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1–40 Hybrid Stepper Motors - NEMA Size 17 NEW MAXIMUM THEORETICAL TORQUE CURVES DRIVE SETTING 80V DC. 70 60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 40 45 50 Revolutions per Second Series Connection Parallel Connection S9117M–D18HT S9117M–S18HT .8 amp Peak Current 1.7 amps Peak Current 0 1 2 3 4 5 6 7 8 9 10 Full Step X 103 per Second 40 0 0 5 10 15 20 25 30 35 40 45 50 30 20 10 Series Connection Parallel Connection S9117M—D13HT S9117M—S13HT .7 amp Peak Current 1.3 amps Peak Current Revolutions per Second 0 1 2 3 4 5 6 7 8 9 10 Full Step X 103  per Second 35 30 25 20 15 10 5 0 0 5 10 15 20 25 30 35 40 45 50 40 45 Series Connection Parallel Connection S9117M–D15HT S9117M–S15HT .8 amp  Peak Current 1.7 amps Peak Current Revolutions per Second 0 1 2 3 4 5 6 7 8 9 10 Full Step X 103 per Second