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Topics - Oldeworldsmith

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Crow T. Robot / Netflix Crow's Arms & Shoulder Joints
« on: November 21, 2018, 12:31:47 PM »
Iíd like to share my explorations of Netflix Crowís new arms in the hopes of maybe stirring some thoughts and feedback. Iíve tried contacting some of the folks who bought the actual bot props as part of their Kickstarter rewards but have so far not had anyone get back to me about the measurements and attachment materials.

In the meantime, Iíve used the available promo images of Crow & Hampton Yont as well as several photos I took of Grant & Crow at this yearís Live Show to figure out some sizes. I used the known width/diameter of the foam insulation tubes (1.5Ē) to then scale-measure the rest of the arm rods and joint spacers. Itís not a perfect way of determining the sizes, but I think the consistent measurements that I did get via this method must be pretty close (within a quarter inch or less) if not spot-on.

What all the images in this post are about however, is in regards to the joint that joins the resin shoulder/lamp fixture to the arm assemblies. Itís clearly quite different than the multi-piece rod assemblies that were used with ďclassicĒ Crow. The ribbed rubber tubing now sits directly below the shoulder fixture which then gives way to the first of the lamp-arm, ďtriangle,Ē joint/bracers.

(Click the images for larger views)

The other point to observe is how much free-range movement the arms now achieve when puppeteered. That means the connection from the shoulder to the arm cannot be hard connection like a bolt, as was used in the past, which only allowed for one angle of movement (back & forth). So that means we need a new flexible, yet sturdy attachment method. Of course, whatever that is, itís being completely hidden by the ribbed tubing.

Still, I think Iíve come up a possible solution. I canít say that this is how theyíve done it for the actual Crow puppets. Iíve no doubt the super-fancy new 3D printed part options and professional companies who are now throwing in for the construction of the props on the show have done something FAR cooler and engineering-worthy. But I have to say, what I kludged together WORKS, is super inexpensive, and itís in spot thatís going to be hidden by that tubing anywayÖ So who cares? (Well still I do, but Iím very much satisfied with this for now)

As you can see in the photos, all Iíve done is create a semi-loose plastic loop that threads through both the resin shoulder hole and the lamp joint. Iíve done this by using the smallest zip-ties I could find (0.81Ē diameter), pulling them only so tight so that the top edge of the lamp joint (where the zip tie will always be visible) is pulled up into the ribbed tubing, where it remains hidden, just like the screen-used Crow.

As youíll see in the video link below, this allows me the same multi-directional range of motion we observe the Crow puppetís arms performing on screen. Itís quite secure as well. My only concern is the potential wearing down of the resin shoulder hole where the zip-tie is threaded through over time, due to friction. But for a personal prop that wonít likely see any heavy-action performances, I think this is a pretty decent solution.

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