Homework - David DeMattia

Chris Ellerby · March 2017

Homework for live workshop student David DeMattia

David DeMattia · March 2017

See you in class!

David DeMattia · March 2017

Here is a tap / drill size list.

David DeMattia · March 2017

It's about to begin.

Image: https://us.v-cdn.net/5020761/uploads/editor/it/hpe5dgrix3nw.jpg

David DeMattia · March 2017

@Chris Ellerby Would it be possible to get 3 or 4 images showing what Jim has done so far? THANKS!

Katherine Hannaford · March 2017

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 DeMattia · March 2017

3/26/2017 - Started Work on Neck Project

Image: https://us.v-cdn.net/5020761/uploads/editor/el/42v4vhc02rmu.jpg

David DeMattia · March 2017

David DeMattia · March 2017

Image: https://us.v-cdn.net/5020761/uploads/editor/be/l4eq0ski14bb.jpg

David DeMattia · March 2017

Image: https://us.v-cdn.net/5020761/uploads/editor/1b/mb80h5cgbxm6.jpg

David DeMattia · March 2017

@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 DeMattia · March 2017

@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.

Image: https://us.v-cdn.net/5020761/uploads/editor/rj/ht9rxwadu5rh.jpg

Katherine Hannaford · March 2017

David DeMattia Thanks for that great explanation of the Drill Chart. I have a better understanding of how to read it!

David DeMattia · March 2017

03/28/2017 - Today's work. Had to improvised as I lost my mind and ordered some wrong parts.

Image: https://us.v-cdn.net/5020761/uploads/editor/fo/16wuhhkoi9r0.jpg

David DeMattia · March 2017

3/29/2017 - This is it till next time. Have to pack my art and hit the road.

Image: https://us.v-cdn.net/5020761/uploads/editor/9v/by5y2z8nfdnq.jpg

Chris Ellerby · March 2017

Looking good!

/Chris

David DeMattia · March 2017

David DeMattia · April 2017

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 VanderWekke · April 2017

Looks good David. How did you feel the servo city u joint was. Sturdy enough?

David DeMattia · April 2017

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 DeMattia · April 2017

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 DeMattia · April 2017

Decided to scrap work on the old mechanism and start again with the proper parts.

Image: https://us.v-cdn.net/5020761/uploads/editor/lm/r84pdf9taj6g.jpg

Image: https://us.v-cdn.net/5020761/uploads/editor/1n/8nr3vr7zbbvv.jpg

David DeMattia · April 2017

Just got my shipment of aluminum!

David DeMattia · April 2017

Progress so far.

David DeMattia · April 2017

Today's progress.

David DeMattia · April 2017

Gluing in the plate to the skull. Holes tapped and ready to go!

Image: https://us.v-cdn.net/5020761/uploads/editor/9o/wxpsai12qvcz.jpg

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.