Posts Tagged ‘Dynamixel’

New Dynamixel MX Series Servos Pack a Powerful Punch

Friday, July 13th, 2012


Robotis wowed the robotics community with the MX-28T, and recently they’ve expanded the MX line to include the TTL MX-64T and the MX-106T, as well as the RS-485 variants, the MX-28R, the MX-64R and the MX-106R.

These new servos have a contactless magnetic encoder, which offers 4x the resolution of the RX series. This makes them more accurate and even smoother than the old servos. Also upgraded, is the processor in each of these servos – a 32bit 72mhz Cortex M3! This beefy processor handles the newly implemented PID control algorithm. It can be used to maintain shaft position and can be adjusted individually for each servo, allowing you to control the speed and strength of the motor’s response. The new setup also offerers a 3Mbps bus. The ‘T’ variants use TTL communication and are compatible with other TTL servos like the AX-12 and the AX-18. Meanwhile the ‘R’ variants use RS-485, just like the RX series.

You might remember Don and Jason’s new robotic arm, which uses the new MX servos. But the real question is, what will you do with them?

AX-12 Robot Arm & Arbotix Demo

Thursday, August 25th, 2011

Banter, robots, video. Go!

Dynamixel Positional Feedback Demo

Monday, August 22nd, 2011

This video does nothing to dispel my friends’ belief that all I do is sit around and play with robots all day at work.

– Andrew – “Robot Whisperer”

Cross Dressing Robots!

Thursday, August 18th, 2011

Our old friend Che is a bit special. He has pet ducks, snakes, really ugly dogs, and a really hot wife. He wears his mom’s leather pants. He’s also into robo-masochism: meaning he lets his paintball-equipped robots shoot the crap out of him, all the while filming it for the internet’s enjoyment. We have weird friends.

He also has a great custom humanoid project that he has shared with the TRC, Hi No Hikari. This rather large humanoid robot is a kung-fu competitor and Mech-Warfare veteran. “It” also wears dresses, kimonos, and sometimes has flowers tucked into it’s mechanics. I don’t know, don’t ask me. We’re fully supportive of alternative robot lifestyles, but sometimes it’s better that we just not ask. Giger did not appreciate the dress at last year’s Mech-Warfare. He muttered something about “damn hippies” and proceeded to shoot Hi No Hikari in his/her flowery face.

With all that said, it’s been a great learning experience for Che, and one that he has shared with us every step of the way. This was his first attempt at a PLM design and he started off using AX-12+’s, eventually upgrading to the more powerful RX-28s.

Seeing this project progress from Hi No Hikari’s first steps to what he’s achieved now has been great! Check out his latest progress in the video below, we can’t wait to see even more come from this project!

RX-Bridge Enables DX/RX/EX Series Dynamixels on ArbotiX

Tuesday, April 6th, 2010

ArbotiX RX Bridge

Now available!

The ArbotiX RX-Bridge expands the capabilities of the ArbotiX Robotcontroller by enabling the use of DX-117, RX-28, RX-64, and EX-106+ Dynamixel Servos. This add-on board converts your existing ArbotiX Robocontroller TTL serial ports into an RS-485 serial protocol compliant port.

The RX-Bridge answers the call for a high end, fully programmable controller for the higher end range of Dynamixels at a much lower pricepoint than other less-capable controllers on the market.

RXBridge-on-arbotix

Giger v2.0 – Initial Walking Gait Progress

Tuesday, March 2nd, 2010

New upgrades! Giger now uses 10x EX-106+, 6x RX-64s, and 8x RX-28s for a total of 24 DOF.


Giger’s upgrades got finalized late Sunday night and I had a bit of time to sit down and start to work on the walking gaits (from scratch). The EX-106+ is roughly 4x more precise than all previous Dynamixels, so the positional values do not translate over well when upgrading from a previous model. What does that mean? It was far simpler to just start over rather than try to scale the values step by step. All new custom brackets used in the legs and feet, as well as new elbow/shoulder brackets and arm extensions. Brackets were designed in Autodesk Inventor 2008 and machined by Rapid Sheet Metal. It’s worth mentioning that all of the custom, as well as the stock, brackets and frames that are used in Giger’s arms and legs are available in our store on our Dynamixel Servo & Bracket page! Even his ankles/hip joints or his entire legs!

A lot of projects tend to only show updates after many dozens and/or hundreds of hours of progress, but I like to show the little steps as I feel it gives one a better view of the evolution of a project and what goes into making a robot work. Keep in mind; I have this gait tuned to a very slow rate so that I can work on the balance and COG shifting correctly, it can then be sped up to a more realistic, useful speed. Here’s a short video of my initial walking gait progress (about 2 hours of programming work so far) on Giger 2.0:

Giger: Humanoid Robot Overview

Wednesday, February 24th, 2010

I’ve been busy at work with Giger installing some upgrades before Robogames (in the tune of 10x EX-106+ actuators, as well as brand new machined brackets from Rapid Sheet Metal). That said, we decided to use some of the random footage we had taken of Giger to give an overview of the robot in it’s first revision, when it only had RX-64s powering its legs. We’ll have a lot more information, pictures, and video on Giger v2.0 in the near future!

BTW- If anyone is looking for a solid place to get some sheet metal cut/bent or some parts machined, check out Rapid Sheet Metal and their sister company Rapid Machining. I’ll give a bit more in-depth review of them in the followup post where we’ll talk more about Giger 2.0, but I was absolutely blown away by their quality and customer service, so I’ll say it here as well. Check em out! Tell em we sent ya! =)

Brackets and Dynamixels and Bioloids Oh My!

Friday, February 12th, 2010

We’ve been a bit quiet around here lately, mostly because we have our heads buried and are hard at work at bringing you guys some awesome new robotics products and kits! Wanted to take some time to showcase a new reworked section of our site that helps builders like you build your robots easier. Our Robot Servos & Brackets section has been completely revamped, pairing up the servos with compatible brackets and frames (tons of new varieties have been added, as well as more to come).

The Robotis Dynamixel Servos section should be of particular intrest, as we now stock individual Bioloid Frames as well as every type of DX/RX/EX Series Brackets and Frames.

Even our Hobby Servos section got a revamp, now offering Micro, Standard, and Giant Scale PWM Hobby Servos and compatible brackets!

We also started rounding up some cool user projects to demonstrate what can be done with these awesome actuators, which can be found on various related product pages. Here are a few examples!

Luckily, Sarah Conner hasn’t shown up yet

Monday, January 26th, 2009

But we’re preparing for when she shows up to blow us away, because this might very well be the start of Skynet.

Robot pr0n warning. (Click for a larger picture)

Well, at least nobody can accuse us of under-engineering. Yup, that’s a pyramid of RX-64s. This is a teaser photo of a new project brewing in the Trossen Robotics Lab for the upcoming Mech Warfare competition. A fully custom aluminum frame and bracket system is being machined courtesy of Big Blue Saw, our sponsor on the project. Did we mention we’re giving it weapons? /snicker