Pepakura Biped

While the Deathstar, and X-wing squadron might have failed to gain crowdfunding traction, there is a realistically obtainable piece of technology we can create today...the B1 Battle Droid.

 This droid functions similar to a Spring Flamingo design for the legs, upper body balances like a "hoverboard" at the hips. Remote control is done with a vr headset, and 360 degree live streaming camera. The user feels they are the robot. Autonomous mode is also an option.

Thingiverse contains item number 505758, a printable lifesize battle droid, scaled up 400% from a figurine model.

 Using the Instructable found at http://www.instructables.com/id/Life-Sized-Star-Wars-Battle-Droid/ we can create a pepakura variation of this droid.

The pieces of the instructable make up 218 pages of A4 cardstock that is cut and assembled to create a unique frame for advanced experimentation in robotics.

The parts catalog can also be upgraded to CNC milling for plastic injection molding. Limited edition runs, or mass production of this unit would then be possible (either as an officially licensed product, or a modified variant).

The challenge is to make this prop "do" anything useful.

An arduino board with H bridges control points of articulation on the robot, it is not a motionless statue.

The Droid is easy to redesign to avoid intellectual property right issues, but a functioning model of a well known droid is already branded, and therefore more marketable as an officially licensed product. This droid functions, even constructed from cardstock or PET plastics.

The weight is extremely important, and that's why I recommend cardstock lightly coated in vinyl, or lightweight PET plastics (think the plastic bottled water comes in).

For the electrical system we don't want to use more than 500mA at up to 36V to power motors, unless we redesign the circuit boards to handle more power, and that is using the H bridge method. Otherwise Arduino boards burn out above 5V at 500mA, so that's the range of power that we areally dealing with.  5-36 volts at 500mA for each point of articulation.  Try to keeping both weight and noise under control, so most of points of articulation will be done with small motors, walking and balancing will be done with larger motors and gyro sensors.

Bipedal walking robots are challenging to build, but this model is really not reproducing the Honda laboratory's work with Asimo.  This is a much more scaled back and conservative locomotion style, more similar to the walking style of a wind up walking toy. This is done with a combination of trigonometry and physics. The mass of the robot and the constant of gravitational force determines the rate at which the robot falls forward, and the foot needs to move at an upward angle to be in the location to catch it on the way down. This will involve some programming experimentation, so don't be surprised if everything doesn't come together just right on the  first attempt.

Original designs are often made from cardstock, though most are coated in resin, epoxy, and paint when finished.  However, this droid needs to be light weight, so perhaps finished in a light coating of vinyl 


 I have begun the construction of the pepakura variant of this project.

 The build requires 218 sheets of A4 cardstock, printed and cut.

 Currently I am assembling a first pair of arms.

 


The files for this robot frame can be found on Instructables

http://m.instructables.com/id/Life-Sized-Star-Wars-Battle-Droid/

 

Files for the 3d printed variant can be found on Thingiverse, item number 505758

http://www.thingiverse.com/thing:505758

  

 Pepakura Biped by dmahan26 is licensed under theCreative Commons - Attribution - Share Alikelicense.

This is an original creation based on designs from the movies. I, Ecogeeco, metaform3d, & Darth Raider retain no rights to the design which presumably belongs to LucasFilm and Disney.



This is a companion discussion topic for the original entry at https://community.robotshop.com/robots/show/pepakura-biped

cool good job

techset on youtube!

i like it looks like it was hard and will get harder

Thank you.

Subscribed

I would definitely recommend a ScanNCut to anybody who wishes to try this. Its a major labor saving device.

Cutting arms page 26/29

|x

right shoulder

|x

Right bicep

|x

I’ve added a GoFundMe

I need your help to get this project off the ground. Cutting 200+ pages of cardstock by hand is a daunting task. However it is necessary to create a prototype model. I am soliciting donations to procure a Brother ScanNCut2, an electronic die cutting machine.

Like a home printer, it plugs into your PC or Mac with a simple USB cable. However, instead of printing it uses a small blade to cut paper, cardstock, vinyl, fabric and more up to 12" wide and 10 feet long.

 

To show your support of this project, please visit GoFundMe .

 

https://www.gofundme.com/ddd4u2xw

 

Please consider making a donation today!

(No subject)

|x

cool augmented reality filters

how should a robot see the world? With cool augmented reality filters.

|x

Funding

Asking for funds to make a cardboard static model is quite dubious for three reasons:

1: You don’t own the rights of the battle droid so you can only make it for personal use.

