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  1. #25
    Gold Member diyengineer's Avatar
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    Talking

    Looking goood!!



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    Quote Originally Posted by hoss2006 View Post
    ...
    A couple pics below show the ballnut pocket needed in the saddle, I used my RF45
    but it doesn't have to be pretty.
    Just have at it with a grinder or use an endmill in a drill press and make a bunch
    of plunge cuts to get the stock out of the way.
    The dimensions are not critical.
    ...
    Hoss
    Just in case anyone was wondering. I had to do something similar to mine and I did it on the X2 so if you have one available, it will fit on the table.



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    Default X ballnut

    Hi Hoss,

    Are you using the stock retaining method where the two bolts just put pressure against the ballnut mounting block?

    Thanks
    Sean



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    Default X dimensions may vary

    Hi Hoss,

    I looked at your dimensions for the X ballscrew mod. I have a G0704 from Grizzly but your measurements would result in interference on my machine. I think the difference may lie in the clearance / height of the space under the table where the X ballnut will reside. My height before milling a pocket for the ballnut is .800 , I am guessing your space may be closer to 1.00
    or your Roton nut is smaller than my Thompson which is 1 in sq + the ball return on one side. I compared my measurements to yours and they were the same except that I had the pocket at .260 deep and a small slot to clear the ballscrew. If I remember correctly this gave around .050 clearance between the ballnut and the table. My table has a 3 stamped in the right end. Hope it helps.

    Sean

    P.S. would you mind to post the Gcode for the oil slots?

    Thanks



  5. #29
    Gold Member hoss2006's Avatar
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    Quote Originally Posted by duzallcnc View Post
    Hi Hoss,

    I looked at your dimensions for the X ballscrew mod. I have a G0704 from Grizzly but your measurements would result in interference on my machine. I think the difference may lie in the clearance / height of the space under the table where the X ballnut will reside. My height before milling a pocket for the ballnut is .800 , I am guessing your space may be closer to 1.00
    or your Roton nut is smaller than my Thompson which is 1 in sq + the ball return on one side. I compared my measurements to yours and they were the same except that I had the pocket at .260 deep and a small slot to clear the ballscrew. If I remember correctly this gave around .050 clearance between the ballnut and the table. My table has a 3 stamped in the right end. Hope it helps.

    Sean

    P.S. would you mind to post the Gcode for the oil slots?

    Thanks
    The Roton nuts are 1 inch square too, with the screws in the original end brackets, I still have about .050 under the nut in the pocket.
    One of those variances folks will have to take into account between machines. It's not a critical bit of machining. Thanks for the info.
    I can give the dxf for the oil grooves, same for all 4 flats on the saddle,
    haven't done the z yet, it'll be different.
    The Phase 2 prints are done.
    http://www.g0704.com/phase_1_and_2_cnc.html
    It's gonna be a good while before I move on to Phase 3,
    I want to have some fun just using the mill under CNC for a while first.
    Need to get it all plumbed for oil and then build a console, a Voight-Kampff machine clone perhaps.
    Hoss

    Attached Thumbnails Attached Thumbnails Hoss's G0704-voight-kampf-jpg  
    Attached Files Attached Files
    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com


  6. #30
    Gold Member hoss2006's Avatar
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    Quote Originally Posted by mrcodewiz View Post
    Just in case anyone was wondering. I had to do something similar to mine and I did it on the X2 so if you have one available, it will fit on the table.
    Good point.
    Probably a lot of us have and X2 to handle some of the work
    now that we upgraded to the 0704.
    Always nice to have a 2nd machine.
    Hoss

    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com


  7. #31
    Gold Member hoss2006's Avatar
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    One more rapid test.
    This isn't a baseline test with Mach 3 at the minimum 25000 Hz kernel speed like before.
    I ran a cable to a good PC and jumped the kernel speed to 45000 Hz.
    With the driver at 1/8 microstepping, 300 IPM came easy with the column still on the table.
    Good enough for me.
    Here are the electronics used.
    570 oz/in Nema 23 Stepper motor, Keling KL6050 driver, 48V.
    http://www.g0704.com/G0704_electronics.html
    Motor tuning settings - Steps Per 8000, Vel. 300, Accel. 60.
    Also shows the motor on the left side of the table as an option.
    Hoss

    [nomedia="http://www.youtube.com/watch?v=3639EIzUc6w"]YouTube - G0704 Max Realistic Rapid Speed[/nomedia]

    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com


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    Hoss,

    do your phase2 plans include information on AC bearings for the ballscrews, where to buy them, and prints for bearing blocks and preloading them properly?

    If so, how much are the bearings that you're recommending?

    Ian


  9. #33
    Gold Member hoss2006's Avatar
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    Quote Originally Posted by tmbg View Post
    Hoss,

    do your phase2 plans include information on AC bearings for the ballscrews, where to buy them, and prints for bearing blocks and preloading them properly?

    If so, how much are the bearings that you're recommending?
    Yes to all, the most expensive AC's are for the Z axis at $8.43 for Nachi's.
    Hoss

    http://www.hossmachine.info - Gosh, you've... really got some nice toys here. - Roy Batty -- http://www.g0704.com - http://www.bf20.com - http://www.g0602.com


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    Excellent. I placed an order for a g0704 and a
    G0602, but they're both backordered. I figure I'll snag the plans from you so
    I can keep the wheel reinvention to a minimum. Intending to go with roton screws and oversized balls. I have a Bridgeport clone and an old
    Clausing 12x40 lathe so the conversion should be a piece of cake.

    Ian


  11. #35
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    will the precut stock kit come with the phase 2 plans as well? the link goes to the phase 1 and 2 plans together just didnt spell it out in the stock kit link...

    http://www.g0704.blogspot.com/


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    Quote Originally Posted by hoss2006 View Post
    One more rapid test.
    This isn't a baseline test with Mach 3 at the minimum 25000 Hz kernel speed like before.
    I ran a cable to a good PC and jumped the kernel speed to 45000 Hz.
    With the driver at 1/8 microstepping, 300 IPM came easy with the column still on the table.
    Good enough for me.
    Here are the electronics used.
    570 oz/in Nema 23 Stepper motor, Keling KL6050 driver, 48V.
    http://www.g0704.com/G0704_electronics.html
    Motor tuning settings - Steps Per 8000, Vel. 300, Accel. 60.
    Also shows the motor on the left side of the table as an option.
    Hoss



    Hoss-

    I was looking at your electronics list - on the 'best' setup, what do you get out of the C11G that you don't get from the C10 BOB?



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