Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Slide 8 Slide 9 Slide 10 Slide 11 Slide 12 Slide 13 Slide 14 Slide 15 Slide 16 Slide 17 Slide 18 Slide 19 Slide 20 Slide 21 Slide 22 Slide 23 Slide 24 Slide 25 Slide 26 Slide 27 Slide 28 Slide 29 Slide 30 Slide 31 Slide 32 Slide 33 Slide 34 Slide 35 Slide 36 Slide 37 Slide 38 Slide 39 Slide 40 Slide 41 Slide 42 Slide 43 Slide 44 Slide 45 Slide 46 Slide 47 Slide 48 Product List
Stepper Fundamentals Slide 44

This is a more realistic speed-torque curve. Notice that there are some speeds where the torque seems to drop to zero. This is due to the mechanical resonance points of the motor. A stepper is basically an under damped machine. Each time it takes a step, it over shoots and then settles in to the final position. Depending on the damping in the load, there may be some operating points that have a mechanical resonance that effectively drops the torque to zero at that speed.

PTM Published on: 2011-12-14