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Thread: Johnford SL-800B False overtravel

  1. #1
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    Default Johnford SL-800B False overtravel

    Hi all,
    this machine has began to have a problem with the hydraulics turning off during cycle. The only thing I see on the panel is the over travel indicator is lit while both turrets are actually in cut. No alarms are present. At times we can dial the turrets around a bit after cycling power and get it to machine 3 or 4 parts before the same thing happens again. At one time we did get a motor over load alarm.
    Any help would be appreciated.

    Thanks, Bob

  2. #2
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    Default Re: Johnford SL-800B False overtravel

    Bob,
    Usually when there is a problem with the machine the hydraulics often turn off. I would check the drives for alarms on them when it stops. If there is something displayed that will help determine what the issue is. The other thing is does it generally happen at the same location each time or very close. This could indicate something happening around that position or vibration during a cut etc. If it is an overtravel usually it would say what axis.

  3. #3
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    Default Re: Johnford SL-800B False overtravel

    Thanks Petro
    tech was in and found a bad cable and switch on lower turret home position. Parts ordered.

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