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Cannot stand up
07-05-2018, 08:02 AM (This post was last modified: 07-05-2018 08:03 AM by mr.peter.matyas.)
Post: #1
Cannot stand up
Hi all,

Please help me. It seems, the robot cannot stand up and balance.
I guess, the servos are too strong, because when I try to lift it up, motors "kick" with a strong movement to correct, but it's result is to hit to ground on the other side of it.

Thank you,

Peter

   
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07-05-2018, 09:16 AM
Post: #2
RE: Cannot stand up
Could you please upload a video? It will help to understand the problem.
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07-05-2018, 11:06 AM
Post: #3
RE: Cannot stand up
(07-05-2018 09:16 AM)JJrobots JP Wrote:  Could you please upload a video? It will help to understand the problem.

Sure:

https://youtu.be/LKXpMdeN-Fc
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07-05-2018, 12:00 PM
Post: #4
RE: Cannot stand up
(07-05-2018 11:06 AM)mr.peter.matyas Wrote:  
(07-05-2018 09:16 AM)JJrobots JP Wrote:  Could you please upload a video? It will help to understand the problem.

Sure:

https://youtu.be/LKXpMdeN-Fc

Thanks for the video. Could you check that the motor cables are connected to the right motors? (not swapped). Another tip: try to start the Brobot on a hard surface (on top of a table for example)
It seems that one motor has more power than the other. It is hard to appreciate in the video which one is the overpowered. The stepper motor drivers power outup can be adjusted via the screw on the top. More info here: https://www.jjrobots.com/b-robot-evo-2-assembly-guide/ (My B-robot lacks of power or fall without reason)
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07-05-2018, 02:44 PM (This post was last modified: 07-05-2018 03:04 PM by mr.peter.matyas.)
Post: #5
RE: Cannot stand up
(07-05-2018 12:00 PM)JJrobots JP Wrote:  
(07-05-2018 11:06 AM)mr.peter.matyas Wrote:  
(07-05-2018 09:16 AM)JJrobots JP Wrote:  Could you please upload a video? It will help to understand the problem.

Sure:

https://youtu.be/LKXpMdeN-Fc

Thanks for the video. Could you check that the motor cables are connected to the right motors? (not swapped). Another tip: try to start the Brobot on a hard surface (on top of a table for example)
It seems that one motor has more power than the other. It is hard to appreciate in the video which one is the overpowered. The stepper motor drivers power outup can be adjusted via the screw on the top. More info here: https://www.jjrobots.com/b-robot-evo-2-assembly-guide/ (My B-robot lacks of power or fall without reason)


Still not ok. Please advise. As I can see that, it rotates it's wheel to the wrong direction when I try to lift up. May be the IMU sensor the problem?

https://youtu.be/QLCVN-NYfOE


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07-06-2018, 02:47 AM
Post: #6
RE: Cannot stand up
(07-05-2018 02:44 PM)mr.peter.matyas Wrote:  
(07-05-2018 12:00 PM)JJrobots JP Wrote:  
(07-05-2018 11:06 AM)mr.peter.matyas Wrote:  
(07-05-2018 09:16 AM)JJrobots JP Wrote:  Could you please upload a video? It will help to understand the problem.

Sure:

https://youtu.be/LKXpMdeN-Fc

Thanks for the video. Could you check that the motor cables are connected to the right motors? (not swapped). Another tip: try to start the Brobot on a hard surface (on top of a table for example)
It seems that one motor has more power than the other. It is hard to appreciate in the video which one is the overpowered. The stepper motor drivers power outup can be adjusted via the screw on the top. More info here: https://www.jjrobots.com/b-robot-evo-2-assembly-guide/ (My B-robot lacks of power or fall without reason)


Still not ok. Please advise. As I can see that, it rotates it's wheel to the wrong direction when I try to lift up. May be the IMU sensor the problem?

https://youtu.be/QLCVN-NYfOE

I think you reversed the motor cables. Look at the photo taken from the assembly video of the robot.
   
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07-06-2018, 06:20 AM
Post: #7
RE: Cannot stand up
(07-06-2018 02:47 AM)MacLolo Wrote:  
(07-05-2018 02:44 PM)mr.peter.matyas Wrote:  
(07-05-2018 12:00 PM)JJrobots JP Wrote:  
(07-05-2018 11:06 AM)mr.peter.matyas Wrote:  
(07-05-2018 09:16 AM)JJrobots JP Wrote:  Could you please upload a video? It will help to understand the problem.

Sure:

https://youtu.be/LKXpMdeN-Fc

Thanks for the video. Could you check that the motor cables are connected to the right motors? (not swapped). Another tip: try to start the Brobot on a hard surface (on top of a table for example)
It seems that one motor has more power than the other. It is hard to appreciate in the video which one is the overpowered. The stepper motor drivers power outup can be adjusted via the screw on the top. More info here: https://www.jjrobots.com/b-robot-evo-2-assembly-guide/ (My B-robot lacks of power or fall without reason)


Still not ok. Please advise. As I can see that, it rotates it's wheel to the wrong direction when I try to lift up. May be the IMU sensor the problem?

https://youtu.be/QLCVN-NYfOE

I think you reversed the motor cables. Look at the photo taken from the assembly video of the robot.

It's ok, but you told me to give this a try. Smile
I changed back, the result the same that we started.

https://youtu.be/OR84h1FFCCI
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07-06-2018, 09:52 AM
Post: #8
RE: Cannot stand up
(07-06-2018 06:20 AM)mr.peter.matyas Wrote:  
(07-06-2018 02:47 AM)MacLolo Wrote:  
(07-05-2018 02:44 PM)mr.peter.matyas Wrote:  
(07-05-2018 12:00 PM)JJrobots JP Wrote:  
(07-05-2018 11:06 AM)mr.peter.matyas Wrote:  Sure:

https://youtu.be/LKXpMdeN-Fc

Thanks for the video. Could you check that the motor cables are connected to the right motors? (not swapped). Another tip: try to start the Brobot on a hard surface (on top of a table for example)
It seems that one motor has more power than the other. It is hard to appreciate in the video which one is the overpowered. The stepper motor drivers power outup can be adjusted via the screw on the top. More info here: https://www.jjrobots.com/b-robot-evo-2-assembly-guide/ (My B-robot lacks of power or fall without reason)


Still not ok. Please advise. As I can see that, it rotates it's wheel to the wrong direction when I try to lift up. May be the IMU sensor the problem?

https://youtu.be/QLCVN-NYfOE

I think you reversed the motor cables. Look at the photo taken from the assembly video of the robot.

It's ok, but you told me to give this a try. Smile
I changed back, the result the same that we started.

https://youtu.be/OR84h1FFCCI
Yes, could be the IMU (damaged?) They are pretty sensitive. Contact jjRobotos, they will know what to do
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