Step 6: Beak Mechanism

The beak mechanism is the “creme de la creme” of RoboBrrd. To illustrate its elegance in words, the beak mechanism allows for the two beak halves to open at once, rather than lifting one half of the beak.

To begin with the beak mechanism, we first have to mount the servo for the beak. This should be placed in the middle of the back left platform. We will then attach a 4-point servo arm to the servo and glue on the popsicle stick arm. The popsicle stick arm should have a hole near the end, and it should also be securely glued onto the servo’s servo arm.

We will thread the beak halves with a 10cm piece of coffee stir stick. Now, in order to make the rotation of the beaks on these coffee stir sticks about a more central fulcrum, we need to cut some small ‘blocker’ pieces that will stop the beak from falling. There should be a couple of millimetres of clearance between the blocker and coffee stir stick.

Next, we need to mount this coffee stir stick to the face. Sometimes adjustments have to be made, so it is better to first measure everything and temporarily mount them with sticky tack.

When both halves are mounted onto their coffee stir sticks, you should ensure that there is enough room to open and close the beak. The gap between the two beak halves should be a little less than 1cm. When testing this, it is important to be rotating the beaks about their fulcrum, which will be closest to the back of the beak where the vertical popsicle stick is. The blocker that was just mounted should be assisting you with this.

Now we have to measure the length of the axels that connect the beak to the popsicle servo arm. To do this, it is critical that the popsicle servo arm’s hole is located directly where the middle of the two beaks will be.

To measure the length of the axels, take a blank popsicle stick and hold it on the beak where the hole is, and move the other end to where the popsicle servo arm is. Draw a line for where the axel should be cut. If this is done correctly, they should be the same (or very close, within a few mm) length.

Poke holes in each end of the axel and attach them with some solid core wire to the beak and popsicle servo arm.

Test the mechanism by manually moving the servo. You should check and see if the beak is able to smoothly open and close. If it does not, see where the modifications need to be made. Usually it is something blocking something else from moving.

When the testing is complete, you can remove the sticky tack from the coffee stir sticks and mount them using hot glue.

Next, we need to prevent the beak from moving horizontally. We will use small coffee stir sticks mounted vertically to assist with this task. They should be placed about 1cm apart from the center to allow for some wiggle room.

As always, test the mechanism to ensure that it is working properly. To make the wires not come unraveled, loop them tightly to the popsicle sticks and use hot glue to keep the windings secure.

In programming the beak, it will be important to properly set the boundaries for this servo for the open and closed positions. Doing so will ensure that we are not going to cause any accidental damage on the front face.
We really appreciate your efforts on this project . I assure you that we will give it our best to become one of your first prototyes. When our Robotbrrd is complete we will post up what we have. As an instructor and teacher at Eaglesnest Robotics Learning Academy, I am proud that this activity will be entered into our curriculum and used to teach many of our students how to program and construct a robot. Thank you for your efforts. Our Vote is in.<br><br><br>Sean Lewis<br>Eaglesnest Robotics<br>www.eaglesnestrobotics.com<br>&quot;Exploring Young minds through Science and Technology.&quot;
Thanks so much Sean! It's always a pleasure seeing NEON NOODLE's robots on the Robot Party. :)
<p>BRAVOOOO... Very Well...</p>
<p>Impressive :-)</p>
Our best end goal should be competent to produce RoboBrrds along with band together through educational facilities to make RoboBrrds towards scholars because Build it yourself solutions them to put together, and utilize as the program. It is extremely helpful, as the scholars have a exceptional hitting the ground with their very own RoboBrrd considering that /they/ build it and therefore are capable of make it better. These are understading about several subject areas aided by the their production. It is just a marvelous expertise <a href="http://rate-my-professors.com/" rel="nofollow">http://www.rate-my-professors.com/</a> .
Hi ! I really love your project. I'm trying to make a Robobrrd but it's not easy to find the different parts in France. Could you give me more details about them ( references for the electronics and circuits). Thanks a lot!! And once again : BRAVO !
Whoa. My kids would love making this. Thanks!
Awesome project. I am a teacher at an elementary school and this has given me some great ideas for lesson plans.
There's a problem with two of the images for the bottom face. The thumbnails are present, but when you click on them, they are &quot;not found&quot;. The missing images contain the dimensions for the bottom face.
Heya!<br><br>Just uploaded all of the design files to GitHub. There are pdf versions available too, so you can download the entire repository as a zip and get all of the dimensions. :D<br><br>https://github.com/RobotGrrl/RoboBrrd-Design-Files<br><br>Hope that helps!
Yes, this is a known issue. Since this was an entrant into the laser cutter contest, the rules don't allow us to edit the Instructable. :/ We'll update it as soon as we can!<br><br>The weird part is that the image itself was uploaded fine, and worked fine for a few hours afterwards. Something strange must have happened on their server.<br><br>There will be more CAD images uploaded soon as well, I'll reply back with more details :)<br><br>Thanks for the comment!
Beautifully done. Inspiring young mind will benefit much. You're motivating them into a better future. ○☺○
Thanks so much Evelyn and alfiefalf!
I'm Doing my best to draw some good attention to the instructables site, I think maybe giving my family and friends the link to your page for RoboBrrd might help just a bit...<br><br>N2TOH<br><br>Pst, ... Laser cutters are cool, pass it on....
Thanks N2! Every bit helped, I'm sure. :)
What a wonderful project- thank you so much for sharing! I've been working on a robot project with my three boys and this has given me some great ideas. :)
Thanks Honus! Congrats on being a finalist in the laser cutter contest.
Your instructable is very detailed, but I think this step is not easy for beginners to follow. The schematic with the 2 protection diodes is on page 10 in the datasheet, not page 9 and it is difficult for beginners to see how the parts are connected, if they are not used to read datasheets, e.g. the right polarity of electrolytic capacitors and the connection of the LM317. It is not the circuit you are using, but I think this a good example how it could look like: http://laserpointerforums.com/attachments/f42/31562d1298103794-diy-homemade-laser-diode-driver-31410d1297294173-logical-way-setup-2x-lm317-driver-lm317.jpg
Off by one error on the page number, apologies!<br><br>There were additional pictures of a breadboard as well that help with the wiring.<br><br>I'll revisit this step and post some step-by-step soldering pictures for this on some perfboard, this should help! Plus, perhaps a drawing of it in Fritzing or the like.<br><br>Thanks for your feedback!
RoboBrrd &lt;3
So cute and it hula hoops!<br><br>This is a very thorough instructables and a very interesting project to introduce younger children to robotics and programming. I love the concept and the idea that you used simple everyday materials for the construction was ingenious!<br><br>I hope you get the funding you need to create your kits, I know I will certainly buy two. One for me and one for my sister who is applying for teaching jobs in elementary and high school for technology! She loves these types of things to show the students. She tutors a young girl now and showed her how to make a vibrobot using a toothbrush. <br><br>Good Luck! Wonderful instructable!
Put us down for at least 5 to start with.
Thanks sailormoon (your username brings back memories hahaha)!<br><br>Hopefully that young student will keep interested in robotics and make cool robots too. :)<br>
Such great creativity and accessibility, awesome!<br />
Thanks a bunch mikeasaurus! I love your halloween cheese burgers! Hahaha so cool. :)
This is incredibly thorough documentation.
Thanks James! Lookin' forward to seeing your 3d printer on the Robot Party this week! :)

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Bio: Maker of RoboBrrd!
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