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Thread: Slow pocket on small holes with ramps

  1. #1
    Join Date
    Mar 2016
    Location
    Little Rock, AR
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    Default Slow pocket on small holes with ramps

    I use a 1/4" bit to pocket about 10 holes on a process that I do regularly. These holes are 3/8" diameter.

    The problem I have, because of the ramp and a circle, it takes a really long time per hole (about 1 min./hole making 3 passes to the 3/4" depth)

    I program a 1" zig zag ramp. Is there something I can do to make this go faster?

  2. #2
    Join Date
    Sep 2008
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    San Jose del Cabo based since 1997
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    1,244

    Default

    3/8" diameter bit using peck drilling function
    Vector Studio 22

  3. #3
    Join Date
    Dec 2000
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    Thorp, WI
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    2,845

    Default

    If you have to use a 0.25" bit, you can try raising your plunge rate for the tool, but due to the size or short length of the toolpaths, the machine may never get out of ramp rate speed. You could up that a little as well for this situation. VR and adjust ramp value and maybe even the move ramp rate value. Record the defaults to return to later.
    Scott




  4. #4
    Join Date
    Mar 2016
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    Little Rock, AR
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    5

    Default

    gc3 I am trying to avoid a tool change.

    Scott, thanks. I'll play around with those values.

  5. #5
    Join Date
    Apr 2013
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    Kennebunkport, Maine
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    Default

    Try a Profile Toolpath, Inside the line, WITH a Spiral Ramp.
    Use a fair amount of spirals as it goes VERY quickly.
    X,Y Feed nowhere near as important as Plunge Speed for finding the sweet spot to keep bit cool!
    A couple test holes should give it to you.
    Allowance will let you dial in a Perfect size, and a Final Pass(under Edit Passes) of say .001" gives a Nice smooth hole , as there's virtually no pressure in the bit.
    Another benefit is you can use it for holes 50-90% of the Diameter of the bit
    I had three different size holes on my modified Bill Young spoilboard I made 2 of....and it was only 1 bit for the holes

    Used it on thousands of buttonholes, and cribbage board holes, as it turned out to be the fastest/cleanest method.
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    scott P.
    2013 Desktop/spindle/VCP 11.5**
    Maine

  6. #6
    Join Date
    Apr 2007
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    Marquette, MI
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    3,388

    Default

    Use a profile with spiral ramp, not a pocket
    Gary Campbell
    GCnC Control
    GCnC411(at)gmail(dot)com
    Servo Controller Upgrades
    http://www.youtube.com/user/Islaww1


    "We can not solve our problems with the same level of thinking that created them"
    Albert Einstein


  7. #7
    Join Date
    Mar 2016
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    Little Rock, AR
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    Default

    It's amazing how something as simple as that can be overlooked by me for so long. Pocket vs. inside profile. Thank you! That did in in about 1/5 the time and no telling how much more life I'll get out of my bits.

  8. #8
    Join Date
    Dec 2000
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    Thorp, WI
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    Default

    Good catch, spiral is what I do as well, but got hung up on your "pocket and ramp".
    Scott




  9. #9
    Join Date
    Jan 2004
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    iBILD Solutions - Southern NJ
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    Watch out for nails...

    Gene.... Palumbo was trying to link up with you
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