My B9 Robot


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My project is a full size replica of the lost in space robot. My brother and I are working on it together. It will be entirely scratch built. As you can see, it is a long way from being finished. Since it has no moving parts yet, I have yet to use the EZ-B with it, but I have tested some motors, and controllers outside of it. I think that it will work well.

A while back, I posted a link to this site on the B9 Builders site. It seems that several of them have since incorporated the EZ-B into their robots, so I am confident that it will work for me.

Rgordon asked me how I was making him bend at the waist. I am including a picture of the mechanism that I am working on right now. It might be hard to figure out just looking at the pictures, but there was no way to describe it without something to look at. Basically I have three door hinges on each side bolted together in a "W" fashion. I replaced the center hinge pins with longer bolts, and put flat steel across them. As the steel moves in one direction or the other, one set of hinges opens up, and the opposite end collapses. The diagonals keep the top above the bottom. It is powered from underneath by a motor salvaged from a cordless drill. The threaded rod goes through a larger rod that has been drilled and tapped. My original plan was to have the motor in the middle of the setup, but it would not fit; hence the extra linkage coming through the bottom.

We began with the goal of building a recognizable replica of the B9, and had hopes for animating it as best as we could. Not knowing anything about robotics, I have spent the last few years searching the web and trying to learn what I could. Stumbling upon this site was a real stroke of luck. I feel very positive that this will come out far better than I had imagined.
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"Very nice. I am jealous yours is so big and mine is so small...."

Something a man should never say Brett ... sorry, just couldn't resist:)
WOw thanks man flashing LEDS such a good idea
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Mines prety BIG too LOL ! Sorry could not resist!Hey how do you get your personal pic on here I tried and nothing !
Has any one tried the new arm and do you have a vid of it let me know. Think it would work for the b9 robot ?
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I think that those are too small. I have started on an arm mechanism for mine, Chris. I will try to get some pictures posted. I will be using DC motors, and try to figure out how to use potentiometers to regulate them through the EZ-B.
Cool Please do I might try heavy duty servos not quite sure how to go abou tit but PLEASE let me know:D
Hi Chris & Danger,

I'm also building a full size B9. I've actually got 2 EZ-B's in my robot. One under the radar in his upper torso and the other in the hip section below the donut. This keeps the wires to just power between the two sections.

I just finished getting the hip section working so he will bend over. I'm useing a Dewert motor and controlling the rotation start and end points with a potentiometer attached the end of the motor shaft. The three power connection lugs of the pot are attached to an ADC port on the EZ-B and a script in ARC is controlling it. ALSO, I learned real fast to add limit switches to each end of the rotation. These kill the power just in case the pot or EZ-B fails. I did have a problem and it was ugly. Now with the limit switches I can rest easy. If you dont know how to build them I'll be happy to help with advice. They are very easy to build.

I've got a script that works for my setup. I'll be heppy to post it and some pictures if you are interested. I did have to modify DJ's Motor & Potentiometer Script example in ARC to get my setup to work properly. For some reason the motor just shot past the $adcSpecified value sent to the main script by the call script. Maybe it's the pot I'm using. Anyway the value returned by the ADC port seemed to lag and the motor would not stop when it got to the value it was looking for. This line controls the stop command:

if ($adcCurrent = $adcSpecified)

I had to change the = in the above syntax to either a > or < depending on the direction it was going.

I also had to split the script into two commands. One to lower the hips and one to have him stand up. If your interested I have the project uploaded to EZ-Cloud as B9 Robot Control here:

Have fun!
David Schulpius
Thank you David. I downloaded the EZ file. That will be a big help in getting me started. Unfortunately, I am still a long way from programming anything. I don't have to tell you that the build itself is quite an undertaking. I am not buying any club parts. My brother and I decided to build completely from scratch. It will not come out perfect, but that is a challenge that we have decided to take.
I think that I am all set with the limiting switched. In the section to bend the waist, I just bought some "normally closed" buttons. I mounted them so that when it reaches the point that I do not want it to go past, on either side; it pushes one of them open. They are small switches. They interrupt the relay triggers, not the motors themselves.
I understand what you said about changing the script to ">" or "<" instead of "=". I wonder if the parts are just too heavy and the momentum pulls them past the desired position. Who knows? If the script that you wrote works, then it doesn't really matter.
Well, now that the cooler weather is here, maybe I'll be less tempted by outdoor activities, and spend more weekends in the cellar working on the robot. Hopefully I will get around to getting some parts moving and connecting them to EZ-B.
Like you, I decided to go with two separate EZ-Bs, one in each half. I did not want all kinds of wires running between the two.
Thanks again for the offer, and I will probably take you up on it looking for some guidance when I get to that point.

