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  • Motor Speed

    I have 70's and just installed a new motor on the table and now it SCREAMS... Setting pins fine, just REALLY quick... obviously making it impossible to time with the sweep... any suggestions????? Both motors are 1725rpm

  • #2
    Re: Motor Speed

    There was two different speed gearboxes made on 70's. If the one you have on the table is faster, transfer it to the sweep and the machine should work fine. Hope this helps.....

    Steve [img]/content/btubb/images/%%GRAEMLIN_URL%%/cool.gif[/img]
    Prevent the problems. Don't do crash repairs.

    Drywall in a bowling center: Recipe for disaster.

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    • #3
      Re: Motor Speed

      Did you change just the stator, or the whole gearbox? If it's just the stator I can't see why it would run faster if the original one and the replacement are both 1725 RPM.
      Give me a hammer and some duct tape and I can fix it!

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      • #4
        Re: Motor Speed

        I have one of those too. Steve is right. It will work better on the sweep but mine is still on the table. It took some creative adjusting to keep it from interlocking. Basically, you have to make SC think it's at 270 before it actually is.

        Recently it started to interlock a couple of times a week. It turned out that the sweep gearbox was low on oil causing it to run just a little slower than normal. Since I refilled it, I haven't had an interlock in about a month.

        Dutch

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        • #5
          Re: Motor Speed

          14/1 gear ratio versus 12/1. Do as the other guys say and put the fast motor on the sweep or better yet replace the motor and use it only as an emergency spare to get you by. Imagine two of those puppies running on your machine. Talk about shake rattle and roll.

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          • #6
            Re: Motor Speed

            Quote:]Originally posted by mechanic8230:
            Imagine two of those puppies running on your machine. Talk about shake rattle and roll.[/QUOTE]

            Actually, kinda speaking from experience, it's more like clunk, chatter, and thud... [img]/content/btubb/images/%%GRAEMLIN_URL%%/laugh.gif[/img]
            <span style="font-style: italic">Educatio est omnium efficacissima forma rebellionis</span>

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            • #7
              Re: Motor Speed

              HEY I HAVE 36 LANES AND 36 OF THE FAST GEARBOXES.WE BOUGHT THESE OLD STEPPER 70'S LAST YEAR FROM SOME PLACE IN JERSEY. IF YOU PUT THEM IN THE SWEEP IT IS HARD TO CLEAR WOOD IF IT PILES IN THE GUTTER. THE SWEEP GOES SO FAST THAT IT RAMPS OVER THE PINS NOT MATTER HOW LOW YOU ADJUST THE SWEEP. PLUS YOU HAVE TO RETARD THE SWEEP RUN SO IT DOES NOT HIT THE 1 PIN . YOU CAN ALSO TRIM THE TB CAM A PINCH TO START SWEEP UP A LITTLE LATER.IF YOU PUT IT IN THE TABLE YOU HAVE TO TWEAK YOUR INTERLOCK. AND ON SOME MACHINES IT IS IMPOSSIBLE WITHOUT GRINDING THE INTERLOCK CAM.PLUS IF YOU TALBE ADJUSTMENTS ARE NOT PERFECT PINS WILL FALL.I AM IN THE PROCESS OF MATCHING FAST WITH FAST AND WEIGHTING THE SWEEPS ON EACH SIDE WITH 2LBS TO HELP KEEP THE SWEEP DOWN. AND I CANT ASK THE OWNER TO BUY THE GEARS TO CONVERT 36 MOTORS. I THINK YOU SHOULD BUY THE GEARS AND CONVERT IT TO A SLOW ONE. HOPE THIS HELPS YOU. GLEN. OH AND I HOPE THE CAPS DONT OFFEND ANYONE

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              • #8
                Re: Motor Speed

                Does anyone know if the motor is 50 or 60 cyles?The owner of a small house called to ask me about two motors that he bought that "seemed" to run very fast. The motor plates had been changed and sold "AS IS ".
                I installed a 16 lane center years ago when used machines were cheap. The were Jap machines with 50 cycle National motors. I had the owner pick up 16 motor heads and we put them in the table position. As time and money allowed, he replaced all the motors.
                &quot;Gun control is the policy of tyrants&quot;
                Rep. Rob Bishop (R-UT)

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                • #9
                  Re: Motor Speed

                  Quote:]Originally posted by amfpinboy:
                  I installed a 16 lane center years ago when used machines were cheap. The were Jap machines with 50 cycle National motors. I had the owner pick up 16 motor heads and we put them in the table position. As time and money allowed, he replaced all the motors.[/QUOTE]

                  I have 50 cycle motors currently running on the tables now... the machines we got when we bought out another center had them installed. They run good, and as long as they continue to do so, I'm going to leave them in place... As they burn out or die (usually about 1000 years or so for National motors), I'll get new 60 cycle ones.
                  <span style="font-style: italic">Educatio est omnium efficacissima forma rebellionis</span>

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                  • #10
                    Re: Motor Speed

                    I worked on the fast motors in Toledo in 1969. The final rpm is 14.5. Both sweep and tables were that speed so I had no problems with interlocks but spotting adjustments were critical.

                    Mike

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                    • #11
                      Re: Motor Speed

                      GMAN, You live with 50 cycle motors!! Bless you !! I serviced that 50 cycle center for a long time. Every Sat. I'de have to spend most of the day re-adjusting tables. Once he started replacing the table motors, everything was fine. I just started useing the new modular start relays from AMF. There are still some motors running with the points and cent. mech. on some of my machines.
                      &quot;Gun control is the policy of tyrants&quot;
                      Rep. Rob Bishop (R-UT)

                      Comment

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