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IndustryArena Forum > MetalWorking Machines > Daewoo/Doosan > 2005 Daewoo Puma 240L Spindle-1 Temp at 83’C
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  1. #1

    2005 Daewoo Puma 240L Spindle-1 Temp at 83’C

    What is the maximum temperature for the spindle bearing before the machine stops? Will the machine stop itself?

    We’ve had some alarming noise from the machine and haven’t been able to determine exact source.
    It’s time and temperature related but... intermittent.

  2. #2
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    Re: 2005 Daewoo Puma 240L Spindle-1 Temp at 83’C

    At 72 Celsius the kluber will start to break down.
    But thermal expansion on damaged bearings causes more damage, causes more heat, causes more expansion, causes more damage...

    The sensors in an integrated motor, monitor the potential overheat of the stator, not the bearings.


    If the machine is equipped with bearing probes they will note that it is hot, but not guaranteed to stop before a catastrophic issue.
    Doosan Service Technician
    darryl.hardt@doosanmt.com O:973-618-2461 M:973-803-9479

  3. #3
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    Re: 2005 Daewoo Puma 240L Spindle-1 Temp at 83’C

    Recommendation is to
    contact your local dealer for a spindle vibration analysis.
    Bearing noise.
    Belt noise.
    Spindle Balance noise.
    Motor balance noise.

    Analysis would determine which.
    Each is resolved differently.
    Doosan Service Technician
    darryl.hardt@doosanmt.com O:973-618-2461 M:973-803-9479

  4. #4
    Should we continue to run?
    The rear Spindle Bearing peace is rated at 4200rpm.
    Our current program runs it to 4100rpm.
    We removed the service panels, turned off the heat and opened the doors.
    With a shop blower fan applied and cooling externally, the temp doesn’t go above 83 Celsius.
    The attached photo is of the rear Spindle Bearing Assembly (I don’t know the actual terms for that section of the spindle.)
    Is this the area from which the high temperatures are being indicated from within diagnostics 403 line?
    I just need to know... if we continue to run until failure occurs, or have we potentially put the problem source in the crosshairs?
    Attached Thumbnails Attached Thumbnails 9BDC4D25-93BC-46CD-9C60-8D2E178F8E30.jpg  

  5. #5
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    Quote Originally Posted by Kelsang-Lungta View Post
    Should we continue to run?
    The rear Spindle Bearing peace is rated at 4200rpm.
    Our current program runs it to 4100rpm.
    We removed the service panels, turned off the heat and opened the doors.
    With a shop blower fan applied and cooling externally, the temp doesn’t go above 83 Celsius.
    The attached photo is of the rear Spindle Bearing Assembly (I don’t know the actual terms for that section of the spindle.)
    Is this the area from which the high temperatures are being indicated from within diagnostics 403 line?
    I just need to know... if we continue to run until failure occurs, or have we potentially put the problem source in the crosshairs?
    As you have no idea what you are doing...
    The attached image is the actuator, not the spindle bearing...

    I would strongly recommend that you STOP.

    ...and contact your local dealer for a spindle vibration analysis.
    You are not capable of understanding two entirely different parts...
    Bearing noise.
    Belt noise.
    Spindle Balance noise.
    Motor balance noise.

    Analysis would determine which.
    Each is resolved differently.

    Or kill the machine and call the dealer for a very expensive and time consuming repair.
    Doosan Service Technician
    darryl.hardt@doosanmt.com O:973-618-2461 M:973-803-9479

  6. #6
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    Quote Originally Posted by Kelsang-Lungta View Post
    Should we continue to run?
    The rear Spindle Bearing peace is rated at 4200rpm.
    Our current program runs it to 4100rpm.
    We removed the service panels, turned off the heat and opened the doors.
    With a shop blower fan applied and cooling externally, the temp doesn’t go above 83 Celsius.
    The attached photo is of the rear Spindle Bearing Assembly (I don’t know the actual terms for that section of the spindle.)
    Is this the area from which the high temperatures are being indicated from within diagnostics 403 line?
    I just need to know... if we continue to run until failure occurs, or have we potentially put the problem source in the crosshairs?
    Last note: if the outside of spindle temp is 83c with fans on it...the internal grease is cooked and destroyed.
    Doosan Service Technician
    darryl.hardt@doosanmt.com O:973-618-2461 M:973-803-9479

  7. #7
    Huh?

    But my manager and first shift supervisor said to run it.
    The first shift supervisor, was kind enough to bring over the shop blower and remove the panels because it was hot.
    I was told we recently had a technician look at the machine on Monday the 28th, and he couldn’t find anything wrong.

    My instinct told me I better ask the CNC Zone.
    I knew there was something wrong.
    Thank You for your help and advice.

    You might have saved my life ????

  8. #8

    Re: 2005 Daewoo Puma 240L Spindle-1 Temp at 83’C

    Dhardt: What is the source of the 403 line temperature within diagnostics?
    The actual source name and location of the temperature probe for this 403 line of information.

    Attached is a photo of our Spindle Motor.
    Photo was taken in March of 2020.
    Note: April of 2020 we had a dealer technician arrive and service the machine.
    Late December 2020, less than two weeks ago, we had a dealer technician arrive and look at our Daewoo. He couldn’t find anything wrong.
    The noise would not recreate itself.
    I wasn’t there during this service.
    I don’t know if the machine was observed at different rpms and temperature and vibration monitored.
    We were basically given a thumbs up.
    So we ran the machine.
    Due to previous noise issues, I began monitoring the machine and it’s temperature more closely.
    This resulted in the recent line of questions.

    Can you tell me the location of the temperature derived from line 403.
    Can you tell me what temperature the machine will stop.
    In March of 2020, the machine would stop at 72C.
    Something has changed and I don’t know how or what changed it.
    Last note: During operation... with the spindle speed and load % displayed in the operator interface. I see S4100 and L149% constant.
    At what load % might I see a alarm? Would it shutdown the machine?

  9. #9
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    Re: 2005 Daewoo Puma 240L Spindle-1 Temp at 83’C

    403 is the Fanuc tempature of the Spindle Motor, not the spindle. Here is what the manual says about that diagnostic parameter. The Alpha i
    spindle motors overheat at 105°C (over 221°F). The spinlde load should never run above 100% for any lenth of time. Ramp up and ramp down you expect to see something but running normally you need to be below 100%

  10. #10

    Re: 2005 Daewoo Puma 240L Spindle-1 Temp at 83’C

    My email is eorlowe@dynasplint.com

    I would like to email you a photo of the spindle motor to determine if it is indeed the A1 you referred to.
    Also a video of the Spindle Speed and Load %

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