RoboSavvy Forum

Legs in neutral position

2006-03-05T19:52:09+01:00

Ah, much better. I had tweaked values to compenstae but it never seemed right. It's all good now.

Statistics: Posted by subpilot — Sun Mar 05, 2006 7:52 pm

Legs in neutral position

2006-03-05T10:43:22+01:00

Just checked mine and the values are the same as those Bauermech has posted.

Hope that helps

Pev

Statistics: Posted by Pev — Sun Mar 05, 2006 10:43 am

Legs in neutral position

2006-03-05T02:50:09+01:00

That's quite the bit of graphics you did there bauermech. Thanks.
Pev, does that match what you have?

I don't get the instructions. They say:

The left leg is assembled exactly the same as the right leg. Note the position of the numbers on the servo horns during assembly.

Clearly that can't be true, can it?

Statistics: Posted by subpilot — Sun Mar 05, 2006 2:50 am

Legs in neutral position

2006-03-05T01:14:41+01:00

Hmmm... this is what I've got...

The robot's left leg:
L1>2, L2>6, L3>4

Robot's right leg:
R1>8, R2>4, R3>6

Each of these indicates the top screw (as though he were standing upright) in refrence to the numbers on the servo horn disks

Here's what he looks like on his belly...

If this isn't what you're looking for, or still doesn't help, let me know. Do you have a picture of what the legs look like when you 'fold' them up together ...or at least as far as you can get them to fold?

Statistics: Posted by bauermech — Sun Mar 05, 2006 1:14 am

Legs in neutral position

2006-03-04T19:10:59+01:00

I don't get it and the drawing doesn't help. If you put your leg straight like this:

What index position is the top screw at on the three joints (I marked them as 1,2,3) on each leg. Right being the same as what you'd call your right leg.

I have R1=1, R2=4, R3=5 L1=1, L2=6, L3=5

Statistics: Posted by subpilot — Sat Mar 04, 2006 7:10 pm

Legs in neutral position

2006-03-04T03:22:54+01:00

oh crap... that didn't work so well.
it's:
knee/thigh (R-L):
__8__..__2__
_6_2_.._8_4_
__4__..__6__

knee/shin (R-L):
__4__..__6__
_2_6_.._4_8_
__8__..__2__

R and L are the robot's right and left
Confusing? It is to me now
Hope this helps

Statistics: Posted by bauermech — Sat Mar 04, 2006 3:22 am

Legs in neutral position

2006-03-04T03:15:10+01:00

Yeah, that is strange.... It's with both knees? Sounds like the servo-motors are backwards, switched, or something...
Likewise, without seeing it, it's a shot in the dark... Here are some blind suggestions:
(1) Make sure the brackets (two HR1B-0003's) are offset where the two knee servos attach to each other. I almost didn't do it when putting mine together.
(2) Be sure the screw placements coincide with the correct servo horn numbers...

Knee to Thigh (Right/Left):
8 2
6 2 8 4
4 6

Knee to Shin (Right/Left):
4 6
2 6 4 8
8 2

I don't know, just some thoughts... post a pic if it's none of these help.

Statistics: Posted by bauermech — Sat Mar 04, 2006 3:15 am

Legs in neutral position

2006-03-03T22:02:34+01:00

Haven't had this issue, mine lets the legs fold down completely. Do you have a photo of the leg in the position you describe.

Carl

Statistics: Posted by Pev — Fri Mar 03, 2006 10:02 pm

Legs in neutral position

2006-03-03T21:42:44+01:00

When I put my Robonova together there was something odd about the legs. On page 13 they state that the legs must fold completely. The indexing on the knee joint does not seem to agree. When I run the example code the default leg position makes the knee bend backwards. Did anyone else encounter this?

Statistics: Posted by subpilot — Fri Mar 03, 2006 9:42 pm