- 1 How does microstepping affect speed?
- 2 Do stepper motors have high torque?
- 3 Does microstepping increase current?
- 4 Is it good to microstep a stepper motor?
- 5 How does microstepping improve the accuracy of a car?
- 6 When does a microstep have to be realized?
- 7 How is the incremental torque of a microstep determined?
How does microstepping affect speed?
Microstepping has two principal benefits: it provides increased resolution without a sacrifice in top speed, and it provides smoother low speed motion. A shaft speed of 40 revolutions per second results in a linear velocity of only 40 mm per second.
Do stepper motors have high torque?
Stepper motors remain popular for industrial motor applications because they are low-cost, rugged, simple, have high torque at startup and low speeds, require little maintenance, and they can operate in an open loop control system.
Does microstepping increase current?
This is because microstepping allows a gradual build-up and decay of current in each motor winding, which delivers more consistent torque and, therefore, smoother motion than full-step operation. By simulating a sinusoidal voltage waveform, microstepping delivers smoother motion than full- or half-stepping.
Is it good to microstep a stepper motor?
The lure of microstepping a stepper motor for precision must be tempered by torque considerations. The graph shows that at 16 microsteps/full step, the incremental torque for one microstep is less than 10% of the full-step holding torque. The lure of microstepping a two-phase stepper motor is compelling.
How does microstepping improve the accuracy of a car?
Their aim typically is to reduce the detent torque, usually at the expense of holding torque, so the torque-versus-rotor position is closer to a sine wave. They also hope to improve linearity of torque versus current. These efforts reduce but do not eliminate the compromises associated with microstepping in regards to accuracy.
When does a microstep have to be realized?
The consequence is that if the load torque plus motor friction and detent torque exceeds the incremental torque of a microstep, successive microsteps will have to be realized until the accumulated torque exceeds the load torque plus the motor friction and detent torque. Simply stated, taking a microstep does not mean the motor will actually move.
How is the incremental torque of a microstep determined?
The incremental torque per microstep is determined by the following equation: For a motor with 0.35 Nm holding torque using a 256 step division ratio (SDR), the incremental torque produced by each microstep would be 0.002 Nm.