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  1. #1
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    Default soft thermal alarm (OVC)

    We are getting a soft thermal alarm (436) on a FANUCservo system on a HWACHEON Lathe on the X axis. We swapped encoders and the problem didn't follow the encoder. The motor was checked by a tech shop and found OK. What will give the 436 alarm. Thanks in advance for any help.

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    Default About OVC

    Check energy of brake machanism..also check diode bridge...



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    hi
    i have a similar problem on our Doosan horizontal borers, Mainly the y axis motor gives off a soft thermal alarm, basically it is i believe an overtemperature alarm which when it occurs requires a power down and restart to sort out, this only happens when the said axis is not moving, ie its brakes are applied. you should be able to monitor the temp of the motor, maybe the cooling fan is not functioning properly or the brake is the problem.

    mick



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    *Registered User* nilbarkalepatil's Avatar
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    Dear Mick

    We also have the same problem in DOOSAN HMC its Z axis getting the problem of Soft thermal ovc. We did its scraping before it after this we are getting this problem. we done following steps we loosen its stepper plates also loosen its weights plates But the problem did not solved. if we looses the ball nut the alarm goes off but as we tightens the alarm is occurs

    if u have any solving steps for this please suggest.



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