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  1. #1
    mjk
    mjk is offline Stainless
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    Default Fanuc Encoder Repairs

    I have a Fanuc A860-0320-T113-3000P ABS Pulse coder from the Y axis of my 1994 TNC vmc

    from one repair shop I've rec'vd an evaluation:

    "Glass and mask have been rubbed and are bad"
    non repairable

    I'm having the encoder sent back to me.
    Is this a a problem that can be fixed by a shop with differant skills, or do I need to find a a new encoder?

    Mike

  2. #2
    Dualkit is offline Diamond
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    I have had them apart before and it sounds like that diagnosis is correct, there is a thin glass disc inside with various timing marks or whatever you want to call them etched in. Any other markings on the glass will make the encoder read incorrectly. Shop around, pricing on those things are all over the place.

  3. #3
    mjk
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    Default

    October delivery from Fanuc
    If the glass disc is not broken, can they be repaired?
    Mike

  4. #4
    Bruce Griffing is offline Stainless
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    Default

    The key part of the encoder is the disk and its markings. If that is truly shot, then all of the value of what remains is minimal. Google your part number and you will find options.

  5. #5
    Dualkit is offline Diamond
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    Try Tennessee Industrial Electronics, they sell remanufactured units (615) 471-5070.

  6. #6
    mjk
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    TIE didn't have the encoder by itself

    I've been in touch with all the Google and Bing hits today in the USA, and attempted to read languages from countries I didn't know existed in other parts of the world

  7. #7
    mjk
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    I need to vent to someone who may understand my immediate pain

    This morning I received my encoder back from the repair shop. Although I've been told a glass rub is a kiss of death I did have a conversation with 2 repair shops that said it is remotely possible to repair.
    Wasn't I surprissed when a differant encoder was returned to me!
    The day can only get better?

    Mike going to take my first Excedrin of the morning

  8. #8
    Dualkit is offline Diamond
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    Can you somehow get a hold of a Fanuc know it all that can tell you what other encoders may work by just altering a few parameters? I am guessing there may be a sub, maybe not. Try calling CNC Electronics in Virginia (434) 971-1394, they do Fanuc board repair, they might know another source for encoders.

  9. #9
    mjk
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    CNC Electronics was my 2pm call yesterday

    My encoder is on its way back, appears to be an honest mistake

  10. #10
    Dualkit is offline Diamond
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    Sorry man, TIE and CNC Electronics are the only ones I have used for like parts. The good news is you have isolated the trouble. Keep watching E-bay maybe one will eventually turn up. You might have to farm some stuff out till you get the machine repaired. I was in the same boat, had two machines down after my move for months. I was upfront with the customers and let them go elsewhere, fortunately they received poor quality parts and I got them back.

  11. #11
    mjk
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    yeah, just have 1 vmc, just about to start 1st production run of a a new product line
    waiting for a quote back fitting my style motor with an ABS3000 encoder


    Fanuc just told me no stock avaialable for my a new motor

    And I thought classic cars was an expensive stressfull endevor

  12. #12
    Pipes is online now Cast Iron
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    Have you searched for a used motor with encoder? Sometimes the entire motor is more readily available as many who scrap out machines do not disassemble beyond major sub assemblies.

    Of course there is the risk that the encoder is bad in the used motor but you can wiegh the risk verses your immediate need to get running.

    Also check with these guys Servo Motor Repair - Servo Repair Experts | Servotech USA as they repair a lot of encoders and may be sitting on a replacement.

  13. #13
    John_B is offline Cast Iron
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    I've got one I took off a motor I bought that I needed a 2500p encoder on. PM me if interested.

  14. #14
    mjk
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    Update 8/2
    machine is back up running
    Servotech Incorporated in CT put together a refurbished motor with a differant style 3000 pulse encoder
    I gave a verbal goahead last Friday to put it together, shipped my core out Monday
    They shipped the replacement Wednesday, arrived this morning
    Not sure if every motor shop does this on repairs, but the motor has been repainted and a new Fanuc style decal applied, a little attn to detail, hopefully a hint as to their other skills
    1 year warranty, pricing was more than I could afford but more than fair considering the turnaround time

    Mike

  15. #15
    Dualkit is offline Diamond
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    What did you pay, I would think that set-up would run $2500 at a minimum? You didn't have to alter any parameters? Glad it is running.

  16. #16
    mjk
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    No parameter change as the encoder pulse qty was the same
    had to move the axis home trip dog 1/16"

    1 hour after receipt of motor machine was back running
    still have to replace sheet metal, but I've been running a startup program to cycle machine, along with shutting down and starting up. No issues

    this weekend to do 3 weeks work................

  17. #17
    mjk
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    pics of refurbished motor
    Attached Thumbnails Attached Thumbnails img_1163.jpg   img_1164.jpg  

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