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Feeds and Speeds help

Discussion in 'General Chit-Chat' started by Wesley Powell, Dec 11, 2020.

  1. Wesley Powell

    Wesley Powell Account Rep

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    May 29, 2018
    Lima, OH, USA
    Okay everyone, so I'm still fairly new to CNC world and I'm looking for some knowledge you all may have. My parents are redoing their bathroom, so I'm making them a new vanity and closet out of Maple Plywood. I have everything designed and ready to go but I'm just curious what kind of settings and bits you've found have worked best for you. Any input would be greatly appreciated, and also we have a Laguna Smartshop M router for reference.
     
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  2. MoultrieMade

    MoultrieMade Member

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    Jul 15, 2017
    Moultrie, GA
    For 3/4" plywood, I use a 2-flute, 3/8" compression bit, 19,000 rpm, ~150 ipm. I do two passes - one climb cut, almost full-depth (leaving a thin onion-skin to help with vacuum hold-down), followed by another full-depth conventional cut. The climb cut is good for hogging out a lot of material, as any machine deflection will move the bit away from the cut line. The very light conventional-cut pass takes care of the material left from that deflection, and leaves a very nice edge on plywood.

    I could probably double that feedrate and still be ok, but plywood jobs are usually one-off's' for me, so I'm not in a hurry. This is with a 5hp spindle.
     
    • Like Like x 2
  3. Jester

    Jester Slow is Fast

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    Dec 2, 2019
    SoCal
    You might want to try the free trial version of speeds and feeds calculator at www.cnccookbook.com
     
    • Like Like x 1
  4. Josh Martinez

    Josh Martinez X-Edge Products Excellent Speed, Excellent Quality

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    Sep 11, 2020
    Grand Rapids

    Wesley,

    Do you still need help with feeds and speed for your router? I work for a tool mfg and can would like to help. https://www.xedgetools.com/x-edge-store/ROUTER-BITS-c49357169

    What size is your spindle and do you have a tool changer?

    Best regards,

    Josh
     
  5. Wesley Powell

    Wesley Powell Account Rep

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    May 29, 2018
    Lima, OH, USA
    Josh,

    Our machine has a 5.5 hp spindle and yes we have an automatic tool changer.
     
  6. Josh Martinez

    Josh Martinez X-Edge Products Excellent Speed, Excellent Quality

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    Sep 11, 2020
    Grand Rapids
    Wesley,

    I would use a 1/4" or 3/8" compression bit. This will give you a clean top and bottom finish. The thing with compression bit is that you have to run it at a high feed rate so tool does not get hot. When the tool gets hot it will dull quickly. What tools do you have? How thick is your maple plywood?

    Josh
     
  7. Wesley Powell

    Wesley Powell Account Rep

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    May 29, 2018
    Lima, OH, USA
    I'm using an Amana Tool 46170-K CNC SC Spektra Extreme Tool Life Coated Compression Spiral 1/4 D x 7/8 CH x 1/4 SHK x 2-1/2 Inch Long 2 Flute Router Bit and the plywood is 3/4".
     
  8. Josh Martinez

    Josh Martinez X-Edge Products Excellent Speed, Excellent Quality

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    Sep 11, 2020
    Grand Rapids
    I can give you the info for our tool that is comparable. With router your size run the 1/4" compression bit 20,000 RPM at 250 IPM, 2 passes, conventional cut. Hope this helps.

    Josh
     
  9. Wesley Powell

    Wesley Powell Account Rep

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    May 29, 2018
    Lima, OH, USA
    Thank you so much!
     

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