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Thread: CNC Zyto + Raspberry Pi

  1. #31
    Senior Member
    Join Date
    Jan 2012
    Location
    East Anglia UK
    Posts
    217
    A couple of pics of the vertical slide.
    This is an adaptation of a manual slide. The slide is a cheap copy of a "Myford" vertical slide. Poor choice on my part . It was badly manufactured and quite a way out of square. Had to spend much time correcting the errors before it was fit for purpose. Should have got the genuine Myford version in the first place.
    The processs of adapting it for CNC was fairly straight forward. New leadscrew 10 x 2mm trapizoidal, leadnut in Nylatron. This was a nice snug fit. The weight of the slide and spindle assembly keep the leadnut preloaded against the leadscrew so did not need a backlash eliminator.
    The stepper motor and leadscrew bearing support was machined from a single casting that screwed onto the moving slide in place of the original manual arangement.

    20150824_165539small.jpg

    20150824_165450small.jpg

    20150824_165601small.jpg

    A pic of the raw (one very raw indeed) castings for the stepper/bearing carrier.

    Photo0039.jpg

    The bearings are locked into position by half splitting the casting and clamping with a M6 socket head bolt. You can see the counterbore for this clamping bolt in the pics above.
    This assembly was all machined out on the "sister" Zyto manual lathe.

    A slightly late Happy New Year.

    Cheers
    MrGreg

  2. #32
    Senior Member
    Join Date
    Jan 2012
    Location
    East Anglia UK
    Posts
    217
    Quick update to complete

    Here is a close up of the split through the casting to the bore for the bearings. the clamp bolt is down inside the counterbore.

    split and clamp.jpg

    And the carrier being machined. It was a bit of a pain as I had to make (cast and machine) a custom faceplate and then drill the clamping screw holes with the offset from the centre to get the bearing bore in the correct position relative to the leadnut position on the fixed part of the slide assembly.

    Photo0041.jpg

    Cheers
    MrGreg

  3. #33

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