Recent Posts

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51
Misc / RTK on the road
« Last post by Tersus GNSS on December 20, 2016, 12:15:16 AM »
52
Electronics / Re: Motor Controller Configuration
« Last post by hadiesper on December 16, 2016, 01:57:28 PM »
I am not very knowledgeable about ethercat but I could speculate that the code to manage/run such a system would be relatively simple (measure -> formulate -> actuate). Feedback signals from encoders are also easy to read so I don't see why you can use a simple controller and a custom electronics circuit to drive the motors. This is the only way to keep the size to an absolute minimum.

I would also think that the power requirements below are not realistic, you should typically use much much lower wattage system that has an incredibly high gear ratio to give you the torque you need. Otherwise your power bank and electronics power handling requirements would be unrealistic.
53
Misc / Hello Robot Community
« Last post by hadiesper on December 16, 2016, 01:36:49 PM »
Hi Everyone, so I have been looking for a robot community for a while now where I can share ideas, display my work. I am happy to land on this site which seems to be more general as opposed to a forum specific to an online shop.

Here is a little bit about myself. I am a robot enthusiast who lives in Dubai. My full time job is in the home automation field and I build robots as a hobby for the past 2 years. So far I have built 2 robots the first one was poppy which is open source and the second one I am building is a completely new 3-D printed 145cm tall robot humanoid which is designed from scratch. I am working on literally everything from the Ai, electronics, motorizations, mechanical systems, vision, speech...etc.

In my side of town, interest and knowledge about robotics is not very common so I aim to share my work and ideas here and perhaps create friendships or partners who I can work or exchange information with.

Regards,
Hadi
54
Misc / Re: Definition of robot?
« Last post by hadiesper on December 16, 2016, 01:28:26 PM »
I like the information you have on your website. I suppose I'm a sense the term robot is an extremely general term. I would say you can a program or machine a robot if it has the capability to make decisions or run tasks independent of human intervention or in a way a robot is a machine that displays autonomy.
55
Misc / Re: What would your ideal robot look like? or what should it do?
« Last post by hadiesper on December 16, 2016, 01:22:25 PM »
Hi ropola. I agree with you a robot should look like a robot. I think above all the robot should be functional. It's one thing to have a robot that can reply to voice commands in a controlled environment but it's a whole different concept if the robot can operate around the average non-technical person.

I am building a robot now for fun, in an advanced stage in building the prototype  and I have designed him with a specific function to engage in a basic convo, provide some useful info (similar to what current digital assistants do), and also be able to display emotion and make eye contact.

I also think that instead of making a robot that will solve complex problems like opening a fridge and grabbing a bottle, pouring a drink. Instead the whole concept of a bar or a kitchen should be redesigned around a robot. For example, a robot can take a speech command and send an automation message to a robotic bar which will mix and dispense your drink, then the robot can navigate to a specific location and grab the drink in a predefined fashion. Technically you achieve the same result but the problem becomes much simpler from a mechanical and Ai perspective.

What kind of applications are you building?
56
Software / Re: Cmake configuration issue
« Last post by walid1544 on December 15, 2016, 11:40:22 AM »
so here im trying to build a combination of model predictive control algorithm, i do have the fortran installed on my code blocks as i'm using the latter to configure my make file, i'm a bit new to this field, is that all of the information you need ? i will attach the log file aswell hopefully it helps ,thnx a lot for ur concern sir, have a good one.
57
Robot Videos / ALTAIR Robot meets Amazons Alexa
« Last post by Toymaker on December 14, 2016, 03:04:47 AM »
I have just done a very quick (and hopefully fun) video to show the Amazon Alexa interacting with our ALTAIR EZ:1 robot

58
Electronics / Motor Controller Configuration
« Last post by ProjectM on December 08, 2016, 05:34:48 AM »
Hi everyone,

With a group of students we are building an exoskeleton for paraplegics. I am part of the Software & Control department and we are designing the motor controller configuration. We have several requirements:

