Motor problems on my excavator?

[Azonic]

Originally Posted by Madda

Your radio settings might be equal but I woud still try to adjust them and see if that makes things better or worse. This method can help answering the motors different speed question.
Then make sure that all the wires are correctly connected and not damaged from somewhere.
When my other radio started to die the motors began to glitch too and if you say that your rx is acting strangely then I would assume that there would be another problem. Maybe try to change the channels you are using for your motors atm to something else. If you use 1 and 2 channel for forward/back and steering then change them to 3 and 4 channel and see if anything changes etc. Someone with same radio can help you finding the problem.
I think that problem is somewhere in electronics but you never know.

Btw, what radio do you have?

Ok, i will try that tomorrow and see if it makes any difference.

I use a Graupner MC-19IFS 2.4.

[elliot330]

Kalle,,

have you tried swapping the motor wires at the speed controller from left to right, see if the problem moves tracks? Have you recalibrated the Sabertooth after fitting the CTI module, ie show it where full forward is and full reverse on both channels. Can you display your servo positions in the radio via a graph? When in reverse are the bars the same lenght. Are the end points set to 100% on both channels?

Just a few quick easy things to try first.

[Azonic]

Thanks Elliot, i will check this later today!

End points are the same yes.

Can you really recalibrate the sabertooth?

[Azonic]

I just tryed to drive it for a while, first it was all good forward and back, then i did run only the left track, after that it started to glitch and then it was a little slower then the right one. Im going to try to switch the channels.

No sucsess in changing the channel to another one, same problem, it seem to be some kind of voltage problem, i have run it on the bench and it goes well for a little time, then the CTI module shuts down and i lose contact with the model, if i flip the model switch it goes back in bind mode and i can run it for a little while again, it must be the CTI module that cant handle the voltage from the tracks or something like that. I will try without the CTI module.