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Thread: Osprey CNC upgrade

  1. #11
    Join Date
    Feb 2008
    Location
    East Freeetown, Massachusetts
    Posts
    2,702
    Well, I tried something new today.

    As part of the upgrade I needed to cut access holes into the welded steel frame. The steel is low carbon steel and not all that thick. It should be a piece of cake, but these routers are not machining centers and not really designed to cut steel.

    So the cutting parameters

    1) I just happened to have - 5 flute SGS TiAln coated end mills.
    2) I ran at 8000 RPM
    3) I ran about 20 IPM
    4) I used a spiral ramp infeed at .002 DOC
    5) I used Tap Magic cutting fluid

    No problem at all.

    Click image for larger version. 

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    The hole is 1" wide x 3" long.

    I will be bolting the 8020 with 2 - 1/2-20 High strength bolts. I am making special washers that are 1/4 thick 1" wide and 3" long. Each washer will have 2 holes for the bolts. The bolts will go through the 3" square 8020 extrusion with the special washers and very very very tight.

    All of this so I can make CNC dovetail joints. I have seen some really cool joints out there. I will not be bound to the restrictions of a template.

  2. #12
    Join Date
    Dec 2006
    Location
    Yorktown, Virginia
    Posts
    4,610
    Wow! That cut cleanly. No chatter or excessive heat. Very nice.

  3. #13
    Join Date
    May 2007
    Location
    Kansas City, Missouri
    Posts
    12,808
    That will work! I hadn't done any metal until last year on mine, just did some aluminum, but won't hesitate to do it again. I will work out a better splash pan before doing it again, other than the mess it cut well.
    Darren

    To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault

  4. #14
    Join Date
    Jul 2011
    Location
    The Gorge Area, Oregon
    Posts
    4,470
    Love thy neighbor, yet pull down not thy hedge.

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