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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > Fanuc 16-M -> won't feed when spindle is keylocked
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  1. #1
    Join Date
    Feb 2011
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    Fanuc 16-M -> won't feed when spindle is keylocked

    We have a horizontal machining center with a Fanuc Series 16-M control. We need to back-chamfer (plunge) a hole, so we keylock the spindle, position in X & Y so we can feed through the hole, we feed in the Z-axis through the hole to get to the back, then we want to feed to the centerline in the Y-axis, start the spindle, feed in the Z-axis to desired depth, then reverse the process to get out of the hole.

    The machine feeds no problem in the Z-axis with the spindle keylocked, but won't move in the X or Y-axis. Is there a parameter I need to change? Or is there another way to get through this? I'm stuck and the machine is down any help is very much appreciated...

    Thanks

  2. #2
    Join Date
    Mar 2003
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    2932
    Have you tried the G87 Back Boring Cycle?

  3. #3
    Join Date
    Feb 2011
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    No I haven't tried the G87 cycle although that is probably a good idea.

    What I did was change it to rapid (G0) instead of feed (G1) and it worked.

  4. #4
    Join Date
    Mar 2003
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    2932
    Quote Originally Posted by pwilson101 View Post
    No I haven't tried the G87 cycle although that is probably a good idea.

    What I did was change it to rapid (G0) instead of feed (G1) and it worked.
    You didn't specify the machine make, but I know on some Doosan's/Daewoo's they have an M-code to allow it to feed with the spindle stopped. Maybe this is the case with your machine?

  5. #5
    Join Date
    Feb 2009
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    6028
    Might try with a M19 as well.

  6. #6
    Join Date
    Feb 2011
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    It is a Daewoo...so there may be an M-code for feeding with no spindle? I have no M-code list for this machine, does anyone know what I can try?

    And I tried it with the M19 and it didn't work.

  7. #7
    Join Date
    Mar 2003
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    2932
    Quote Originally Posted by pwilson101 View Post
    It is a Daewoo...so there may be an M-code for feeding with no spindle? I have no M-code list for this machine, does anyone know what I can try?

    And I tried it with the M19 and it didn't work.
    What is the Model and serial number?

  8. #8
    Join Date
    Mar 2003
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    2932
    You might try M84. That's the code for a DHC400, anyway.

  9. #9
    Join Date
    Mar 2007
    Posts
    122
    Some machines have a keep relay for monitoring M3/M4 basically to check if the spindle is running during a feed (G01). Do you have a list of keep relays?

  10. #10
    I just ran across this very same problem. What I found to fix this is parameter 3708 bit 0. Turn off bit 0 (xxxxxxx0)

  11. #11
    Join Date
    Sep 2008
    Posts
    28
    M84 will let you feed when spindle is stoped !
    M85,M30 or 'Reset' cancels it

  12. #12
    Join Date
    Mar 2003
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    2932
    Quote Originally Posted by drdos View Post
    I just ran across this very same problem. What I found to fix this is parameter 3708 bit 0. Turn off bit 0 (xxxxxxx0)
    Is your machine a Daewoo or Doosan?

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