Master-slave suit for KHR-1HV

[rodmanLT]

Hi all,

I was so inspired by King Kizer humanoid and his master-slave control that I decided to build my own master-slave suit.
I bought a dozen of big fat potentiometers (soviet military technology from 1960's).
I put a lot of effort into mechanical design- it wasn't easy to make the suit comfortable. Now suit consists of three joints and here is the video:
http://www.youtube.com/watch?v=MpPI011xwZI



After some testing I will make another side to complete upper body control.
If I'm lucky enough, I will make same for the legs and torso. Maybe..

[Orac]

Wow, looks great, very fast response.

Don't forget to take it off before heading to the loo though

[Dave]

WHOA!, Ok thats pretty cool. As Orac said super fast repsonse time. im well impressed.
How on earth did you get that working?

Awesome!

[mkegruber]

Hi,

Could u post photos of the controller itself.

regards
Michael

[limor]

Please some technical details!

[rodmanLT]

Hi all,

sorry for the delay, I was very busy...
Here is the last video:
http://www.youtube.com/watch?v=WCTvggKuPvU


Controller is AVR mega8 with inverter uC for inverted Kondo uart.
Potentiometers were bought from ebay, single turn, 10kohm.
I can post entire program in bascom later.

You can find some photos of the board and joints here:
http://blog.elektronika.lt/robotai/humanoidas/

Response is very good with 2 joints, but when I add 4 more, robot starts to lag. I think it's because of bandwith limitation. I send same commands like you move single servo sliders in HTH3.
Command looks like this in hex: 0D FE 00 01 01 40 1E 5E
0D is "start" . after this RCB3 sends me back 0D if ready.
FE is "command"
00 is "option"
01 is "channel"
01 is "speed"
40 is "position high byte"
1E is "position low byte"
5E is "checksum"

checksum is (FE+00+01+01+40+1E)AND FF

Here is the program for one axis (BascomAVR compiler):
Axis(4) = Getadc(3)
I = 4
Position(i) = Axis(i) - Offset(i)
If Position(i) < 0 Then Position(i) = 1
Position(i) = 16384 - Position(i)
Pos_h(i) = High(position(i))
Pos_l(i) = Low(position(i))
Temp = &HFE + Channel(i)
Temp = Temp + Speed
Temp = Temp + Pos_h(i)
Temp = Temp + Pos_l(i)
Temp = Temp And &HFF
Sum = Temp
Printbin #1 , &H0D
Inputbin #1 , Ready
Printbin #1 , Command ; Opt ; Channel(i) ; 1 ; Speed ; Pos_h(i) ; 1 ; Pos_l(i) ; 1 ; Sum

Channel(i) ; 1 means send 1 byte from array starting at index i.
Pos_h(i) ; 1 is the same

Offsets are used to put robot's joints always to the same starting position. With the suit on, you stand still and press the "calibrate" button. This moves robot to home position and sets "virtual" zero position for all potentiometers.

[silveranim]

...it looks cool...

it´s possible for you to capture your moves??
and play it again..?

thanks

[rodmanLT]

Motion capturing is not a problem at all. Instead of sending all servo positions straight after capturing potentiometers values, we need just to memorize positions in the eeprom (for example) or somewhere else. Later on we can playback this sequence on request. I don't see any problems here.

By the way, i have managed to get rid of robot's terrible lag. Mr Fuminori Yamasaki from IXS Research Corp adviced me to use another command. Now robot responds very quickly:

[Robo1]

Looks really good.

I'm impressed by how fast the robot responds to your movement. good work. Have you any plans to get this working on the legs.

Bren

[rodmanLT]

Yes, I will try to make full body suit.

[silveranim]

..sounds good, with capturing...

i will get on friday, this week, my kondo KHR-3hv...with all the 22 DOF...
and i would like to use my "PEAVY 1600x" midi slider board, to control the robot...í´am just using this slider board for computer animation...

i think the way is nearly the same, like your good work...

but i´am not shure if it works....Heart2Heart 4.0 with midi and capturing...

maybe, do you have a good idea!!??

[veltrop]

[rodmanLT]

I'm using command
SETUP OF THE SPEED OF MOVEMENT
which is second command on page 20 of the RCB3 Command Reference
(I forgot the link to this document, hope you will find it)

[veltrop]

Found it, thanks!

[limor]

Engadget has come across this thread.
Love their sense of humor