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Thread: Rotary table re-ferb ready for stepper motor

  1. #1
    Supporting Member thehomeengineer's Avatar
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    thehomeengineer's Tools

    Rotary table re-ferb ready for stepper motor

    Hi All
    This is the progress so far on the motorisation of my rotary table. Both the table and tail-stock were striped down for cleaning as I had to make a new modified worm shaft for 14mm Flexible Plum Coupling, so thought it would be a good idea as I had to take some of the table apart to get the old shaft out. rotary table worm shaft

    Unfortunately I got a bit carried away and decided a re-paint would be a good idea
    So all the the castings were striped down to bear metal and sprayed. I have reassembled both table and tail-stock and I am happy with the result even though I did wonder if it was worth it at the start.
    The next part of the build will be a mounting bracket to go between the Nema 34 stepper motor and the table. Below are some photos of the project

    Rotary table re-ferb ready for stepper motor-old-painted-casting-striped-down-cleaning.jpg
    Old green painted casting striped down for cleaning

    Rotary table re-ferb ready for stepper motor-sprayed-items.jpg
    Items sprayed incomplete scruffy spray booth

    Rotary table re-ferb ready for stepper motor-main-casting.jpg
    Main Rotary Table casting

    Rotary table re-ferb ready for stepper motor-masking-tape-removed.jpg
    Masking tape removed

    Rotary table re-ferb ready for stepper motor-ready-assembly.jpg
    Items ready for assembly

    Rotary table re-ferb ready for stepper motor-part-assembled.jpg
    Part assembled

    Rotary table re-ferb ready for stepper motor-tail-stock.jpg
    Tail-stock

    Rotary table re-ferb ready for stepper motor-img_3622.jpg
    Completed ready for stepper motor etc.

    Rotary table re-ferb ready for stepper motor-new-shaft-14mm-dia.jpg
    14mm shaft for Flexible Plum Coupling

    I will update the next parts in the near future
    Thank you for viewing
    The Home Engineer

  2. The Following User Says Thank You to thehomeengineer For This Useful Post:

    MeJasonT (10-20-2019)

  3. #2
    Supporting Member metric_taper's Avatar
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    metric_taper's Tools
    I'm curious about how your going to mount the motor. I had to look up Flexible Plum Coupling, and I think this is called a Jaw coupling here in the states.
    Is that some sort of additional platen that you made that has the parallel T-slots? Seems that would be handy for some setups vs. the radial slots.

  4. #3
    Supporting Member thehomeengineer's Avatar
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    thehomeengineer's Tools
    Hi metrc_taper
    There is an additional plate on the table which is very handy for two reasons: like you have pointed out the additional tee-slots and secondly the increase in diameter significantly improving the clamping area. I would like to say it was my idea but I bought the table from a friend who was clearing his late fathers workshop and he made the plate. The tailstock was a good find that just happened to be the correct size. Can’t remember where I found it
    The motor I have is a Nema 34 and I will be making a adapter/housing to join both the table and motor but I am waiting on the coupler to arrive so I can ensure the dimensions etc are correct. I did order a coupling but somehow bought the wrong bore size.
    Thank you for your interest

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    Supporting Member metric_taper's Avatar
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    metric_taper's Tools
    Sounds like you are having the motor do a direct drive without a gear box.
    I've been wanting to do this to my 12" RT as well. I've watched a few threads on the "Home Model Engine Machinist" forum. "Interrupt Driven Rotary Table Controller" and "Arduino Rotary Table for Dummies". Both are Arduino based.

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    Supporting Member thehomeengineer's Avatar
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    thehomeengineer's Tools
    It is direct drive (or I should say it will be��) hope to finish the control side of things this week and then make the motor mount when the coupler arrives. I have seen lots of good ideas and have tried to in corporate all the bits I like and more
    Which includes a power feed mode and all good electronic projects need LED’s. It has got to the stage where I am running a mega and nano arduino to drive the system.
    Will post when happy with controller.
    The Home Engineer

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    Supporting Member MeJasonT's Avatar
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    Thehome engineer
    What is the amperage of your nema 34 stepper motor, if it operates around 4A and you message me you may find i have something interesting to share.


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