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Thread: Bit PCL583659 1/16" Ball V Carve

  1. #1
    Join Date
    Nov 2017
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    3

    Default Bit PCL583659 1/16" Ball V Carve

    I am new to Shopbot and mostly doing Hardwood sign work at the moment. I did some lettering with the PCL583659 on oak and Pecan wood plaque and experiencing fuss around the cut. Does anyone know of a version of this bit in a downcut ? If so would it help with this issue on wood. I slowed the cut rate to 1/sec down for 3 . No big difference.

  2. #2
    Join Date
    Jan 2004
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    iBILD Solutions - Southern NJ
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    7,515

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    There's no such animal as a downcut ball unless you get one custom ground...even so, the geometry of the bit will not cure the problem.

    Small bits NEED high RPM to shear off the material cleanly. My suggestion is to crank the RPM all the way up (assuming 18k...faster is better) and keep your feed rate somewhere in the 1 to 1.5 IPS range.

    Some materials are just stringy or hairy from time to time - oak being no exception. I've carved my fair share of stringy oak...Even boards made from the same tree can show a condition where one machines beautifully and the next is a stringy mess. It happens. We all want 'finish ready' work coming off the machine, but sooner or later you have to break out the sandpaper - or maroon scotch pad (for 3D). Such is life working with natural materials.

    Be sure to 3D raster parallel to the grain. Going across the grain will amplify the problem, as will offset.

    -B
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - IBILD.com

  3. #3
    Join Date
    May 2014
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    MA
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    258

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    I run a 1/4 inch down spiral ball mill: Amana Tool 46476 Solid Carbide Double Flute Down-Cut Ball Nose Spiral 1/8 R x 1/4 D x 1 CH x 1/4 SHK x 2-1/2 Inch Long Router Bit https://www.amazon.com/dp/B0112THXPC..._fgdkAbX48R8RV

    It's great for making radiused pockets

  4. #4
    Join Date
    Jan 2004
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    iBILD Solutions - Southern NJ
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    Hmm...Interesting! Thanks for the link.

    I'd like to hear/see a comparison/follow-up for those testing them out on a 3D relief compared to a 2-flute ball end mill in the same piece of wood, diameter, settings etc. Who's up to the challenge?

    This could be the answer to fuzzies...but I'm not holding my breath

    -B
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - IBILD.com

  5. #5
    Join Date
    May 2014
    Location
    MA
    Posts
    258

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    I'm not entirely sure that it's an answer to the above problem, but it might be. I just figured you'd want to know it existed. I got this bit because I was making some cutting board channels. It never occurred to me that something like this wouldn't exist. Thanks Amazon!
    '

  6. #6
    Join Date
    Dec 2000
    Location
    Thorp, WI
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    2,523

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    Hmm, if they had a 0.125" and 0.0625" diameter, I'd try one.
    Scott

    If guns kill people, I guess pencils misspell words, cars drive drunk and spoons make people fat.

    "Those who hammer their guns into plows, will plow for those who do not" - Thomas Jefferson


  7. #7
    Join Date
    Dec 2008
    Location
    Diamond Lake, WA
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    1,481

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    Toolstoday.com

    https://www.toolstoday.com/solid-car...e-spirals.html

    also has this bit and a 1/2" down-cut ballnose. I didn't know these existed either. Good to know.
    Don
    Diamond Lake Custom Woodworks, LLC
    www.dlwoodworks.com
    ***********************************
    Life is not a journey to the grave with the intention of arriving safely in one pretty and well preserved piece; But to skid in broadside, thoroughly used up, worn out, bank accounts empty, credit cards maxed out, defiantly shouting "Geronimo"!

    If you make something idiot proof, all they do is create a better idiot.

  8. #8
    Join Date
    Oct 2006
    Location
    Five Quarter Studio, Inc., Saugerties NY
    Posts
    33

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    My workhorse bit for my sculpture and bowls is the downcut 1/2" ballnose. Very little hand cleanup required.
    Attached Images Attached Images

  9. #9
    Join Date
    Jan 2004
    Location
    Norman, Ok
    Posts
    3,096

    Default

    Well, I guess that answers that.

    Thanks for posting. Nice shots too!

  10. #10
    Join Date
    Jan 2004
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    iBILD Solutions - Southern NJ
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    Joel,
    Real purdy

    Thanks for posting pics of your results with this grind.

    -B
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - IBILD.com

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