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Thread: Hitachi Seiki HT-25G Lathe Turret Alarm 5105

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    Default Hitachi Seiki HT-25G Lathe Turret Alarm 5105

    This is my first CNC lathe, so apologies in advance for any poorly worded questions. Machine is 1993 HT-25G with Seicos L Multi Conversational control.

    Alarm Reads: 5105 - Power Off During Turret Index - See Operation Manual 6-1 ///

    The turret appears to be sitting on Station 1. When I hit the turret index button I hear a pump or motor kick on but the turret does not budge. Once I try to index it the the standby light goes out and the axes & spindle will no longer jog, the machine appears stuck and the condition will not reset with the sheet key. If I turn the machine off then on again I can jog everything as before. I tried the 3-button correction procedure in Section 6 page 6-59 recommended several places but it is confusing. There are 3 different 'Select' keys and I am not sure how to select a feed mode per instructions. I tried every 'select' button combination but nada. Turret won't index within this process, it just sits on station one, which is where it belongs?

    I should try this again with 'a feed mode' selected but I am not sure how to do that.

    TIA
    Bill

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    Default Re: Hitachi Seiki HT-25G Lathe Turret Alarm 5105

    Hello Bill, happened to me also.

    Culprit was dry oil line going down to the main turret shaft.

    Pulled out turret, from the dry spots on the main spindle and housing. Polished spindle and shaft, replaced value regulator in the bank of valves under turret cover.

    Reinstalled turret and reset encoder.

    one day to get it out, another to get it back in.

    Hope it helps.
    Steve

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    Default Re: Hitachi Seiki HT-25G Lathe Turret Alarm 5105

    Hi Steve,

    If I pull the lube line and there is oil in it can I eliminate this as the culprit?

    One of your people contacted me via email mentioning you had the turret drive rebuilt/repaired for $2800. Do you know who the boards were sent to for repair?

    Thanks,

    Bill

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