My 3 axis skull...in progress - Page 46

CaptnJackSparrow · #**451** (**permalink**) 03-24-2008, 10:07 PM

A COOP order for Lindberg skulls is open right now at the "I Was Wondering.." thread: I was wondering?. RBC started the coop order today(Monday, 24th), so far we have abt 15-16 skulls to order. These are abt the best skulls to use for 3-axis motion, weighing in at just over a pound(Bucky skulls are 3lbs), very little mass for servos to sling around so they would operate much better than buckys. Searching eBay, or other hobby stores can get you a Lindberg, -at best- for $16 plus abt $10 to ship a single skull. Right now the prices for this multiple order falls in this range:

5-10 skulls =$13.00/ea
11-20 skulls= $12.00/ea

Apparently the dealer buys them for $10/ea so doesnt look like much chance to get down to a $10/ea price for us. I would think $11 would be rock-bottom, but that would prob be for 20-30 skulls. I think we could scare up at LEAST a 20+ skull order.. ESPECIALLY at these prices. Shipping will be costs to get to you, from her... I'm ordering 6 myself, so getting a high total should be pretty easy..

Anyone wanting to get in on this COOP order, please PM RBC and tell her the number of skulls you want, your shipping address, and how you'd be paying.. Paypal and checks(cashiers chk/Money Order) are good, however..

for Paypal payments(especially credit card).. the PayPal fee would prob be abt $2 for a 2 skull order, $3-$4 for a 4 skull order, and $5-$6 for 6 skulls... so I would plan to add that to the total, once there is a final, per-skull amt and shipping. If that fee is not added in, when you make your payment, the cash amt would be short that fee, and RBC would have to make up the differance... and we dont want to happen.. so please figure in the above amt.. If you want to send in a check/Money Order, then it would be just the COOP amount for the total, no fees. RBC has said that there is no profit in this for her, that it is cost-only!

If you wanna get some Lindberg skulls cheaper than you can find them anywhere, PM her, and get in on this COOP!!

We now return you to our regularly scheduled thread...

dionicia · #**452** (**permalink**) 03-26-2008, 06:54 PM

Quote:

Originally Posted by MrOCT31

Just in case anyone would like the condensed version, we created a .pdf file that is basically the instructions from this post to build the 3 axis skull but in a much easier format to use or study from:
http://www.calhaunts.com/downloads/3_axis_skull.pdf

MrOCT31, you have the patience of a God to put this together.

Thank you so much.

RBC · #**453** (**permalink**) 03-30-2008, 12:08 AM

Quote:

Originally Posted by HalloweenBob

Then, I worked on making the small steel armatures that attach to the center rod that goes through the rod end which is attached to the skull.

I posted a drawing of this on the first page. I will have all 4 of my rods in the next few days, and will take pictures of those as soon as I get them. For now, here is the drawing again:

The thin piece of metal between the two nuts where it says, "Rotate Armature Attached Here" is the piece I made next. In the drawing, you are seeing a side view, so it doesn't look like much. Using the one my friend fabricated for my first complete rod as a model, I made three more. Mine didn't come out as pretty, but they will be just as functional.

I started with a small random piece of steel.

Then I drew the shapes I needed to cut out with a sharpie and put it in a vise:

Next, with a hacksaw....a VERY DULL hacksaw, I did my best to cut out the pieces, and file the edges down. I put the three pieces back in the vise and drilled out the large holes where the rod goes through, then turned them over to drill and tap the holes that I will connect the linkages to that will rotate the skull left and right:

Finally, I tapped the holes:

And now I have all 4 of the rotate armatures needed for the central rods:

As I said, Mine were not pretty, but the holes are in the right places. My friend made the second one in. That's the one I copied. It does not have to be exact....thank goodness.

As I mentioned, I'll have a lot more detail on the central rod in the next few days.

I have found that a metal coat hanger wire works well to just cut the length you need and super glue it in the ends of link set-ups. I also use a ball and cap on the jaw wire ( this is the little thing that looks like a trailer hutch and the cap snaps down over it. and swivels ) that way the wire has less stress and don't break or rust. Hi HB its Blinky

RBC · #**454** (**permalink**) 03-30-2008, 12:26 AM

Thanks for posting that Jack,lol
you are a hoot

HalloweenBob · #**455** (**permalink**) 03-30-2008, 06:16 AM

Hey, Blinky!

I like the swivel connector for the jaw wire idea. I haven't had any trouble with mine, but it sounds like a good idea.

I would be a little concerned with the coat hanger wire, however. Parts of my routines have the skulls rapidly shaking their heads side to side. I would think that if the super glue even holds through that, the wire would bend from the stress. I would run something like that through some pretty rough stress tests before going that way.

RBC · #**456** (**permalink**) 03-30-2008, 07:37 AM

Quote:

Originally Posted by HalloweenBob

Hey, Blinky!

I like the swivel connector for the jaw wire idea. I haven't had any trouble with mine, but it sounds like a good idea.

I would be a little concerned with the coat hanger wire, however. Parts of my routines have the skulls rapidly shaking their heads side to side. I would think that if the super glue even holds through that, the wire would bend from the stress. I would run something like that through some pretty rough stress tests before going that way.

You May be right I have only used them to make them talk not move around.
do you still have the invoice the has the part # on them for the swivels and stuff. i'm trying to set up a group buy, Thanks

HalloweenBob · #**457** (**permalink**) 03-30-2008, 07:49 AM

The linkages I used were these:

http://www.servocity.com/html/2-56x3_16__mini.html

Although some people preferred the slightly larger versions here:

http://www.servocity.com/html/4-40x3_16__standard.html

As far as I can tell, either will work fine.

RBC · #**458** (**permalink**) 03-30-2008, 08:22 AM

Thank you HB hugs and Kisses

RBC · #**459** (**permalink**) 03-30-2008, 08:28 AM

Quote:

Originally Posted by HalloweenBob

The linkages I used were these:

http://www.servocity.com/html/2-56x3_16__mini.html

Although some people preferred the slightly larger versions here:

http://www.servocity.com/html/4-40x3_16__standard.html

As far as I can tell, either will work fine.

One more question HB.. what size metal strip did you use to make your brackets 1/4" or 1/2". Thanks Many Many Hugs
and how wide was the metal rotating arm piece befor you made it 1"?

DooBeeDooBeeDoo · #**460** (**permalink**) 03-30-2008, 09:07 AM

Very good stuff, HB, thanks.

I should be ordering enough stuff to be able to follow your lead on one skull and play with my own theories on the others.

There is going to be a ton of animated skull info on this forum in a few months! Wheee!