Bioloid Gp servo problems

[mrbaritonefreak]

So at my school we have a Bioloid Gp humanoid robot, it has been there for a while and my friend and I wanted to see if we could get it working. So we found that one servo in the leg was dead and we got a new one but now the servo is unresponsive. I was wondering if anyone here has any experience with these robots and could help me out.

[Mojo-Jojo]

So at my school we have a Bioloid Gp humanoid robot, it has been there for a while and my friend and I wanted to see if we could get it working. So we found that one servo in the leg was dead and we got a new one but now the servo is unresponsive. I was wondering if anyone here has any experience with these robots and could help me out.

Is the servo the exact same?

 

Servos use PWM to control the angle to which it moves. If the servo is a different model, especially if its range is different, the Width Modulation for which it was programmed will no longer work.

[mrbaritonefreak]

It is the exact same model as the old one, but it does not have an ID number like the servo that came with the kit. Could that have something to do with it?

[Mojo-Jojo]

It is the exact same model as the old one, but it does not have an ID number like the servo that came with the kit. Could that have something to do with it?

If the model is the same, and the range of the angles it can reach is the same too, then that shouldn't be a problem.

 

Do you guys have any sort of frequency generator or PWM pulse generator lying around? (even an Arduino with PWM code would do) That'd help you test the servo.

 

You can even test the servo by replacing the working servo on the other leg with this one. If it does work there, that'd suggest the issue lies somewhere else. 

[mrbaritonefreak]

I think we have a PWM generator around somewhere and I will see if it all checks out, thanks for the help hopefully this fixes it.

[Mojo-Jojo]

I think we have a PWM generator around somewhere and I will see if it all checks out, thanks for the help hopefully this fixes it.

No problem!

 

What you're trying to find out is if both servos react the same to the same PWM signal.

If they do, and it still doesn't work in the 'bot, I'd suggest tracing back where the PWM cable leads to.

There might simply be a disconnected cable, or something more severe like a broken PWM generator.