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  1. Replies
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    Yes, very odd for a cable and board to fail at...

    Yes, very odd for a cable and board to fail at the same time. One thing to keep in mind is that the cables are made by the machine builder or a sub-contractor in 99.99% of all Fanuc equipped...
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    This webpage gives you contact info. CNC...

    This webpage gives you contact info.

    CNC Systems Telephone Support | Mitsubishi Electric Americas

    Been a while (7 or so years) since I have contacted them, so do not know if they have changed...
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    I very much doubt that there is a parameter...

    I very much doubt that there is a parameter issue. I think your best bet will be to call Mitsu on Monday. IIRC, OKK has done some custom U/I stuff with the control. Since it works in some modes...
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    To be more fair would be to compare with the 0TT...

    To be more fair would be to compare with the 0TT which was a dual path control. Some builders in a cost cutting move used the single path 0T-C on multi-axis lathes. Was a horrible idea. Some...
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    You have to keep in mind that there is about 7...

    You have to keep in mind that there is about 7 years difference in the origins of those two controls. An eternity in the world of computers in the 80s. The Fanuc 6 did not even have a CRT as...
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    Mits are good controls. They often come with...

    Mits are good controls. They often come with features as standard that Fanuc has as optional. Bigger memory, more offsets, multi-pitch helical interp., user modifiable ladder, etc. They are also...
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    The modern take ^ on how to convert old PCM...

    The modern take ^ on how to convert old PCM drawings to CNC programs. Sure beats my old method of laying the PCM over graph paper and plotting points, estimating radii, and arc centers from that.
  8. I think you are missing the I/O link terminator...

    I think you are missing the I/O link terminator plug on connector JD2 in this picture. I don't have access to a machine with the same control to check, but IIRC, there is supposed to be a...
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    AFAIK, anyone can attend. They do have class...

    AFAIK, anyone can attend. They do have class fees. Here are links to the current offerings...

    CNC Training Course Descriptions | FANUC America
    ...
  10. Replies
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    Part of material given at a Fanuc training course...

    Part of material given at a Fanuc training course ~30 years ago. Not special nor secret. Maintenance training classes were/are available from Fanuc to users.
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    I think that every DC spindle motor I have seen...

    I think that every DC spindle motor I have seen has been a separately excited type. Machine builders used that type to get a wider speed adjustability range than can be obtained by a series wound...
  12. The Yaskawa drive has its own internal low...

    The Yaskawa drive has its own internal low voltage power supply. If it is failing you will not get any alarm on the drive itself because there is no low voltage to drive the alarm display. A device...
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    From looking at the pic he posted I'm thinking...

    From looking at the pic he posted I'm thinking these are bar fed parts hence the 4m length.
  14. Yes, orientation and locking are two very...

    Yes, orientation and locking are two very separate functions. Locking via a shot pin or brake mechanism is pretty rare on a machine new enough to have an MX1 control let alone an MX3.
    ...
  15. M19 will orient the spindle for the toolchange...

    M19 will orient the spindle for the toolchange process. For any other positions, that functionality would be the responsibility of the machine builder, not Yaskawa.
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    That's an AC drive. Not compatible with the OP's...

    That's an AC drive. Not compatible with the OP's machine.
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    Do the outputs that activate the light and...

    Do the outputs that activate the light and coolant originate in the same I/O board or module? If so, I'd start looking there to see if the outputs are going low when the trouble occurs.
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    Alarm 416 is the disconnection alarm. Basically...

    Alarm 416 is the disconnection alarm. Basically means that despite sending a move command to the servo drive the control is not seeing appropriate encoder signals in return. Bad cable, bad encoder...
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    Yeah, sometimes for consumer use parts one has to...

    Yeah, sometimes for consumer use parts one has to do toolpaths that are aesthetic rather than efficient.
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    Then the M code speed changes must be switching...

    Then the M code speed changes must be switching the field windings from a 2 pole (high speed) configuration to a 4 pole (low speed) configuration. I have never worked on a motor set up like that.
    ...
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    That sounds like shifting ranges in a 2 speed...

    That sounds like shifting ranges in a 2 speed gearbox to me. If it is, then changing to an AC setup would not change it.
  22. That is machine builder determined. I don`t...

    That is machine builder determined. I don`t recall the machine builder, but one old one that I worked on had the chamfer on/off on a toggle switch on the operator panel.
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    It is possible, but a fair bit of work. IIRC,...

    It is possible, but a fair bit of work. IIRC, that machine should have DC servos. You have to swap motor power cables and A and B phases on the encoder. That will make the motor reversed. Then the...
  24. Might be able to command T0. It would depend on...

    Might be able to command T0. It would depend on how the machine builder wrote the ladder program. G53 might also be available. Not sure if that was available on a L0 control, but it was on a L50....
  25. Well, control related anyway. Don't know how the...

    Well, control related anyway. Don't know how the Okuma/Hardinge relationship is. I'd want to be sure to understand what support from Okuma might look like for future control related issues.

    Shop...
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