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Thread: Info for Dan Noren (and anyone else who wants to read)

  1. #1
    Join Date
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    Info for Dan Noren (and anyone else who wants to read)

    Dan,

    Your message was on our answering machine after our power was restored this evening. We had some serious storms in the area and lost power shortly after you called. Anyway, on with it.

    The bit I used is a single-flute 1/8". The other parameters are in the header of the gcode file as seen below.

    (Generated by SketchUcam V1.3)
    (File: CNC_SpindleBracket.skp)
    (Bit diameter: 1/8")
    (Feed rate: 30"/min)
    (Plunge Feed rate: 5"/min)
    (Material Thickness: 1/2")
    (Material length: 3 1/4" X width: 5 3/4")
    (Overhead Gantry: true)
    (Multipass enabled, Depth = 1/16")

    This is from the gcode for cutting one bracket. It's the same in the file for two brackets. At the 30ipm feed rate, I got good chips and no burning.

    One thing to check if you haven't already is which way your spindle is rotating. I've mentioned this before, but when wiring according to the published instructions my spindle was spinning the bit clockwise. I didn't catch that at first. Obviously, it makes a big difference between melting the plastic and cutting cleanly.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  2. #2
    Join Date
    Dec 2008
    Location
    falcon heights, minnesota
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    now is that clockwise looking from the top of the spindle (silly question i know, but needed to ask, just the way my day has been going)?
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  3. #3
    Join Date
    May 2007
    Location
    Thomasville, GA
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    Quote Originally Posted by Dan Noren View Post
    now is that clockwise looking from the top of the spindle (silly question i know, but needed to ask, just the way my day has been going)?
    The correct direction will be clockwise viewing the top of the spindle. That means the bit is being spun counter-clockwise which is correct for a router bit.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  4. #4
    Join Date
    Dec 2008
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    falcon heights, minnesota
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    So an up spiral is just the opposite of a normal drill bit?
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  5. #5
    Join Date
    May 2007
    Location
    Thomasville, GA
    Posts
    5,987
    No. Both should spin counter-clockwise if you're looking at the bit itself.
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  6. #6
    Join Date
    Dec 2008
    Location
    falcon heights, minnesota
    Posts
    5,605
    So I should cross the wires to the spindle so that it spins counterclockwise?
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  7. #7
    Join Date
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    Location
    Thomasville, GA
    Posts
    5,987
    What direction is your spindle spinning when you look at the top now?
    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  8. #8
    Join Date
    Dec 2008
    Location
    falcon heights, minnesota
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    Looking at it from the top, it is spinning clockwise.
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

  9. #9
    Join Date
    May 2007
    Location
    Thomasville, GA
    Posts
    5,987
    Then you should be good to go. The spindle speed I set is 5000rpm. You can see that near the gcode header on the line "M3 S5000". If you're using the variable spindle speed module, it should read that speed.

    The bit I used can be seen here on ebay.

    Click image for larger version. 

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    Bill Arnold
    Citizen of Texas residing in Georgia.
    NRA Life Member and Member of Mensa
    My Weather Underground station

  10. #10
    Join Date
    Dec 2008
    Location
    falcon heights, minnesota
    Posts
    5,605
    i was using my last 2 flute bit when i tried to cut the brackets. hard to tell what the speed is with the manual control. just the knob to turn it up and down.
    benedictione omnes bene

    www.burroviejowoodworking.com

    check out my etsy store, buroviejowoodworking

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