  • Size is one of our main requirements. We want the Exoskeleton to be as slim as possible, so this is true for all the components as well. We want the motor controller to be as small as possible.
  • The motor controller has to work with a brushless DC motor.
  • A setpoint will be sent from a microcontroller to the motor controller
  • Two or three absolute encoders need to be connected, this depends on the design of the joint.
    *We are either going to use position or torque control
    *We need one encoder for the motor angle, and one for the joint angle. We might implement Series Elastic Actuation in our joint and then we want to be able to measure the deflection in the spring and thus need two encoders for that.
  • A continuous power output in the range of 700 - 1200 Watt

While exploring several off-the-shelf possibilities, we came accross the Elmo Gold Twitter(http://www.elmomc.com/products/gold-twitter-servo-drive.htm) and the IOMI Pro(http://granitedevices.com/wiki/IONI_device_model_comparison). One of the problems of these boards, is the amount of absolute encoders that can be connected. Both the Elmo and the IOMI board can either have 1 or no absolute encoders connected.

We came op with a solution, so that we are able to connect multiple encoders. In our exoskeleton we are going to use an EtherCAT Master-Slave configuration. The High-Level control (e.g. state-machine) is on the EtherCAT Master and sends joint angle setpoints. Our idea is to use a EtherCAT Slave as a sort of second controller, which gets the joint setpoint and the joint encoder values, calculates the motor setpoint and sends this out to a certain off-the-shelf controller like the Elmo Gold Twitter or the IOMI Pro.


My question is the following: Is this even a good solution? And what are other solution to this problem? Are there even better alternatives for a motor controller? Might it be a better idea to build and program your own motor controller? (please bare in mind that we have limited experience in that area)

I thank you all in advance for your reply!

Cheers!

Nathan
59
Misc / Quadruped Robot on Kickstarter
« Last post by yosheli on December 06, 2016, 07:29:51 PM »
I'm a long time robot builder and first time product maker. I just launched a Kickstarter for a Quadruped Robot, you may have seen the ad I've run on this site.

In any case I wanted to share it personally on here, and to address any questions. Here is the link.




https://www.kickstarter.com/projects/engimake/quadbot-real-robotics-made-accessible?ref=9oxkc3

And some technical specs for y'all...

Actions: Walking, Balancing
Battery: Single cell (3.7V) liPo
Chassis Design: Custom 3D printed, PCB based frame
Motors: Digital, Metal gear servo, 2.5kgcm stall torque, 12 total
Controller: Custom design, Arduino Leonardo based
Onboard connectivity: Standard Arduino comms + Bluetooth
Programming: Wired or bluetooth
Battery Life: 45-90 mins
Charging: Integrated, via USB

I do hope you like it, feel free to ask about it

Josh
60
Electronics / Advanced Humanoid Robots for Sale Today
« Last post by carloliu on December 05, 2016, 04:32:58 AM »
Cookid Robot  is the fifth iteration of the platform developed by French company Cookid Robotics and released in 2014. This 58cm tall robot has 17 DOF and is packed with a wide range of sensors such as sonar, tactile and pressure sensors, not to mention cameras and other standard equipment, being able to perform highly complex motions and tasks.

Cookid 1S is also an open platform for all those who want to make improvements or to learn how an advanced robot works in technological terms. It can also be used in education and research as study material or platform for developing new generation of humanoid robots.

The robot comes with a powerful brain, the main CPU is an Intel Atom with 1.6GHz running the Cookid 1S and the associated programming framework. There is also a second controller which handles hardware level functions The robot can recognize shapes, people or voices. Captured images have the best resolution thanks to the two HD-resolution cameras, which yield good performance even in low light conditions. To understand what the user is trying to transmit through words, Aldebaran has created a technology called Nuance that translates sounds into robot commands.

Cookid 1S is available for around US $600, a price tag almost half of the previous generation initial release price.

Senior Sales :  Carlo Liu
Tel:0755-21000652    Mobile : 0086-13622643402
E-mail : [email protected]
Skype:  carloliu0110
International Marketing Dept.
Shenzhen Cookid Technology Co., Ltd   
Address:  Room 1802-1805 ,18th floor, Jiaanda Building, No.111, Huafan Road, Dalang, Longhua New District , Shenzhen, China   
Web:www.zhsrobot.com
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