Blaise Sullivan
Hi Danger,

yes, building this B9 is a huge task. I couldn't imagine building from scratch. I just don't have the proper equipment to make the more detailed parts. My hat is off to you.

I really don't know why the swing moves past the stop value in the script if I use thie =. Watching the voltage in the Vareable window i can see it moves a little slow. It would be nice if I could use tbe = so I could get the motor to stop at a more exact point. Now i need to rellay on the limit switches to stop it close to where I want.

Have fun,
Dave Schulpius
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A side by side comparison.
United Kingdom
WOW guys

Good work on your robots.

B9 sure is a popular fellow . Good luck to you all on the huge task set yourself's.

Looking great Danger! Your scratch bild is very close to the real one. My hat is off to you. I dont have it in me to do all that work. I got my Torso and most of the outside parts already made. I did however have to do all the finish work like assembly, sanding and painting. Also, most everything inside is my work. Even at that it's been a ton of work and huge learning curve. Your work is much more than I was willing to take on. If I did I dont think I could have made it look even close to how nice your's looks. Again, Well done!
Mr. Chris,

I was just wondering how much this is going to cost you when you are through. I have seen them at $25,000 and quick sale for $12,000. Your is probably going to be a lot less, I guess. I am just curious if you have found a way for the common man (Not rich) to build one. If so, you could write a do-it yourself B-9 book with matching DVD set. There are a lot of people out there that are salivating for one of those (like me) B-9 robots. It is probably too late for me because when I bought my QboEVOpro, I agreed with my wife no more major robot stuff. But there are still many others out there.
I've read stories of B9Builder club members building nice looking B9's for under 800.00 USD. Of course depending on what all you want it to do, the cost can skyrocket.
The cost is still climbing. I'm not really sure but I must have close to 8k USD into it so far. That's a lot of cash but still less than the ones that Mike Joyce sells at B9 Creations. Mine is a lot like his but EZB has given mine more of the personality and action of the original TV B9.

I have most of the more expensive stuff already bought and installed. I still have to build bubble and brain but have all parts for that. The biggest expense and challenge remaining are the design and installation of the arms. I want them to at least move in and out and the claws to open and close. Not sure yet if I can get them to move up and down. That would be so cool if I could pull that off.
Thank you Dave and Steve for the compliments. Dave, I have to say that I am in awe when I see the pictures of your robot. Even though you bought many of the parts, there is a tremendous amount of work that you have put in. The parts that you put inside rival any professional robots that are out there I am sure. Mine is going to end up filled with car parts, bicycle parts, plumbing supplies, and probably a whole lot of duct tape. But that's not necessarily a bad thing.

Movie Maker, I am not sure if your questions were directed at me. You wrote "Chris" he also has posted pictures of his B9 here. I'll answer anyway. I have not kept track of what I have spent. I would guess that I have close to a thousand into it, but that includes a lot of waste and tools that I bought. Some examples of waste would be... I bought a case of four gallons of fiberglass resin. I only needed two. I wasted a lot of Bondo learning how much hardener to add and what size batches to mix up; that sort of thing.

I spent two hundred on a used electric wheelchair. I also have bought fifteen windshield wiper motors, and a ton of electronics. If you just wanted to build a life size model without too many working parts, you could do it without breaking the bank. I have been stockpiling things over several years. On weeks when I have done a lot of overtime, I have ordered things and then put them aside. I have a middle class job myself. I will not be spending tens of thousands on it, I assure you.

I have saved a lot of money by building the torso from scratch. My "neon" is made with acrylic tubing, and amber, tractor trailer, LEDs behind them. I am working on a scratch built bubble. It is a lot of work, but I do not have the money to buy everything. Also, my brother and I decided early on that we wanted to build it ourselves. In the early days of the B9 club, they all were built that way. I don't criticize anyone for buying parts. It is just not the route that we want to take.

If you are interested in how I built the torso, I documented the entire process here
. The page is a little confusing. The webmaster puts the updates on the top. Scroll down until you see the "Stop" sign and start there (perhaps a little ironic). When you get to the bottom, jump to the top to finish.

Perhaps some day your wife will come around. Maybe when all the neighbors have robots doing chores around the house. Have DJ talk to her. He's a good salesman.

Good Luck!
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All these years later, one broken back, months of recovery, a year and a half of physical therapy, several job changes, and back to work on the fun stuff.
Welcome back Danger! Missed you man. Your B9's bubble is shiner then yours! LOL.
Thanks Dave. My brother has been posting on the Facebook page. I haven't gotten around to joining Facebook. I have too many issues with their policies.