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DRO for milling machine

Discussion in 'Shop Talk' started by farmerlund, Apr 3, 2019.

  1. farmerlund

    farmerlund Senior Member

    Joined:
    Nov 23, 2014
    Messages:
    574
    Occupation:
    Farmer/ excavator
    Location:
    North Dakota
    Hey guys looking for a DRO for my Bridgeport. I don't need a real complicated setup. I would like the ability to set up holes in a perfect circle. PCD function I think its called? What's the better glass scales, magnetic? pros-cons.

    I have seen $150 kits and $1500+ kits I just want something decent and easy to use. Remember I am the weakest link in the operation. Was looking at some thing like this.


    Thanks for your help
    https://machinetoolproducts.com/ditron-d80-3-axis-mill-dro-kit-w-glass-scales
     
  2. Wytruckwrench

    Wytruckwrench Senior Member

    Joined:
    Jul 23, 2012
    Messages:
    270
    Location:
    Wyoming
    I got some $30.00 ones from amazon. Set three of them up on my mill.
    Simple and cheap.
     
  3. gtermini

    gtermini Well-Known Member

    Joined:
    May 29, 2015
    Messages:
    197
    Location:
    Amity, OR
    Newall with the magnet ball tube scales are very easy to install and hold up well against dirt/oil/grime I think DP500 is the lower function model. About $700. User interface is easy. I have DP700's on 6 mills in the machine shop. All hold thousandths easily.

    I never use PCD for bolt circles only because I've memorized the trig values for 3/6/12 and 4/8 patterns. Just zero on the center and don't worry about whether I keyed in something wrong.

    3/6 is (X=.866*radius, Y=.500*radius) & holes at (X=0, Y=radius)

    4 @90 deg straight is (X=radius, Y=0) & (X=0, Y=radius); 4@ 45 deg is (X=.707*radius, Y=.707*radius)
     
  4. farmerlund

    farmerlund Senior Member

    Joined:
    Nov 23, 2014
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    Occupation:
    Farmer/ excavator
    Location:
    North Dakota
    thanks gtermini, I will look in to them
     
  5. Rob Gunn

    Rob Gunn Well-Known Member

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    Mar 18, 2013
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    Location:
    Buchanan, MI
  6. Steve Bowman

    Steve Bowman Well-Known Member

    Joined:
    Jul 12, 2018
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    Occupation:
    Maintenance
    Location:
    Southern Ohio
    What did you end up choosing?

    The lcd units from dropros look very nice.
     
  7. farmerlund

    farmerlund Senior Member

    Joined:
    Nov 23, 2014
    Messages:
    574
    Occupation:
    Farmer/ excavator
    Location:
    North Dakota
    I discovered my Bridgeport is predrilled for a Acurite set up so I am thinking of using them. haven't ordered it yet.