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Thread: Tap retract

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  1. #1
    Join Date
    Jun 2006
    Posts
    247

    Tap retract

    is there a way to increase the retract rate in a tapping cycle?
    on the Haas I used to run there was a parameter for this, the value entered was a multiplier, so If 2 was entered, the retract speed would be twice as fast

    thanks for any help,
    Kenny

  2. #2
    Join Date
    Dec 2008
    Posts
    3110
    Depends on which control your machine has
    Which is ?????

    I know the OSP E100 has fast retract, maybe the E10 as well, P200-- yes,
    the 7000s and earier would not have it

    Best to check with Okuma for final comfirmation. or your Data Card in the back of the machine
    then if you have, then you can work out what parameters need setting to enable the function

  3. #3
    Join Date
    Mar 2009
    Posts
    1982
    Don't remember details. I'm sure, we use taping with fast retract on exhibitions. OSP U100M. I didn't knew, that could be problem with retract speed.
    Check what taping cycle You use.

  4. #4
    Join Date
    Jun 2006
    Posts
    247
    sorry, its osp u700m and osp u100m machines
    and we use G284 cycle for tapping with a solid holder

  5. #5
    Join Date
    Dec 2008
    Posts
    3110
    U700M .... you sure ??? not a 700M or 7000M .... the last 2 ... pretty sure they do NOT have fast return tapping

    OSP U100M .... yes, it does have fast un-threading, it has to be enabled in the parameters , no change to the program at all, I think you can also have sync. tapping happening on G84 as well.

    Not at work, so I can't look up the numbers for you, sorry.......someone else ???

  6. #6
    Join Date
    Jun 2006
    Posts
    247
    OK I probably got the U700M wrong
    I'm at home with the U100M book next to me and I thought the other machine model read the same way
    It must be a 700M, I know its not a 7000M

    Thanks for setting me straight

    The book I have for the U100M is the programming manual and it doesn't cover the parameters but I'll have access to all the books monday at work.

    I appreciate the help - now I know where to look.
    Kenny

  7. #7
    Join Date
    Dec 2008
    Posts
    3110
    Instead of using the book, why not use the disk, it has all the books in PDF form

    Hard to remember, but I copied the section that has a "START.PDF" or similar to a folder on the PC hard drive, deleted the japanese stuff, sent a shortcut link to desktop from the START.PDF file and bingo you're away.

    No, it not in the programming manual, maybe special functions #1 or #2

    PS just gone to 2010 here, so happy new year

  8. #8
    Join Date
    Jun 2006
    Posts
    247
    Thanks Supe,
    I'll inquire about the disk monday
    happy 2010 down under

  9. #9
    Join Date
    Jun 2006
    Posts
    247
    I found the parameter, but it didnt work
    I set it to 200% but there was no difference in the cycle time for 24 holes tapped .700 deep
    could there be another setting or parameter canceling this out?
    I also changed G84 to synchronous tapping with bit parameter #17
    I also hit the "backup" after the changes

    I didnt have much time on the machine today, tomorrow I want to watch closely the actual RPM and see what its topping out at.

    Tapping rate is S600 F30.
    Dont you think it would be able to reach 1200RPM as it travels from Z-.7 to R.1?

  10. #10
    Join Date
    Aug 2009
    Posts
    684

    Synchro S&Fs

    Hi,

    Will spindle go from 600 to 1200rpm without having to change gear?
    If current gear maxes at 600rpm maybe that will override the retract rate.

    DP

  11. #11
    Join Date
    Jun 2006
    Posts
    247
    Maintenance says there's no gears, but a low/hi range output by the spindle motor, I didn't find out what those ranges are yet

    I re-set the parameter to 100% and watched the actual rpm in cycle, it topped out right at 600 with time to spare

    When I set it back to 200%, the retract rpm topped out at 630
    same thing when I set it to 150%

  12. #12
    Join Date
    Dec 2008
    Posts
    3110
    Try setting aN RPM above 630 and let the G-code start the spindle
    then play with the retract speeds

    Code:
    G0 X0 Y0
    S750
    G56 H1 Z1.
    G71 Z1.
    G95 G284 Z-1. R0.5 F0.04 M53 ( pitch for a M6 tap )
    X1. Y0.
    X1. Y1.
    X0. Y1.
    G80 G94
    M5
    M9
    G30 P1

  13. #13
    Join Date
    Jun 2008
    Posts
    372
    "Maintenance says there's no gears, but a low/hi range output by the spindle motor"

    Not quiet. There are 2 sets of windings in the motor. To change range the spindle must stop

  14. #14
    Join Date
    Apr 2009
    Posts
    1262
    Try tapping starting at 650 RPM or an RPM high enough to put you in second "gear". Then you shouldn't top out as easily. I know tap size may limit your desired speed, so if need be back off on your z offset and try it in the air to see if it works.

    You should be able to find your machine's operating range in your Operation & Maintenance manual - different machines have different range limititations, but the machine will not "shift" during a tapping cycle - that may be your problem.

    Best regards,

  15. #15
    Join Date
    Mar 2009
    Posts
    1982
    There are 2 sets of windings in the motor. To change range the spindle must stop
    are You sure? There is no need to stop the spindle for eletrical gear shift
    the machine will not "shift" during a tapping cycle
    easy to try with lower feederate. It would be even easier to see, if retract feederate is different

  16. #16
    Join Date
    Jun 2006
    Posts
    247
    Thanks guys, I set the RPM to 650 and it came out at 1300

    Now I'm tapping at 1000 and coming out at 2000, it saved me 45 seconds per cycle

  17. #17
    Join Date
    Dec 2008
    Posts
    3110
    cheers :cheers:

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