2. For the small, geared stepper motor 28BYJ-48:

a.

b.

c.

How many full steps result in one full rotation of the gearbox output shaft?

At 100 Steps/S, what is the shaft speed in rpm?

With a low-cost driver, the maximum achievable speed is related to the electrical properties of each

energized coil. What does the tolerance for DC resistance of the coil do to the tolerance for

maximum speed?

d. A 50 mNm load is supposed to run at a steady state speed of 15 rpm of the gearbox shaft. Can we

start the system from rest with a single step-rate command? Explain your answer.

Hint: Slide 43 of Lecture 4F

Hint for part c: Problem 1 of the homework set.

Hint for part d: First calculate the step rate of the motor for the desired output speed.