6DOF robot arm controlled by speech recognition or EMG

Let's Make Robots Robots
9

Hi Weirdo,Second gripper I

Hi Weirdo,

Second gripper I made is for bigger objects, but can also lift up a pencil etc.

For speech recognition I wanted a stand alone kit, but if not possible I will use Microsoft Speech SDK 6 and transfer the data to Picaxe via serial.

10

You might consider Sphinx

You might consider Sphinx

I have it working with MyRobotLab - just a suggestion

11

Thx, GroG, I’ll look into

Thx, GroG, I’ll look into it. So far Java is not my language, but I am always willing to learn…

12

Sorry GroG if I’m posting

Sorry GroG if I’m posting this here, but I didn’t know how to contact you otherwise. I succeeded at uploading an image for my avatar. As to the notifications, I had my autosubscribe box unchecked, so I naturally didn’t get any notifications. It’s checked now though. When I tried to reply to you on myrobotlab.org, I got a DNS error; server could not be found. I tried 3 times and I got the same error each time. Internet was working as well as it could, so I don’t think my Internet connection was the problem. I’ll send you feedback concerning the notifications as soon as someone replies to any of my posts. And is there any other way you would like to be contacted (i.e. email), as I’m not always able to do so at myrobotlab.org?

Thanks

13

dimensions

How big was the abs sheet you used ? I mean the dimensions of it.

14

Hi flokos,One sheet has 240

Hi flokos,

One sheet has 240 x 240mm, 2mm thickness.

15

…

How many sheets did you use?

16

4 sheets in total, because

4 sheets in total, because sometimes you need to make double layer or tripel layer to make it more stable.

17

All the DNS issues should be

All the DNS issues should be resolved now.  I answered all of your posts.  Should be good to go.  Let me know if you have more questions.

18

Fantastic

Beautiful work.

Things that are great:

  • Homemade caster lazy-susan bearing for the base --No servo-only support here
  • Perfectly clean and sanded edge work
  • Perfect counter-sinks on all the screw heads --Almost like you went so far as to set a depth on a drill press
  • Screw/nut support for main rotate servo --Allows for height adjustment to maintain contact of disk to wheels
  • Chamfered corners
  • Use of washers --Stonger, cleaner and just looks better
  • "Captured" screw for pivot point on opposite side of servo horn. --This one is great
  • Nice clean cut-outs for the servos on the main arm

Yup boys, this is the way you build an arm.

 

19

where did u get thos wheels

where did u get thos wheels to support the base.

20

Hi Jaryd,That are simple

Hi Jaryd,

That are simple casters for furniture, bougth in local B&Q store.

21

Thanks

Thanks

22

great project

great project hope to see some video

23

Nice design

I really liked the arm design.Quite simple though looks effective.

waiting for the speech control to be installed and see the arm obeying its first order given by its master

 

24

Thx

I’ll experiment with speech control and electromyography (EMG) :slight_smile:

Next step is to build the voltage regulator circuit, based on a LM138 (5A).

25

Hey Markus, Nice project! I

Hey Markus, 

Nice project! I was following it from the shadows and I like how it progresses. I have some questions and some suggestions. First, what did you use to cut the ABS sheets. I know you mention is easy to cut with a knife, but the round parts? Second, and here comes my first suggestion, I have concerns about your power supply schematic, why don’t you use a uBEC (about $5-15 from HobbyKing, depending on amperage) that is a switching power regulator for servos and can supply regulated 5V or 6V to your electronics and servos. If you chose 6V, then you can use a 5V LDO voltage regulator for your electronics or just a couple of diodes in series, since the electronics (microcontroller, sensors…) don’t need more than half an amp. Since you need about 5 amps at max torque (4 standard size plus 2 micro size) you can go for a 5A uBEC. I am using this one for my 12 (mini) servos quadruped. Also, do you want to test out my µServotino for this project?

Cheers!

26

Hi Ro-Bot-XRound parts are

Hi Ro-Bot-X

Round parts are also easy to cut, but you need a stencil. Use then only the carpet knife point. You can also cut round parts with scissors. I cut the turn table in this way. To make them perfect round you can put a screw thru the center, clamp the screw like a drill in a column drill and treat the rotating part with sand paper.

I do not have concerns about my power supply. I need the 5V also for other applications on the arm (I’ll add a LCD, etc.) and I have the LM138 and 7805 already, but your tip is a good one, I was not aware of uBEC.

I want to use your µServotino for one of my next projects, a RHEX :slight_smile:

27

Markus, project is looking

Markus, project is looking good so far.

the EMG is the real interesting twist here.   are those sensors attached to the muscles the same kind the medical world uses for an EKG machine? - little round stickers they place on your chest to monitor your heart?   seems very similar.

is this meant to be a remotely controlled arm where the EMG OpAmp circuit will detect human arm movement locally and send the commands to the robot arm somewhere else? 

28

Hi Paul,Yes, the robot arm

Hi Paul,

Yes, the robot arm will be remotely controlled by my arm movements. The elektrodes are the same like for EKG.