Need Help! Fanuc 3M Memory Expansion


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Thread: Fanuc 3M Memory Expansion

  1. #1

    Default Fanuc 3M Memory Expansion

    So we have come to the conclusion that we cannot drip-feed to our Fanuc 3M control without a set of expensive chips from Nexus. I am writing here as a last attempt to try and save us some cash. Is there any cheaper method to solve the issue of limited control memory? Maybe someone has a memory module/board that they want to part with? Does such a thing even exist for the 3M? I talked with some experts and they led be to be curious about these blue expansion slots on the motherboard (see image). Any and all advice is greatly appreciated!

    IMAGE: https://flic.kr/p/2mMZZuB

    -Justin

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  2. #2
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    Default Re: Fanuc 3M Memory Expansion

    The base memory for the '3' control was 20m, with an additional 20m enabled by option parameter. A 40m memory card was available for a maximum 80m total.
    Given the limited market for this control, Tulip Electronics did not develop any expansion for this control. Nexas (not Nexus) developed the set of eproms that overcame the memory limitation.



  3. #3

    Default Re: Fanuc 3M Memory Expansion

    40m? Meaning megabytes? Or 40 meters of punched tape? I estimated this machine to only have 16K. We could do a lot more with 40MB or an extra 40m but our machine only accepts about 10K before we run out of space. Do you know what parameter controls that second 20m?

    Thanks,
    Justin



  4. #4

    Default Re: Fanuc 3M Memory Expansion

    Would something like this work with the 3M?
    LINK: https://www.ebay.com/itm/18218997817...evt=1&mkcid=28



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    Default Re: Fanuc 3M Memory Expansion

    lower case m = meter or milli; upper case M = Mega. So yes, we are using meters. 10m ~ 4 kB.
    Send me a pm to get the parameter.



  6. #6
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    Default Re: Fanuc 3M Memory Expansion

    No; that's a ROM board.



  7. #7

    Default Re: Fanuc 3M Memory Expansion

    Fanuc said we could get another 20m with this board: https://www.ebay.com/itm/28267547218...evt=1&mkcid=28



  8. #8
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    Default Re: Fanuc 3M Memory Expansion

    Replied to your pm.



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