2: Because you don’t own the rights, no one will benefit from you building this robot.

3: A cardboard model is no prototype, it’s a cardboard model! The method of motion you are refering to is an experimental MIT model to test gaits, it will never walk by itself because it’s not it’s purpose. Being able to reproduce the MIT model alone is a huge and very expensive task. Designing and building a full sized battled droid that is able to walk will cost millions of Dollars and it will take a highly skilled team years to build it. It’s cheaper to contact Honda and buy an Asimo robot.

Thank you for your input

I plan to use an arduino board with H bridges to control points of articulation on this robot, it will not be a motionless statue. The Droid is easy to redesign to avoid intellectual property right issues, I do think that a functioning model of a well known droid is already “branded”, and therefore more marketable as an officially licensed product, or even a cheap knock off version. This is a mockup, but will function, even if it is constructed from cardstock or PET plastics, instead of heavy aluminum constuction. I’m sorry that you feel so pessimistic about this project, but I’m not the first person to build a walking pair of robotic legs without having a multi-million dollar budget. In fact, several people on this website have done exactly that. I’m not sure how much an Asimo costs currently, but I have $20 worth of cardstock into this and it’s fully printed, and 29 sheets cut. These DC motors are $1 each.

I don’t expect that it will take long for me to teach a robot to walk.

We did some pretty cool halloween decorations using salvaged windshield wiper motors.  They were $10 each, and pretty powerful.  The weight is extremely important, and that’s why I recommend cardstock lightly coated in vinyl, or lightweight PET plastics (think the plastic bottled water comes in).

Meccano toy company makes a Meccanoid robot for around $400 that’s 4’ tall, and made of metal and plastics.  It’s locomotion style isn’t close to what I’m trying though.  I’m using a modified variation of Runbot for legs.  The weight factor is why I don’t believe InMoov will ever be able to walk, inspite of how impressive that project is otherwise.

My general understanding of the electrical system is that we don’t want to use more than 500mA at up to 36V to power motors, unless we redesign the circuit boards to handle more power, and that is using the H bridge method. Otherwise Arduino boards burn out above 5V at 500mA, so that’s the range of power that I am dealing with.  5-36 volts at 500mA for each point of articulation.  I’m trying to keep both weight and noise under control, so most of my points of articulation will be done with $1 motors, walking and the balancing though will be done with larger motors and the gyro sensors.

Bipedal walking is a challenge, but I’m not reproducing the Honda laboratory’s work with Asimo.  This is a much more scaled back and conservative locomotion style, more similar to the walking style of a wind up walking toy. You are right in thinking this is done with a combination of trigonometry and physics. The mass of the robot and the constant of gravitational force determines the rate at which the robot falls forward, and the foot needs to move at an upward angle to be in the location to catch it on the way down. This will involve some experimentation, and I will be surprised if I get everything right on the very first attempt. However, I don’t believe my plans reinvent the wheel, but rather are a conglomerate of several open source projects into one.  None of which are particularly easy, but I enjoy the challenge.

I do have the benefit of a degree in computer programming, prior experience of building a robot that functioned in either autonomous mode or by remote control (in only 6 weeks!), and professionally I operate a 5-axis industrial laser to cut prototypes and limited test run parts for manufacturing.

Original prototypes can definitely be made from cardboard, though most are coated in resin, epoxy, and paint when finished.  I plan to finish my droid in a light coating of vinyl

I’m curious about how you

I’m curious about how you will use these DC motors in the joints… are you going to make some gear boxes?

I wish you best of luck,

I wish you best of luck, this sounds like an interesting project.

Thank you.
It’s a fun hobby.

here’s a rough sketch

Once it is verified that these tiny motors cannot move the mass using direct drive, but it will be a rather primative one as illustrated below. The geared shaft will feed through a washer, and attached to a balsa wood disk. Hope the gears don’t slip, or I might use springs or bearings to secure them in position. I received a nice box of junker RC cars the other day, and the ones that don’t work will be stripped for gears and motors.

|x

I was actually more puzzled by how to pass wiring between the two sides, but it looks like through a hollow gear shaft.

shoulder, bicep, elbow, forearm

|x

Video: Test of direct drive

https://www.youtube.com/watch?v=R_zf_M-B7JU

uploaded video of geared motor

https://youtu.be/4udDBYlDY70

Now this is my idea of a good time!

|x

Folger Tech 2020 Prusa i3

|x