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Homework - David DeMattia

Homework for live workshop student David DeMattia
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  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    See you in class!
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Here is a tap / drill size list.
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    It's about to begin.
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    @Chris Ellerby Would it be possible to get 3 or 4 images showing what Jim has done so far? THANKS!
  • Looks great David! Thanks for sharing the drill chart- I have downloaded it, but in reading it, I can't find reference to 4-40. Is there a trick to finding the small tap sizes we are using? I have never read these types of charts before.
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    edited March 26
    3/26/2017 - Started Work on Neck Project

  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭

  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭

  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭

  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    edited March 26
    @Katherine Hannaford The screw size is #4. (The 40 is how many threads per inch). By looking at the guide, the drill size on alum. for a 4-40 would be a #43 (tap) #32 (close file) and #30 (Free fit). Make sense? In other words, pick the number from the left hand column marked "Screw Size" (in your case a #4) then read across right to pick thread size then drill bit size.
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    @Katherine Hannaford
     Here is my box of Number Bits. The #43 on mine is missing (as well of most of the small bits!) because they are small and I tend to break them! Use a light hand.

  • edited March 28
    David DeMattia Thanks for that great explanation of the Drill Chart. I have a better understanding of how to read it!
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    03/28/2017 - Today's work. Had to improvised as I lost my mind and ordered some wrong parts.

  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    3/29/2017 - This is it till next time. Have to pack my art and hit the road.



  • Chris EllerbyChris Ellerby Los Angeles Admin
    Looking good!

    /Chris
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    HEY EVERYBODY! I'm back in the studio. For those of you in the states, you can get your aluminum (as well as other metals) at Discount Steel www.discountsteel.com . Pretty reasonable prices, will custom cut, nice people and they FedEx. I use them to buy steel for my sculptures. 


  • Dave VanderWekkeDave VanderWekke New Jersey
    Looks good David. How did you feel the servo city u joint was. Sturdy enough?
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Dave, This is just a prototype to work everything out. When I build the "real" mechanism, I'll use a more robust U-joint. I wouldn't use the servo city u joint for critical applications.
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    MY KINGDOM FOR 2 - 1/4x28 bolts! It's always something.....you think you have all the parts you need and BOOM! It's back to the hardware store.
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Decided to scrap work on the old mechanism and start again with the proper parts.




  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Just got my shipment of aluminum! 

  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Progress so far.

  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Today's progress.


  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Gluing in the plate to the skull. Holes tapped and ready to go!



    Opted to go with direct drive on the Left/Right head. Getting a nice rotation and movement. All of the weight is carried by the bearings so I'm getting a good speed with the foam skull. If I had a heaver head, I'd either use a bigger servo or get more leverage with what Jim taught.


  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    edited April 9
    Here is a test with a servo tester cycling through rough movements.


  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    edited April 10
    I think I may be DONE!



  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    4/10/2017 - Skull attached, cycling through basic movements.


  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    Now I have to hook it up to the radio control and mess with the presets to set servo limits. That's always a good time. 
  • David DeMattiaDavid DeMattia Saint Croix Falls, WI. ✭✭✭
    OK, this is it! The final neck is done and here is a demo with the radio control. Enjoy!


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