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Thread: Another digital dividing head

  1. #1
    Eaglewood's Avatar
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    Another digital dividing head

    So I needed a dividing head and at my advanced age I have trouble concentrating. I knew I would lose count or forget where I was entirely and thats why this was born.
    It is powered by an Arduino,driver, stepper motor and a 60:1 worm.
    My son is a talented programer and a God send for this project as I don't know hot from neutral. There is an interlock switch which tells the program and LEDS that the spindle is locked so I can't advance even if I don't pay attention to the lights. I bypassed the dip swiches in the driver so the program can choose an appropriate fraction of steps for what I have chosen. I can also go forward, backward,go to an inputted step and choose a speed. Hopefully soon a feature to select angles as an option to steps will be added.
    The head uses an Atlas spindle mounted in an AL. structure with tapered roller bearings. I rebuilt the chuck ( company went out of business in 1948) and reground the jaws to insure concentricity. I do not have sophisticated measuring equipment so checking accuracy is iffy at best, but an initial go shows it to be quite accurate, certainly within .001/.002.
    I am not a photographer or the son of one so please don't think badly of me for the pic quality.
    Dick
    Another digital dividing head-div-lock.jpgAnother digital dividing head-div-switch.jpgAnother digital dividing head-img_0512div-front.jpgAnother digital dividing head-console.jpgAnother digital dividing head-div-back.jpg

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  3. #2

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    Very nice sir! Can you describe the locking mechanism?

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    rlm98253 (10-05-2018)

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    Another digital dividing head-lock-1.jpgAnother digital dividing head-lock-2.jpg

    Hope this helps. The lock is basically a clamp pivoting below the spindle using a 1/2-13 shaft as a clamp and brass inserts to clamp. There is also an eccentric collar on the shaft retained with a set screw to activate the switch that is not in the pics.
    dick

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  7. #4
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    That is very nice.

    It would be great if you (or your son) posted the schematic of the electronics. Maybe even the ardunio Sketch. Then I could maybe build one...

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    I have the wiring diagram and will ask my son to post the sketch.

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    Oops I meant I will post the diagram tomorrow and the sketch asap.

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    Another digital dividing head-dividing-head-schematic.jpgAnother digital dividing head-dividing-head-schematic-2.jpgAnother digital dividing head-dividing-head-schematic-3.jpgAnother digital dividing head-dividing-head-schematic-4.jpgAnother digital dividing head-dividing-head-schematic-5.jpgAnother digital dividing head-dividing-head-schematic-6.jpgAnother digital dividing head-dividing-head-schematic-7.jpgAnother digital dividing head-dividing-head-schematic-8.jpg

    The 8 page wiring diagram.

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    Hi. Fantastic work and thank you for posting. Does the Arduino require any code? and if so would it be possible to post it please.

    Thank you.

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    I will post the code soon.
    Dick

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    Code for the Project

    Here is the code that is currently running on this Divider. Happy to answer any questions.

    Divider_Code_V0.9.zip

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