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  1. There is some basic errors in your thinking. 1....

    There is some basic errors in your thinking.
    1. There should be an odd number of bars on the commutator, so there is no opposite bar at 180°.
    2. There is usually an odd number of slots for the...
  2. The bigger issue is the transformer Wye or Delta...

    The bigger issue is the transformer Wye or Delta on both the Primary and or Secondary.
    A Wye connected transformer (primary or secondary) moves manufactured leg instability to all 3 phases.
    So it...
  3. Check the N/C contact on the AP relay, it must be...

    Check the N/C contact on the AP relay, it must be closed and making contact with the spindle is not running.
    The AP relay contact will be bypassed when you manually operate the F or R relay.
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    Well we are half way there with 6 more days to...

    Well we are half way there with 6 more days to go!!
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    The taper in the T/S of both my EE's was worn at...

    The taper in the T/S of both my EE's was worn at the ends. The center 1"+ was unworn.
    The center I was using only seated on that 1"+ area, and squirmed around with any side movement.
    This resulted...
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    So based on the problem you are having, I suspect...

    So based on the problem you are having, I suspect that the PO had employees running the lathe
    and occasionally when increasing speed with the spindle running, there would be a field loss and the...
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    WOW, the OP asks a question, My advice on post...

    WOW, the OP asks a question,
    My advice on post #13
    He responds with he has these coils already in #14
    I asked what resistance are they in #16
    The OP answered in #18
    rakort figured out a proper...
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    What you have found, will result in a field loss,...

    What you have found, will result in a field loss, when starting with no field, will overload the MG.
    Operating the FA relay, will bypass the motor field rheostat, providing full field to the motor....
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    I was thinking more along the lines of these. ...

    I was thinking more along the lines of these.

    2PCS OHMITE 0207 270-25K-40 RESISTOR 2K OHMS 25W P3620 | eBay

    Bill
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    I would start with the Mazak parts book. Most of...

    I would start with the Mazak parts book.
    Most of the time the size is listed there.
    I use Metric Seals @ 317-896-3555,
    Bill
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    So what is the resistance of these coils?

    So what is the resistance of these coils?
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    Winding a replacement coil is not rocket science...

    Winding a replacement coil is not rocket science here.
    So is making a replacement for the inline exciter when that is needed.
    I started a thread covering my replacement, because I couldn't get a...
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    The spindle amp should be a FR-SF. The module...

    The spindle amp should be a FR-SF.
    The module at the top is the power supply.
    When working, there should be an LED that is visible inside.
    If it is off when not working, insure that you have all...
  14. I have several posts on this thread, tooling and...

    I have several posts on this thread, tooling and parts made.

    Hardinge Turning Tools For Turret - Needing Some Help!

    and more stuff here:

    Just bought a Hardinge ESM-59 lathe; questions about...
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    So check out his negative feedback, his replies...

    So check out his negative feedback, his replies tell it all.
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    Does this CNC have an internal transformer...

    Does this CNC have an internal transformer connected for 460 Volts?
  17. I have the FR-SF service manual BNP-A 0801-19-D-E...

    I have the FR-SF service manual BNP-A 0801-19-D-E

    File size is over 15 MB.

    The T2 control is not bus linked to the drive, so all the drive parameters are set on the drive.
    #33 is for accel....
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    Most of the heads like this I have worked on are...

    Most of the heads like this I have worked on are NMTB-30 spindle taper.
    They do not use a draw bar like the R-8, but have a nut on the spindle mouth to hold the tools in.

    Bill
  19. The nameplate on the door of the electrical panel...

    The nameplate on the door of the electrical panel lists the schematic part number.
    The stuff I have posted is from a CHB-8220 drawing, normally the only thing that changes is the version letter a...
  20. Check the 3 phase power to the bottom of the...

    Check the 3 phase power to the bottom of the FR-SF. Phase to phase and phase to ground, 6 checks.
    Line voltage may be a little high.

    When does it fault out above 1000 RPM?
    Picking up speed?...
  21. First the spindle rotation must be correct. I...

    First the spindle rotation must be correct.

    I started this thread to help others troubleshoot the HC speed controls.


    Hardinge HC spindle variable speed won't change speed troubleshooting info...
  22. Try running the spindle at 10 RPM. Does it turn...

    Try running the spindle at 10 RPM.
    Does it turn smoothly, or pause (may even turn backward) then jump a little?
    You may need to look at the motor pulley to see that the jump happens at the same...
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    Get the drive checked out first. with part of a...

    Get the drive checked out first. with part of a sine wave missing, the motor has no torque to hold position.
    So this problem may go away when the first problem is fixed.

    Bill
  24. Posting an accurate wording of the alarm is a...

    Posting an accurate wording of the alarm is a good place to start.
    "Something" in the wording will keep most people away.
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    If the spindle drive is a FR-SE or a FR-SF there...

    If the spindle drive is a FR-SE or a FR-SF there is a power supply at the top of the drive that has lots of outputs.
    There is probably 1 or more outputs that are not working.
    This leaves parts of...
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