RoboSavvy Forum

Problem with Dynamixel ID

2009-01-05T22:35:45+01:00

I think the magic words are on page 23 (as part of example 3):

Regardless of whether the Broadcasting ID is used or the Status Return Level (Address 16) is 0, a Status Packet is always returned by the PING instruction.

So... my guess is that you are using a PING packet to poll the IDs in turn. In which case it all makes sense. But, you say your robot isn't working, so presumably one of your servos isn't quite right.

I suggest that you attach only a single servo to the bus, find out which servo it is (with a PING to ID 254) and repeat for all the servos (one at a time)...

could

Statistics: Posted by RandomMatt — Mon Jan 05, 2009 10:35 pm

Problem with Dynamixel ID

2009-01-05T16:20:45+01:00

Mh ok.
Normaly i do not find the 0xFE ID because its the Broadcasting ID.
Maybe i find it because there is a circuit between the engines and the CM-5.

The documentation just say that this is the Broadcasting ID. Is it normal that this ID is found every time. I dont think so.

Statistics: Posted by bergere — Mon Jan 05, 2009 4:20 pm

Problem with Dynamixel ID

2009-01-03T12:15:39+01:00

Have a look at example 1, pages 19 and 20, of the AX-12 Manual - http://robosavvy.com/site/docs/Bioloid/AX-12(english).pdf

My guess is that everything will become clear.

(Sorry about the URL, bbcode doesn't like URLs with brackets)

Statistics: Posted by RandomMatt — Sat Jan 03, 2009 12:15 pm

Problem with Dynamixel ID

2009-01-03T10:38:23+01:00

The first thing is easily fixed with a write to ID 254

What should i write to ID 254 (FE)? (Remember this servo does not exist)

Statistics: Posted by bergere — Sat Jan 03, 2009 10:38 am

Problem with Dynamixel ID

2009-01-02T18:01:24+01:00

All the servos respond to commands (packets) sent to ID 254. So, if you have a single servo wired up you would expect it to respond to its id as well as id 254.

So that's not your problem, my guess is that one of your servos has either its reply setting (byte 16) or its id (byte 3) corrupted. The first thing is easily fixed with a write to ID 254, so you'll end up setting the reply setting for all the connected servos. You can fix the id in the same way if you only have one servo connected at once (that way you don't need to know what its current id is).

Statistics: Posted by RandomMatt — Fri Jan 02, 2009 6:01 pm

Problem with Dynamixel ID

2009-01-02T11:56:49+01:00

Hi again,

I bought the Bioloid Comprehensive Kit and do some funny stuff with it.
But the last time i´m using my robot, some engines doesn´t move anymore.
I change this engines but the robot do crazy things now (I use the same ID´s as before).

As i scan the robot for Dynamixels I found that the ID: FE (254?) was found but such a ID engine isnt connected. If i connect just 1 engine with ID 1 he found ID 1 and ID 254.

Maybe because of that my robot doesnt do what he should do ^^

Somebody else have this problem?

And another question. How many engines can i connect in a row without problems?

Statistics: Posted by bergere — Fri Jan 02, 2009 11:56 am