Romeo V2 Voltage issue.

userHead matthewdenny 2013-05-11 03:27:18 6148 Views6 Replies
I am using a battery that is charged to ~8.0V.  I have also connected a DC motor to Motor1.  The motor power switch is on, and I am using the code:

analogWrite (5,255);

Which should put the motor at full speed.  However I have measured the motor to be receiving ~6.1 V, and moving less powerfully than it should.  The motor is drawing only .3A of current (.5A at stall).  Why isn't the motor getting the full 8 amps?
2013-05-15 17:51:02 You can try to test motor voltage to GND?not motor + to motor - , that voltage should be close to 8V.
userHeadPic Jane
2013-05-14 19:38:51 The battery connected to the Motor Power In = 8V

Maximum voltage to DC motors on motor ports = 6V

Why isn't the motor voltage also 8V?
userHeadPic matthewdenny
2013-05-14 13:52:54 Do you mean that the battery supply Romeo with 8V and Romeo doesn't connect to DC motor, however, M1 output is 6.1V?  userHeadPic Jane
2013-05-13 19:37:54 I am using a Fishertechnik S-motor rated for 9V.  Although even when I have no motor connected the output still reads 6.1V  Doesn't the output voltage match the external input? userHeadPic matthewdenny
2013-05-13 15:53:58 [url=][/url] userHeadPic Jane
2013-05-13 15:52:57 Which DC motor did you use?
I have tried the above motor. The measurement of the DC motor voltage is 6.1V.  The series of DC moter rated voltage is 6V for fear being damaged. And Writing 255 is the full speed.

I hope it'll help you!  :)

userHeadPic Jane