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Thread: Emco F3 mill conversion X Axis

  1. #13
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    Default Re: Emco F3 mill conversion X Axis

    I'll post some photos of the brackets once I have finished the milling (still have the holes for the 4x M6 ballnut mounting screws to drill).



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    Default Re: Emco F3 mill conversion X Axis

    Found a good online bolt circle diameter calculator at the Theoretical Machinist website. Here's the x,y offsets for the 6 mounting holes (holes 3&7 not required)
    Emco F3 mill conversion X Axis-screenshot-2018-11-06-06-49-43-a

    Last edited by fastbike; 11-05-2018 at 12:53 PM. Reason: duplicate


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    Default Re: Emco F3 mill conversion X Axis

    The stepper motor and driver arrived yesterday. This is from Steppers Online and is a NEMA34 size closed loop motor/driver rated at 8.5Nm holding torque.
    I measured the hole layouts for the existing X axis carriage endplates and have plotted those into QCAD.
    Next up is designing the replacement endplates (left end has the motor mount, right end is blank) and detail design for the ballscrew bearing support / motor mount.



  4. #16
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    Default Re: Emco F3 mill conversion X Axis

    While I've got the Z Axis carriage dismounted from the machine I will replace the bracket that holds the ball joint at the top of the Z Axis gas strut. This was offset as I just used existing holes and the angle bracket supplied with the strut. The centre of the lower mount is 40mm from the left of the column, and 75mm from the reference face. As the ball joint bolt has a 15mm offset from the centre of the strut, the mounting point needs to be X=40 and Y=60mm.
    I can either use the existing holes in the carriage and fabricate a new bracket, or use the existing bracket and drill new holes.



  5. #17
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    Default Re: Emco F3 mill conversion X Axis

    The ballscrew arrived today. Here's a photo of the ballnut/ballscrew sitting inside the milled recess. Holes for mounting screws yet to be drilled.
    Emco F3 mill conversion X Axis-imag1927-2-jpg

    Having fun with my Emco F3 and Super 11


  6. #18
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    Default Re: Emco F3 mill conversion X Axis

    Here's a couple of photos showing how the clamps that gripped the dovetail ways work.
    This one from the outside of the clamp
    Emco F3 mill conversion X Axis-imag1961-2-jpg
    And this one from the front/inside of the clamp
    Emco F3 mill conversion X Axis-imag1962-2-jpg
    The round bars were the cutters from an old pasta cutter that I had dismantled - thinking the steel would be handy one day

    Having fun with my Emco F3 and Super 11


  7. #19
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    Default Re: Emco F3 mill conversion X Axis

    Started reassembly of the mill. Here's the Z carriage remounted, showing the tapped M6 holes for the X axis ballnut.
    Emco F3 mill conversion X Axis-imag1965-2-jpg

    Having fun with my Emco F3 and Super 11


  8. #20
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    Default Re: Emco F3 mill conversion X Axis

    I've got the mill back together but have run out of project time for this year, with family coming from overseas for Xmas I need to move onto some domestic projects. Watch out for updates in 2019

    Having fun with my Emco F3 and Super 11


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Emco F3 mill conversion X Axis

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Emco F3 mill conversion X Axis