A stepper motor or step motor or stepping motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor’s position can then be commanded to move and hold at one of these steps without any position sensor for feedback (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed. Torque Curve Graph Model Step Angle Motor Length Current /Phase Resistance /Phase Inductance /Phase Holding Torque Lead wires Detent Torque Rotor Inertia Motor Weight (( °) (L)mm A Ω mH N.m No. kg.cm g.cm Kg 110HS99-5504 1.8 99 5.5 0.9 12 11.2 4 3 5500 5 110HS150-6504 1.8 150 6.5 0.8 15 21 4 5.9 10900 8.4 110HS201-8004 1.8 201 8 0.67 12 28 4 7.5 16200 11.7 (E&OE)
