My setup includes the following:
1 Raspberry Pi Zero W
1 Arduino Pro Micro
2 Pololu Micro Metal Gearmotor #3072
1 Pololu DRV8833 Dual Motor Driver Carrier #2130
2 Pololu Magnetic Encoders #4761
I’ve noticed that the 6V version of the 30:1 HPCB Micro Metal Gearmotor #3072 performs significantly better at lower voltages than the 12V version of the 30:1 HPCB Micro Metal Gearmotor #3049 and even performs better at its rated voltage of 6V than the 12V motor at its rated voltage. What is going on internally to allow this to happen as both motors are advertised in the same way as HPCB motors?
My current setup requires the motors to output 1000 RPM at approximately 0.35 kg*cm for 0.5 seconds based on some conservative estimations. Looking at the performance curve of the 6V 30:1 Micro Metal Gearmotor #3072 in the Micro Metal Gearmotor datasheet, these requirements are clearly not possible at 6V. To overcome this issue, I intend to run the motors using 3 LiPo batteries at a voltage of 11.1 V. Since I’m only running the motors at this excessive voltage for 0.5 seconds, I’m thinking the motors won’t overheat. Will the motors be damaged under these conditions? Should I use another motor?
I also see that at 11.1 V, I will be above the rated voltage of the Motor Driver Carrier #2130 of 10.8 V. Will the motor driver be damaged?
Any other suggestions for how I can meet the above speed and torque requirements are welcome.