Stepper Sizing

Torque-speed curves, microstepping and drive voltage for a stepper axis.

Stepper Motor Sizing

Motor selection, torque-speed curves, and motion profile analysis

Motor & Driver

Stepper Motor

Driver

Supply Voltage

Microstepping

Load Parameters

Load Inertia

kg·cm²

Friction Torque

External Load

Transmission

Lead Screw Pitch (0=direct)

mm/rev

Gear Ratio

Motion Profile

Target Speed

RPM

Acceleration

RPM/s

Motion Profile

Safety Factor

Motor Performance

Required Torque

0.381 Nm

Holding Torque

1.26 Nm

Torque Margin

0.879 Nm

Utilization

30 %

Steps/Rev

3200

Pulse Rate

16000 Hz

Max Speed (est)

487 RPM

Inertia Ratio

1.67

Torque-Speed Curve

Motion Profile

Design Summary

Motor Specs

Frame: NEMA 23

Current: 2.8 A/phase

Resistance: 0.9 Ω

Inductance: 2.5 mH

Time Constant: 2.78 ms

Motion Parameters

Angular Resolution: 0.1125°/step

Linear Velocity: 40.0 mm/s

Linear Resolution: 2.50 µm/step

Accel Time: 600 ms

Accel Steps: 4800

Design Checks

✓ Adequate torque margin

✓ Good inertia match (<10:1)

✓ Speed within capability

✓ Away from resonance

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Stepper Motor Sizing

Motor selection, torque-speed curves, and motion profile analysis

Motor & Driver

Stepper Motor

Driver

Supply Voltage

Microstepping

Load Parameters

Load Inertia

kg·cm²

Friction Torque

External Load

Transmission

Lead Screw Pitch (0=direct)

mm/rev

Gear Ratio

Motion Profile

Target Speed

RPM

Acceleration

RPM/s

Motion Profile

Safety Factor

Motor Performance

Required Torque

0.381 Nm

Holding Torque

1.26 Nm

Torque Margin

0.879 Nm

Utilization

30 %

Steps/Rev

3200

Pulse Rate

16000 Hz

Max Speed (est)

487 RPM

Inertia Ratio

1.67

Torque-Speed Curve

Motion Profile

Design Summary

Motor Specs

Frame: NEMA 23

Current: 2.8 A/phase

Resistance: 0.9 Ω

Inductance: 2.5 mH

Time Constant: 2.78 ms

Motion Parameters

Angular Resolution: 0.1125°/step

Linear Velocity: 40.0 mm/s

Linear Resolution: 2.50 µm/step

Accel Time: 600 ms

Accel Steps: 4800

Design Checks

✓ Adequate torque margin

✓ Good inertia match (<10:1)

✓ Speed within capability

✓ Away from resonance