I can change the hub, its not a problem. But, do you think is to much wheel for this motor?
It should go at 1m/s and good acceleration carrying 0.7kg, also 0.3-0.4m/s with 1.4kg
The motor’s shaft is 3mm in diameter, and Pololu makes various diameters of wheels which will press-fit right onto the shaft (see cross-selling). If you want to use a BaneBots wheel, you would need one like RB-Ban-151, which has a 3mm bore and 1/2" hex mounting (0.4" wide). This would mate with RB-Ban-91 which has a 0.5" hex bore and is 0.4" wide.
That hub does not connect to the sumo tire. Also, that motor would likely fit entirely inside that sumo tire and likely won’t be powerful enough for your needs.
Yes, but you would need to glue the shaft in place since the bore is 3mm and there is no set screw mount.
The Drive Motor Sizing Tool is the best way to tell. Inputting 1.5Kg-cm, 2 drive wheels, a radius of 1.4375", a speed of 4’ per second, a maximum angle of 10 degrees etc. The torque required is 15 oz-in. The motor you chose has a stall of 15oz-in and would be far from powerful enough. Even if you drop the weight to 0.75Kg, the torque is 7.5oz-in, which is half the motor’s stall. You should be operating at ~1/4 stall.
The choice is yours.
4- 7/8" means 4 inches plus 7/8 inch = 4.875 inches = 12.3825cm
Not quite. You link to a series 40 (0.4" wide) hub, but the wheel is 0.8" wide. You’d need RB-Ban-155 (series 40 hub, 3mm bore, 2-wide = 0.8" wide) and RB-Ban-104 (0.8" wide, 0.5" hex bore).
You’ll see it’s quite a large and heavy wheel for such a small motor…
It’s a “feeling” since calculations rarely take into account the inertia of the wheel itself. Consider making a 3D CAD model of the project (many free 3D CAD software out there). What additional weight do you plan to add?
Yes - that combination looks possible.
When calculating the torque and motor rpm, use the 1m/s speed and total weight of the robot including the 1.4Kg payload. The tool does not factor in a force acting against the motion (as in a sumo competition) so you will need to read the associated Drive Motor Sizing Tutorial and add an additional force acting at the center of the wheel.
So the total weight is 1.5Kg + 0.7Kg? Consider a sumo robot with similar specifications:
Lynxmotion Viper Sumo Kit
Lynxmotion TERMINATOR SUMO ROBOT KIT
Lynxmotion Predator 6 Wheel Sumo Kit (no electronics) SR2-KT
They all use GHM series spur gear motors.