +/- 100 ohms for lathe chip conveyors.


    You could have a faulty motor, wiring between the I/O and motor could be bad, and of course the I/O could be bad. If it's a conveyor the belt could be damaged and bound up underneath. Hope this helps



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SL20 Chip Auger Cycling with NO LOAD

SL20 Chip Auger Cycling with NO LOAD