I require your help regarding a problem I’m encountering.
Hello.
I am new here on the forum.
My name is Egon and live in the Netherlands.
Robots are a great hobby of mine.
I have bought a Doit Plen 18 dof Robot and i having problems with the ViVi controller board.
I have debuged all the servos that the robot is standing strait.he walks and all seems to be working ok.
When i turn the robot off and then on all the servos start turning and wont stop.
The seller wont help me with this problem.
I am looking for a substitute board for this little robot
Hope someone can help me.
This seems quite odd. If the switch cuts power to the robot, the servos should not get power. It sounds like the servos are still powered, but since the controller is turned off, there’s still a signal (perhaps 0ms) causing the servos to turn. A simple fix would be to ensure power to the servos is cut by the on/off switch. If you provide some more photos / details, we might be able to spot a wiring issue.
In terms of another controller board, you might consider almost any which is meant for an RC-based humanoid. The issue will be that its shape will be very different, and you’ll need to “hack” the frame to mount a different controller (controllers have no standard dimensions). https://www.robotshop.com/en/servo-controllers.html
Hello.
Thanks for your respons.
The problem accours when i turn the robot on.
All the servos starts direcly to rotate.
When i remove the half(does not matter wich half) off the servos and turn the robot on,the servos rotate to zero point.
Wen i plug in the rest of the servos they also rotate to zero point.
The robot is now standing strait as it should.(see picture1)
When i turn the robot off and then on then all the servos starts rotating en never stops.(See picture 2)
Looks like the board get power with all servos plugged in the voltage drops and the board gives strange pulses to the servos.
I have try another powersupply and with start up the robot it uses 3 amps.
Mabye in a peak it uses more.
The exact same thing is happening to me despite changing boards and double checking all servos. There is a problem with the vivi robot (either board or firmware), and the sellers refuse to address it. By plugging in each servo one at a time, I have noticed that the problem does appear until the last two, which confirms the drop in voltage theory.
Micro servos tend to consume higher current than standard, which will be hard to address. You might “hack” the robot to be able to use batteries with higher discharge current.
Thanks for the advice. The plen.jp company sells a very different board (which is Arduino Micro based), and while it costs ten times the price, I suspect it is better.
