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Starting up the B-Robot
10-09-2015, 10:53 AM
Post: #7
RE: Starting up the B-Robot
(10-09-2015 10:46 AM)Avcon Wrote:  
(10-09-2015 10:01 AM)JohnQ Wrote:  
(10-09-2015 07:06 AM)Avcon Wrote:  Continued........
- The measured Vref on stepperMotor Drivers A9988 is 1.00 volt
- The calculated max current is then 2A.
- The rated current for the steppermotors is 3A.

But, when the motors are spinning... are they powerful enough to keep your robot in balance? Or they are just rotating in one direction no matter the angle of your robot?

I had some problem with my first stepper motors due to EM interferences. Could you try to place the IMU away from the motors (on the top shelf for example) or use a very short cable to connect the IMU to the I2C socket in the Brain Shield?
Thanks for your reply.
- The B-Robot has never been in balance.
- The wheels are spinning one speed, one direction, with enough torque
- IMU tested with supplied test.ino; appears to be ok
- No response at any IMU-movement to motors
In short:
- IMU looks ok
- StepperMotorDrivers A4988 looks ok
- StepperMotors look ok
- but no balancing activity at all

Try to place the IMU away from the motors (on the top shelf for example) or use a very short cable to connect the IMU to the I2C socket in the Brain Shield.
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Messages In This Thread
Starting up the B-Robot - Avcon - 10-08-2015, 10:20 PM
RE: Starting up the B-Robot - JohnQ - 10-08-2015, 10:56 PM
RE: Starting up the B-Robot - Avcon - 10-09-2015, 05:22 AM
RE: Starting up the B-Robot - Avcon - 10-09-2015, 07:06 AM
RE: Starting up the B-Robot - JohnQ - 10-09-2015, 10:01 AM
RE: Starting up the B-Robot - Avcon - 10-09-2015, 10:46 AM
RE: Starting up the B-Robot - JohnQ - 10-09-2015 10:53 AM
RE: Starting up the B-Robot - sasa999 - 10-09-2015, 01:09 PM
RE: Starting up the B-Robot - Avcon - 10-09-2015, 09:53 PM

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