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What is a stepper motor controller?
Stepper motors are a type of brushless DC electric motor that divides a full rotation into several discrete “steps” or positions that the motor can navigate to. This allows for positional control of the motor by delivering it a command to move a certain number of steps.
Do you need a driver for a stepper motor?
A Stepper Motor Driver is the driver circuit that enables the stepper motor to function the way it does. For example, stepper motors require sufficient and controlled energy for phases in a precise sequence. Due to this, stepper motors are considered more advanced than the typical DC motor.
How many control pins does a stepper motor have?
The driver has built-in translator for easy operation. This reduces the number of control pins to just 2, one for controlling the steps and other for controlling spinning direction.
Is there a driver for a bipolar stepper motor?
The A4988 stepper motor driver has output drive capacity of up to 35 V and ±2A and lets you control one bipolar stepper motor at up to 2A output current per coil like NEMA 17. The driver has built-in translator for easy operation. This reduces the number of control pins to just 2,…
Can you use more than one fat stepper motor?
One fat driver can come close in price to six smaller drivers, so the saving won’t be too impressive. In both situations, care must be taken if the stepper shafts are connected mechanically. Even within one stepper series, you will get 5% step inaccuracy, leading to higher current drain than when not coupled and idle.
How does the a4988 control stepper motor work?
Microstep Selection Pins. The A4988 driver allows microstepping by allowing intermediate step locations. This is achieved by energizing the coils with intermediate current levels. For example, if you choose to drive NEMA 17 having 1.8° or 200 steps per revolution in quarter-step mode, the motor will give 800 microsteps per revolution.