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spot solenoid engaging with table relay.


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  • spot solenoid engaging with table relay.

    Yesterday a wire burned off the back end relay, cut it off past the crispy part, crimped a new female spade on it stuck it back on, noticed the jumper wire in the back didn't have ANY insulation on it. pulled and replaced. Turn machine on backend works great. engage the table relay and the only thing that happens is the spot solenoid engages. the table doesn't go anywhere, no hum no spark in the motor, nothing. I looked at 36Y and 35U on the C1, both sides didn't look bad. changed out the spot relay in the chassis.

    so what's next?
    I'll meter the combo plug and see if I'm' getting any power there but how much is it supposed to get?
    When you know what to do, everything is easy.

  • #2
    Simple things come to mind? Is the table motor klixon tripped, is it limited to just that chassis? Possibly a loose connection on the table relay. Have you tried running the table from the sweep plug and vice versa?
    Also check pins 31 through 34 on the C1 block as that's where the power for the table goes through. Many times in chassis I'll see wires jumped from one relay to another to help in supplying power so the load is split up among different spots so one wire isn't getting hot to supply power to the motor. Was there or is there a wire that went from your back end relay to your table relay that might've gotten fried or might still be fried. Pin 47 on the C1 block supplies power to the back end motor as well supplying power to the entire machine, because it connects to TS-18 in the wireway, also this is where the hot side of the Russell & Stolle plug enters the machine thru TS-18. My current center I've had a good share of electrical issues already and most seem to stem to that top row of pins on that plug.
    35 is the respot solenoid (if you have double solenoid machines) and 36 is the spot solenoid. So if the spot solenoid is engaging every time the table relay is pulled in i'd have to imagine 35 & 36 are crossed somehow as the spot solenoid should only pull in if called for a spotting cycle, unless the spot relay is bad. You said you changed it, but I wasn't clear if that solved that part of your problem.


    • #3
      The klixon was not tripped. the caps from another working lane did not help. I fell for the old C1 looks good trick.
      put a known good chassis on and had no cycle function but i could run the sweep from the relay and mechanic's control box. the table did run from the relay in the chassis this time.

      Ended up that there was a couple crispy sockets pushing in on the machine side and the original chassis needed a whole new C1 except for the expander wires. The 35 and 36 had cooked the inside of the plug and were making contact on the top row. just never seen one screw up like that without smoking or visual melting on the outside.
      When you know what to do, everything is easy.


      • #4
        Grit, most people are against this but I run my backend motor wire over the top with a wire nut. It keeps the FIRE out of the plug. Most use two wires in the plug but it can still get everything crispy.


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